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      1 dnl **************************************************************************
      2 dnl * Initialize
      3 dnl **************************************************************************
      4 AC_INIT([[[SAMPLE]]],[[[x.xx]]],[bugs@yourdomain])
      5 
      6 dnl Identify where LLVM source tree is
      7 LLVM_SRC_ROOT="../.."
      8 LLVM_OBJ_ROOT="../.."
      9 
     10 dnl Find absolute paths to LLVM source and object trees
     11 LLVM_ABS_SRC_ROOT="`cd $srcdir ; cd $LLVM_SRC_ROOT ; pwd`"
     12 LLVM_ABS_OBJ_ROOT="`cd $LLVM_OBJ_ROOT ; pwd`"
     13 
     14 dnl Tell autoconf that this is an LLVM project being configured
     15 dnl This provides the --with-llvmsrc and --with-llvmobj options
     16 LLVM_CONFIG_PROJECT($LLVM_ABS_SRC_ROOT,$LLVM_ABS_OBJ_ROOT)
     17 
     18 dnl Try and find an llvm-config in the build directory. We are only using this
     19 dnl to detect the package level LLVM information (currently just the version),
     20 dnl so we just whatever one we find regardless of build mode.
     21 AC_MSG_CHECKING([llvm-config])
     22 llvm_config_path="`ls -1 $llvm_obj/*/bin/llvm-config 2> /dev/null | head -1`"
     23 if ! test -f "$llvm_config_path" ; then
     24    llvm_config_path="no"
     25 fi
     26 AC_MSG_RESULT([$llvm_config_path])
     27 
     28 dnl Determine the LLVM version, which may be required by the current Makefile
     29 dnl rules.
     30 AC_MSG_CHECKING([LLVM package version])
     31 if test "$llvm_config_path" != no ; then
     32   llvm_package_version=`$llvm_config_path --version`
     33 else
     34   llvm_package_version="unknown";
     35 fi
     36 AC_MSG_RESULT([$llvm_package_version])
     37 AC_SUBST(LLVM_VERSION, [$llvm_package_version])
     38 
     39 dnl Verify that the source directory is valid
     40 AC_CONFIG_SRCDIR(["Makefile.common.in"])
     41 
     42 dnl Place all of the extra autoconf files into the config subdirectory. Tell
     43 dnl various tools where the m4 autoconf macros are.
     44 AC_CONFIG_AUX_DIR([autoconf])
     45 
     46 dnl **************************************************************************
     47 dnl Begin LLVM configure.ac Import
     48 dnl **************************************************************************
     49 dnl
     50 dnl Derived from LLVM's configure.ac. This was imported directly here so that we
     51 dnl could reuse LLVM's build infrastructure without introducing a direct source
     52 dnl dependency on the LLVM files.
     53 
     54 dnl We need to check for the compiler up here to avoid anything else
     55 dnl starting with a different one.
     56 AC_PROG_CC(clang llvm-gcc gcc)
     57 AC_PROG_CXX(clang++ llvm-g++ g++)
     58 AC_PROG_CPP
     59 
     60 dnl Configure all of the projects present in our source tree. While we could
     61 dnl just AC_CONFIG_SUBDIRS on the set of directories in projects that have a
     62 dnl configure script, that usage of the AC_CONFIG_SUBDIRS macro is deprecated.
     63 dnl Instead we match on the known projects.
     64 
     65 dnl
     66 dnl One tricky part of doing this is that some projects depend upon other
     67 dnl projects.  For example, several projects rely upon the LLVM test suite.
     68 dnl We want to configure those projects first so that their object trees are
     69 dnl created before running the configure scripts of projects that depend upon
     70 dnl them.
     71 dnl
     72 
     73 dnl Disable the build of polly, even if it is checked out into tools/polly.
     74 AC_ARG_ENABLE(polly,
     75               AS_HELP_STRING([--enable-polly],
     76                              [Use polly if available (default is YES)]),,
     77                              enableval=default)
     78 case "$enableval" in
     79   yes) AC_SUBST(ENABLE_POLLY,[1]) ;;
     80   no)  AC_SUBST(ENABLE_POLLY,[0]) ;;
     81   default) AC_SUBST(ENABLE_POLLY,[1]) ;;
     82   *) AC_MSG_ERROR([Invalid setting for --enable-polly. Use "yes" or "no"]) ;;
     83 esac
     84 
     85 
     86 dnl Check if polly is checked out into tools/polly and configure it if
     87 dnl available.
     88 if (test -d ${srcdir}/tools/polly) && (test $ENABLE_POLLY -eq 1) ; then
     89   AC_SUBST(LLVM_HAS_POLLY,1)
     90   AC_CONFIG_SUBDIRS([tools/polly])
     91 fi
     92 
     93 dnl===-----------------------------------------------------------------------===
     94 dnl===
     95 dnl=== SECTION 2: Architecture, target, and host checks
     96 dnl===
     97 dnl===-----------------------------------------------------------------------===
     98 
     99 dnl Check the target for which we're compiling and the host that will do the
    100 dnl compilations. This will tell us which LLVM compiler will be used for
    101 dnl compiling SSA into object code. This needs to be done early because
    102 dnl following tests depend on it.
    103 AC_CANONICAL_TARGET
    104 
    105 dnl Determine the platform type and cache its value. This helps us configure
    106 dnl the System library to the correct build platform.
    107 AC_CACHE_CHECK([type of operating system we're going to host on],
    108                [llvm_cv_os_type],
    109 [case $host in
    110   *-*-aix*)
    111     llvm_cv_link_all_option="-Wl,--whole-archive"
    112     llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    113     llvm_cv_os_type="AIX"
    114     llvm_cv_platform_type="Unix" ;;
    115   *-*-irix*)
    116     llvm_cv_link_all_option="-Wl,--whole-archive"
    117     llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    118     llvm_cv_os_type="IRIX"
    119     llvm_cv_platform_type="Unix" ;;
    120   *-*-cygwin*)
    121     llvm_cv_link_all_option="-Wl,--whole-archive"
    122     llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    123     llvm_cv_os_type="Cygwin"
    124     llvm_cv_platform_type="Unix" ;;
    125   *-*-darwin*)
    126     llvm_cv_link_all_option="-Wl,-all_load"
    127     llvm_cv_no_link_all_option="-Wl,-noall_load"
    128     llvm_cv_os_type="Darwin"
    129     llvm_cv_platform_type="Unix" ;;
    130   *-*-minix*)
    131     llvm_cv_link_all_option="-Wl,-all_load"
    132     llvm_cv_no_link_all_option="-Wl,-noall_load"
    133     llvm_cv_os_type="Minix"
    134     llvm_cv_platform_type="Unix" ;;
    135   *-*-freebsd* | *-*-kfreebsd-gnu)
    136     llvm_cv_link_all_option="-Wl,--whole-archive"
    137     llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    138     llvm_cv_os_type="FreeBSD"
    139     llvm_cv_platform_type="Unix" ;;
    140   *-*-openbsd*)
    141     llvm_cv_link_all_option="-Wl,--whole-archive"
    142     llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    143     llvm_cv_os_type="OpenBSD"
    144     llvm_cv_platform_type="Unix" ;;
    145   *-*-netbsd*)
    146     llvm_cv_link_all_option="-Wl,--whole-archive"
    147     llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    148     llvm_cv_os_type="NetBSD"
    149     llvm_cv_platform_type="Unix" ;;
    150   *-*-dragonfly*)
    151     llvm_cv_link_all_option="-Wl,--whole-archive"
    152     llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    153     llvm_cv_os_type="DragonFly"
    154     llvm_cv_platform_type="Unix" ;;
    155   *-*-hpux*)
    156     llvm_cv_link_all_option="-Wl,--whole-archive"
    157     llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    158     llvm_cv_os_type="HP-UX"
    159     llvm_cv_platform_type="Unix" ;;
    160   *-*-interix*)
    161     llvm_cv_link_all_option="-Wl,--whole-archive"
    162     llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    163     llvm_cv_os_type="Interix"
    164     llvm_cv_platform_type="Unix" ;;
    165   *-*-linux*)
    166     llvm_cv_link_all_option="-Wl,--whole-archive"
    167     llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    168     llvm_cv_os_type="Linux"
    169     llvm_cv_platform_type="Unix" ;;
    170   *-*-gnu*)
    171     llvm_cv_link_all_option="-Wl,--whole-archive"
    172     llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    173     llvm_cv_os_type="GNU"
    174     llvm_cv_platform_type="Unix" ;;
    175   *-*-solaris*)
    176     llvm_cv_link_all_option="-Wl,-z,allextract"
    177     llvm_cv_no_link_all_option="-Wl,-z,defaultextract"
    178     llvm_cv_os_type="SunOS"
    179     llvm_cv_platform_type="Unix" ;;
    180   *-*-auroraux*)
    181     llvm_cv_link_all_option="-Wl,-z,allextract"
    182     llvm_cv_link_all_option="-Wl,-z,defaultextract"
    183     llvm_cv_os_type="AuroraUX"
    184     llvm_cv_platform_type="Unix" ;;
    185   *-*-win32*)
    186     llvm_cv_link_all_option="-Wl,--whole-archive"
    187     llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    188     llvm_cv_os_type="Win32"
    189     llvm_cv_platform_type="Win32" ;;
    190   *-*-mingw*)
    191     llvm_cv_link_all_option="-Wl,--whole-archive"
    192     llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    193     llvm_cv_os_type="MingW"
    194     llvm_cv_platform_type="Win32" ;;
    195   *-*-haiku*)
    196     llvm_cv_link_all_option="-Wl,--whole-archive"
    197     llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    198     llvm_cv_os_type="Haiku"
    199     llvm_cv_platform_type="Unix" ;;
    200   *-unknown-eabi*)
    201     llvm_cv_link_all_option="-Wl,--whole-archive"
    202     llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    203     llvm_cv_os_type="Freestanding"
    204     llvm_cv_platform_type="Unix" ;;
    205   *-unknown-elf*)
    206     llvm_cv_link_all_option="-Wl,--whole-archive"
    207     llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    208     llvm_cv_os_type="Freestanding"
    209     llvm_cv_platform_type="Unix" ;;
    210   *)
    211     llvm_cv_link_all_option=""
    212     llvm_cv_no_link_all_option=""
    213     llvm_cv_os_type="Unknown"
    214     llvm_cv_platform_type="Unknown" ;;
    215 esac])
    216 
    217 AC_CACHE_CHECK([type of operating system we're going to target],
    218                [llvm_cv_target_os_type],
    219 [case $target in
    220   *-*-aix*)
    221     llvm_cv_target_os_type="AIX" ;;
    222   *-*-irix*)
    223     llvm_cv_target_os_type="IRIX" ;;
    224   *-*-cygwin*)
    225     llvm_cv_target_os_type="Cygwin" ;;
    226   *-*-darwin*)
    227     llvm_cv_target_os_type="Darwin" ;;
    228   *-*-minix*)
    229     llvm_cv_target_os_type="Minix" ;;
    230   *-*-freebsd* | *-*-kfreebsd-gnu)
    231     llvm_cv_target_os_type="FreeBSD" ;;
    232   *-*-openbsd*)
    233     llvm_cv_target_os_type="OpenBSD" ;;
    234   *-*-netbsd*)
    235     llvm_cv_target_os_type="NetBSD" ;;
    236   *-*-dragonfly*)
    237     llvm_cv_target_os_type="DragonFly" ;;
    238   *-*-hpux*)
    239     llvm_cv_target_os_type="HP-UX" ;;
    240   *-*-interix*)
    241     llvm_cv_target_os_type="Interix" ;;
    242   *-*-linux*)
    243     llvm_cv_target_os_type="Linux" ;;
    244   *-*-gnu*)
    245     llvm_cv_target_os_type="GNU" ;;
    246   *-*-solaris*)
    247     llvm_cv_target_os_type="SunOS" ;;
    248   *-*-auroraux*)
    249     llvm_cv_target_os_type="AuroraUX" ;;
    250   *-*-win32*)
    251     llvm_cv_target_os_type="Win32" ;;
    252   *-*-mingw*)
    253     llvm_cv_target_os_type="MingW" ;;
    254   *-*-haiku*)
    255     llvm_cv_target_os_type="Haiku" ;;
    256   *-*-rtems*)
    257     llvm_cv_target_os_type="RTEMS" ;;
    258   *-*-nacl*)
    259     llvm_cv_target_os_type="NativeClient" ;;
    260   *-unknown-eabi*)
    261     llvm_cv_target_os_type="Freestanding" ;;
    262   *)
    263     llvm_cv_target_os_type="Unknown" ;;
    264 esac])
    265 
    266 dnl Make sure we aren't attempting to configure for an unknown system
    267 if test "$llvm_cv_os_type" = "Unknown" ; then
    268   AC_MSG_ERROR([Operating system is unknown, configure can't continue])
    269 fi
    270 
    271 dnl Set the "OS" Makefile variable based on the platform type so the
    272 dnl makefile can configure itself to specific build hosts
    273 AC_SUBST(OS,$llvm_cv_os_type)
    274 AC_SUBST(HOST_OS,$llvm_cv_os_type)
    275 AC_SUBST(TARGET_OS,$llvm_cv_target_os_type)
    276 
    277 dnl Set the LINKALL and NOLINKALL Makefile variables based on the platform
    278 AC_SUBST(LINKALL,$llvm_cv_link_all_option)
    279 AC_SUBST(NOLINKALL,$llvm_cv_no_link_all_option)
    280 
    281 dnl Set the "LLVM_ON_*" variables based on llvm_cv_platform_type
    282 dnl This is used by lib/Support to determine the basic kind of implementation
    283 dnl to use.
    284 case $llvm_cv_platform_type in
    285   Unix)
    286     AC_DEFINE([LLVM_ON_UNIX],[1],[Define if this is Unixish platform])
    287     AC_SUBST(LLVM_ON_UNIX,[1])
    288     AC_SUBST(LLVM_ON_WIN32,[0])
    289     ;;
    290   Win32)
    291     AC_DEFINE([LLVM_ON_WIN32],[1],[Define if this is Win32ish platform])
    292     AC_SUBST(LLVM_ON_UNIX,[0])
    293     AC_SUBST(LLVM_ON_WIN32,[1])
    294     ;;
    295 esac
    296 
    297 dnl Determine what our target architecture is and configure accordingly.
    298 dnl This will allow Makefiles to make a distinction between the hardware and
    299 dnl the OS.
    300 AC_CACHE_CHECK([target architecture],[llvm_cv_target_arch],
    301 [case $target in
    302   i?86-*)                 llvm_cv_target_arch="x86" ;;
    303   amd64-* | x86_64-*)     llvm_cv_target_arch="x86_64" ;;
    304   sparc*-*)               llvm_cv_target_arch="Sparc" ;;
    305   powerpc*-*)             llvm_cv_target_arch="PowerPC" ;;
    306   arm*-*)                 llvm_cv_target_arch="ARM" ;;
    307   mips-*)                 llvm_cv_target_arch="Mips" ;;
    308   mipsel-*)               llvm_cv_target_arch="Mips" ;;
    309   xcore-*)                llvm_cv_target_arch="XCore" ;;
    310   msp430-*)               llvm_cv_target_arch="MSP430" ;;
    311   hexagon-*)              llvm_cv_target_arch="Hexagon" ;;
    312   mblaze-*)               llvm_cv_target_arch="MBlaze" ;;
    313   nvptx-*)                llvm_cv_target_arch="NVPTX" ;;
    314   *)                      llvm_cv_target_arch="Unknown" ;;
    315 esac])
    316 
    317 if test "$llvm_cv_target_arch" = "Unknown" ; then
    318   AC_MSG_WARN([Configuring LLVM for an unknown target archicture])
    319 fi
    320 
    321 # Determine the LLVM native architecture for the target
    322 case "$llvm_cv_target_arch" in
    323     x86)     LLVM_NATIVE_ARCH="X86" ;;
    324     x86_64)  LLVM_NATIVE_ARCH="X86" ;;
    325     *)       LLVM_NATIVE_ARCH="$llvm_cv_target_arch" ;;
    326 esac
    327 
    328 dnl Define a substitution, ARCH, for the target architecture
    329 AC_SUBST(ARCH,$llvm_cv_target_arch)
    330 
    331 dnl Check for the endianness of the target
    332 AC_C_BIGENDIAN(AC_SUBST([ENDIAN],[big]),AC_SUBST([ENDIAN],[little]))
    333 
    334 dnl Check for build platform executable suffix if we're crosscompiling
    335 if test "$cross_compiling" = yes; then
    336   AC_SUBST(LLVM_CROSS_COMPILING, [1])
    337   AC_BUILD_EXEEXT
    338   ac_build_prefix=${build_alias}-
    339   AC_CHECK_PROG(BUILD_CXX, ${ac_build_prefix}g++, ${ac_build_prefix}g++)
    340   if test -z "$BUILD_CXX"; then
    341      AC_CHECK_PROG(BUILD_CXX, g++, g++)
    342      if test -z "$BUILD_CXX"; then
    343        AC_CHECK_PROG(BUILD_CXX, c++, c++, , , /usr/ucb/c++)
    344      fi
    345   fi
    346 else
    347   AC_SUBST(LLVM_CROSS_COMPILING, [0])
    348 fi
    349 
    350 dnl Check to see if there's a .svn or .git directory indicating that this
    351 dnl build is being done from a checkout. This sets up several defaults for
    352 dnl the command line switches. When we build with a checkout directory,
    353 dnl we get a debug with assertions turned on. Without, we assume a source
    354 dnl release and we get an optimized build without assertions.
    355 dnl See --enable-optimized and --enable-assertions below
    356 if test -d ".svn" -o -d "${srcdir}/.svn" -o -d ".git" -o -d "${srcdir}/.git"; then
    357   cvsbuild="yes"
    358   optimize="no"
    359   AC_SUBST(CVSBUILD,[[CVSBUILD=1]])
    360 else
    361   cvsbuild="no"
    362   optimize="yes"
    363 fi
    364 
    365 dnl===-----------------------------------------------------------------------===
    366 dnl===
    367 dnl=== SECTION 3: Command line arguments for the configure script.
    368 dnl===
    369 dnl===-----------------------------------------------------------------------===
    370 
    371 dnl --enable-libcpp : check whether or not to use libc++ on the command line
    372 AC_ARG_ENABLE(libcpp,
    373               AS_HELP_STRING([--enable-libcpp],
    374                              [Use libc++ if available (default is NO)]),,
    375                              enableval=default)
    376 case "$enableval" in
    377   yes) AC_SUBST(ENABLE_LIBCPP,[1]) ;;
    378   no)  AC_SUBST(ENABLE_LIBCPP,[0]) ;;
    379   default) AC_SUBST(ENABLE_LIBCPP,[0]);;
    380   *) AC_MSG_ERROR([Invalid setting for --enable-libcpp. Use "yes" or "no"]) ;;
    381 esac
    382 
    383 dnl --enable-optimized : check whether they want to do an optimized build:
    384 AC_ARG_ENABLE(optimized, AS_HELP_STRING(
    385  --enable-optimized,[Compile with optimizations enabled (default is NO)]),,enableval=$optimize)
    386 if test ${enableval} = "no" ; then
    387   AC_SUBST(ENABLE_OPTIMIZED,[[]])
    388 else
    389   AC_SUBST(ENABLE_OPTIMIZED,[[ENABLE_OPTIMIZED=1]])
    390 fi
    391 
    392 dnl --enable-profiling : check whether they want to do a profile build:
    393 AC_ARG_ENABLE(profiling, AS_HELP_STRING(
    394  --enable-profiling,[Compile with profiling enabled (default is NO)]),,enableval="no")
    395 if test ${enableval} = "no" ; then
    396   AC_SUBST(ENABLE_PROFILING,[[]])
    397 else
    398   AC_SUBST(ENABLE_PROFILING,[[ENABLE_PROFILING=1]])
    399 fi
    400 
    401 dnl --enable-assertions : check whether they want to turn on assertions or not:
    402 AC_ARG_ENABLE(assertions,AS_HELP_STRING(
    403   --enable-assertions,[Compile with assertion checks enabled (default is YES)]),, enableval="yes")
    404 if test ${enableval} = "yes" ; then
    405   AC_SUBST(DISABLE_ASSERTIONS,[[]])
    406 else
    407   AC_SUBST(DISABLE_ASSERTIONS,[[DISABLE_ASSERTIONS=1]])
    408 fi
    409 
    410 dnl --enable-expensive-checks : check whether they want to turn on expensive debug checks:
    411 AC_ARG_ENABLE(expensive-checks,AS_HELP_STRING(
    412   --enable-expensive-checks,[Compile with expensive debug checks enabled (default is NO)]),, enableval="no")
    413 if test ${enableval} = "yes" ; then
    414   AC_SUBST(ENABLE_EXPENSIVE_CHECKS,[[ENABLE_EXPENSIVE_CHECKS=1]])
    415   AC_SUBST(EXPENSIVE_CHECKS,[[yes]])
    416 else
    417   AC_SUBST(ENABLE_EXPENSIVE_CHECKS,[[]])
    418   AC_SUBST(EXPENSIVE_CHECKS,[[no]])
    419 fi
    420 
    421 dnl --enable-debug-runtime : should runtime libraries have debug symbols?
    422 AC_ARG_ENABLE(debug-runtime,
    423    AS_HELP_STRING(--enable-debug-runtime,[Build runtime libs with debug symbols (default is NO)]),,enableval=no)
    424 if test ${enableval} = "no" ; then
    425   AC_SUBST(DEBUG_RUNTIME,[[]])
    426 else
    427   AC_SUBST(DEBUG_RUNTIME,[[DEBUG_RUNTIME=1]])
    428 fi
    429 
    430 dnl --enable-debug-symbols : should even optimized compiler libraries
    431 dnl have debug symbols?
    432 AC_ARG_ENABLE(debug-symbols,
    433    AS_HELP_STRING(--enable-debug-symbols,[Build compiler with debug symbols (default is NO if optimization is on and YES if it's off)]),,enableval=no)
    434 if test ${enableval} = "no" ; then
    435   AC_SUBST(DEBUG_SYMBOLS,[[]])
    436 else
    437   AC_SUBST(DEBUG_SYMBOLS,[[DEBUG_SYMBOLS=1]])
    438 fi
    439 
    440 dnl --enable-jit: check whether they want to enable the jit
    441 AC_ARG_ENABLE(jit,
    442   AS_HELP_STRING(--enable-jit,
    443                  [Enable Just In Time Compiling (default is YES)]),,
    444   enableval=default)
    445 if test ${enableval} = "no"
    446 then
    447   AC_SUBST(JIT,[[]])
    448 else
    449   case "$llvm_cv_target_arch" in
    450     x86)         AC_SUBST(TARGET_HAS_JIT,1) ;;
    451     Sparc)       AC_SUBST(TARGET_HAS_JIT,0) ;;
    452     PowerPC)     AC_SUBST(TARGET_HAS_JIT,1) ;;
    453     x86_64)      AC_SUBST(TARGET_HAS_JIT,1) ;;
    454     ARM)         AC_SUBST(TARGET_HAS_JIT,1) ;;
    455     Mips)        AC_SUBST(TARGET_HAS_JIT,1) ;;
    456     XCore)       AC_SUBST(TARGET_HAS_JIT,0) ;;
    457     MSP430)      AC_SUBST(TARGET_HAS_JIT,0) ;;
    458     Hexagon)     AC_SUBST(TARGET_HAS_JIT,0) ;;
    459     MBlaze)      AC_SUBST(TARGET_HAS_JIT,0) ;;
    460     NVPTX)       AC_SUBST(TARGET_HAS_JIT,0) ;;
    461     *)           AC_SUBST(TARGET_HAS_JIT,0) ;;
    462   esac
    463 fi
    464 
    465 dnl Allow enablement of building and installing docs
    466 AC_ARG_ENABLE(docs,
    467               AS_HELP_STRING([--enable-docs],
    468                              [Build documents (default is YES)]),,
    469                              enableval=default)
    470 case "$enableval" in
    471   yes) AC_SUBST(ENABLE_DOCS,[1]) ;;
    472   no)  AC_SUBST(ENABLE_DOCS,[0]) ;;
    473   default) AC_SUBST(ENABLE_DOCS,[1]) ;;
    474   *) AC_MSG_ERROR([Invalid setting for --enable-docs. Use "yes" or "no"]) ;;
    475 esac
    476 
    477 dnl Allow enablement of doxygen generated documentation
    478 AC_ARG_ENABLE(doxygen,
    479               AS_HELP_STRING([--enable-doxygen],
    480                              [Build doxygen documentation (default is NO)]),,
    481                              enableval=default)
    482 case "$enableval" in
    483   yes) AC_SUBST(ENABLE_DOXYGEN,[1]) ;;
    484   no)  AC_SUBST(ENABLE_DOXYGEN,[0]) ;;
    485   default) AC_SUBST(ENABLE_DOXYGEN,[0]) ;;
    486   *) AC_MSG_ERROR([Invalid setting for --enable-doxygen. Use "yes" or "no"]) ;;
    487 esac
    488 
    489 dnl Allow disablement of threads
    490 AC_ARG_ENABLE(threads,
    491               AS_HELP_STRING([--enable-threads],
    492                              [Use threads if available (default is YES)]),,
    493                              enableval=default)
    494 case "$enableval" in
    495   yes) AC_SUBST(ENABLE_THREADS,[1]) ;;
    496   no)  AC_SUBST(ENABLE_THREADS,[0]) ;;
    497   default) AC_SUBST(ENABLE_THREADS,[1]) ;;
    498   *) AC_MSG_ERROR([Invalid setting for --enable-threads. Use "yes" or "no"]) ;;
    499 esac
    500 AC_DEFINE_UNQUOTED([ENABLE_THREADS],$ENABLE_THREADS,[Define if threads enabled])
    501 
    502 dnl Allow disablement of pthread.h
    503 AC_ARG_ENABLE(pthreads,
    504               AS_HELP_STRING([--enable-pthreads],
    505                              [Use pthreads if available (default is YES)]),,
    506                              enableval=default)
    507 case "$enableval" in
    508   yes) AC_SUBST(ENABLE_PTHREADS,[1]) ;;
    509   no)  AC_SUBST(ENABLE_PTHREADS,[0]) ;;
    510   default) AC_SUBST(ENABLE_PTHREADS,[1]) ;;
    511   *) AC_MSG_ERROR([Invalid setting for --enable-pthreads. Use "yes" or "no"]) ;;
    512 esac
    513 
    514 dnl Allow building without position independent code
    515 AC_ARG_ENABLE(pic,
    516   AS_HELP_STRING([--enable-pic],
    517                  [Build LLVM with Position Independent Code (default is YES)]),,
    518                  enableval=default)
    519 case "$enableval" in
    520   yes) AC_SUBST(ENABLE_PIC,[1]) ;;
    521   no)  AC_SUBST(ENABLE_PIC,[0]) ;;
    522   default) AC_SUBST(ENABLE_PIC,[1]) ;;
    523   *) AC_MSG_ERROR([Invalid setting for --enable-pic. Use "yes" or "no"]) ;;
    524 esac
    525 AC_DEFINE_UNQUOTED([ENABLE_PIC],$ENABLE_PIC,
    526                    [Define if position independent code is enabled])
    527 
    528 dnl Allow building a shared library and linking tools against it.
    529 AC_ARG_ENABLE(shared,
    530   AS_HELP_STRING([--enable-shared],
    531                  [Build a shared library and link tools against it (default is NO)]),,
    532                  enableval=default)
    533 case "$enableval" in
    534   yes) AC_SUBST(ENABLE_SHARED,[1]) ;;
    535   no)  AC_SUBST(ENABLE_SHARED,[0]) ;;
    536   default) AC_SUBST(ENABLE_SHARED,[0]) ;;
    537   *) AC_MSG_ERROR([Invalid setting for --enable-shared. Use "yes" or "no"]) ;;
    538 esac
    539 
    540 dnl Allow libstdc++ is embedded in LLVM.dll.
    541 AC_ARG_ENABLE(embed-stdcxx,
    542   AS_HELP_STRING([--enable-embed-stdcxx],
    543                  [Build a shared library with embedded libstdc++ for Win32 DLL (default is YES)]),,
    544                  enableval=default)
    545 case "$enableval" in
    546   yes) AC_SUBST(ENABLE_EMBED_STDCXX,[1]) ;;
    547   no)  AC_SUBST(ENABLE_EMBED_STDCXX,[0]) ;;
    548   default) AC_SUBST(ENABLE_EMBED_STDCXX,[1]) ;;
    549   *) AC_MSG_ERROR([Invalid setting for --enable-embed-stdcxx. Use "yes" or "no"]) ;;
    550 esac
    551 
    552 dnl Enable embedding timestamp information into build.
    553 AC_ARG_ENABLE(timestamps,
    554   AS_HELP_STRING([--enable-timestamps],
    555                  [Enable embedding timestamp information in build (default is YES)]),,
    556                  enableval=default)
    557 case "$enableval" in
    558   yes) AC_SUBST(ENABLE_TIMESTAMPS,[1]) ;;
    559   no)  AC_SUBST(ENABLE_TIMESTAMPS,[0]) ;;
    560   default) AC_SUBST(ENABLE_TIMESTAMPS,[1]) ;;
    561   *) AC_MSG_ERROR([Invalid setting for --enable-timestamps. Use "yes" or "no"]) ;;
    562 esac
    563 AC_DEFINE_UNQUOTED([ENABLE_TIMESTAMPS],$ENABLE_TIMESTAMPS,
    564                    [Define if timestamp information (e.g., __DATE___) is allowed])
    565 
    566 dnl Allow specific targets to be specified for building (or not)
    567 TARGETS_TO_BUILD=""
    568 AC_ARG_ENABLE([targets],AS_HELP_STRING([--enable-targets],
    569     [Build specific host targets: all or target1,target2,... Valid targets are:
    570      host, x86, x86_64, sparc, powerpc, arm, mips, spu, hexagon,
    571      xcore, msp430, nvptx, cbe, and cpp (default=all)]),,
    572     enableval=all)
    573 if test "$enableval" = host-only ; then
    574   enableval=host
    575 fi
    576 case "$enableval" in
    577   all) TARGETS_TO_BUILD="X86 Sparc PowerPC ARM Mips CellSPU XCore MSP430 Hexagon CppBackend MBlaze NVPTX" ;;
    578   *)for a_target in `echo $enableval|sed -e 's/,/ /g' ` ; do
    579       case "$a_target" in
    580         x86)      TARGETS_TO_BUILD="X86 $TARGETS_TO_BUILD" ;;
    581         x86_64)   TARGETS_TO_BUILD="X86 $TARGETS_TO_BUILD" ;;
    582         sparc)    TARGETS_TO_BUILD="Sparc $TARGETS_TO_BUILD" ;;
    583         powerpc)  TARGETS_TO_BUILD="PowerPC $TARGETS_TO_BUILD" ;;
    584         arm)      TARGETS_TO_BUILD="ARM $TARGETS_TO_BUILD" ;;
    585         mips)     TARGETS_TO_BUILD="Mips $TARGETS_TO_BUILD" ;;
    586         spu)      TARGETS_TO_BUILD="CellSPU $TARGETS_TO_BUILD" ;;
    587         xcore)    TARGETS_TO_BUILD="XCore $TARGETS_TO_BUILD" ;;
    588         msp430)   TARGETS_TO_BUILD="MSP430 $TARGETS_TO_BUILD" ;;
    589         hexagon)  TARGETS_TO_BUILD="Hexagon $TARGETS_TO_BUILD" ;;
    590         cpp)      TARGETS_TO_BUILD="CppBackend $TARGETS_TO_BUILD" ;;
    591         mblaze)   TARGETS_TO_BUILD="MBlaze $TARGETS_TO_BUILD" ;;
    592         nvptx)    TARGETS_TO_BUILD="NVPTX $TARGETS_TO_BUILD" ;;
    593         host) case "$llvm_cv_target_arch" in
    594             x86)         TARGETS_TO_BUILD="X86 $TARGETS_TO_BUILD" ;;
    595             x86_64)      TARGETS_TO_BUILD="X86 $TARGETS_TO_BUILD" ;;
    596             Sparc)       TARGETS_TO_BUILD="Sparc $TARGETS_TO_BUILD" ;;
    597             PowerPC)     TARGETS_TO_BUILD="PowerPC $TARGETS_TO_BUILD" ;;
    598             ARM)         TARGETS_TO_BUILD="ARM $TARGETS_TO_BUILD" ;;
    599             Mips)        TARGETS_TO_BUILD="Mips $TARGETS_TO_BUILD" ;;
    600             MBlaze)      TARGETS_TO_BUILD="MBlaze $TARGETS_TO_BUILD" ;;
    601             CellSPU|SPU) TARGETS_TO_BUILD="CellSPU $TARGETS_TO_BUILD" ;;
    602             XCore)       TARGETS_TO_BUILD="XCore $TARGETS_TO_BUILD" ;;
    603             MSP430)      TARGETS_TO_BUILD="MSP430 $TARGETS_TO_BUILD" ;;
    604             Hexagon)     TARGETS_TO_BUILD="Hexagon $TARGETS_TO_BUILD" ;;
    605             NVPTX)       TARGETS_TO_BUILD="NVPTX $TARGETS_TO_BUILD" ;;
    606             *)       AC_MSG_ERROR([Can not set target to build]) ;;
    607           esac ;;
    608         *) AC_MSG_ERROR([Unrecognized target $a_target]) ;;
    609       esac
    610   done
    611   ;;
    612 esac
    613 AC_SUBST(TARGETS_TO_BUILD,$TARGETS_TO_BUILD)
    614 
    615 # Determine whether we are building LLVM support for the native architecture.
    616 # If so, define LLVM_NATIVE_ARCH to that LLVM target.
    617 for a_target in $TARGETS_TO_BUILD; do
    618   if test "$a_target" = "$LLVM_NATIVE_ARCH"; then
    619     AC_DEFINE_UNQUOTED(LLVM_NATIVE_ARCH, $LLVM_NATIVE_ARCH,
    620       [LLVM architecture name for the native architecture, if available])
    621     LLVM_NATIVE_TARGET="LLVMInitialize${LLVM_NATIVE_ARCH}Target"
    622     LLVM_NATIVE_TARGETINFO="LLVMInitialize${LLVM_NATIVE_ARCH}TargetInfo"
    623     LLVM_NATIVE_TARGETMC="LLVMInitialize${LLVM_NATIVE_ARCH}TargetMC"
    624     LLVM_NATIVE_ASMPRINTER="LLVMInitialize${LLVM_NATIVE_ARCH}AsmPrinter"
    625     if test -f ${srcdir}/lib/Target/${LLVM_NATIVE_ARCH}/AsmParser/Makefile ; then
    626       LLVM_NATIVE_ASMPARSER="LLVMInitialize${LLVM_NATIVE_ARCH}AsmParser"
    627     fi
    628     if test -f ${srcdir}/lib/Target/${LLVM_NATIVE_ARCH}/Disassembler/Makefile ; then
    629       LLVM_NATIVE_DISASSEMBLER="LLVMInitialize${LLVM_NATIVE_ARCH}Disassembler"
    630     fi
    631     AC_DEFINE_UNQUOTED(LLVM_NATIVE_TARGET, $LLVM_NATIVE_TARGET,
    632       [LLVM name for the native Target init function, if available])
    633     AC_DEFINE_UNQUOTED(LLVM_NATIVE_TARGETINFO, $LLVM_NATIVE_TARGETINFO,
    634       [LLVM name for the native TargetInfo init function, if available])
    635     AC_DEFINE_UNQUOTED(LLVM_NATIVE_TARGETMC, $LLVM_NATIVE_TARGETMC,
    636       [LLVM name for the native target MC init function, if available])
    637     AC_DEFINE_UNQUOTED(LLVM_NATIVE_ASMPRINTER, $LLVM_NATIVE_ASMPRINTER,
    638       [LLVM name for the native AsmPrinter init function, if available])
    639     if test -f ${srcdir}/lib/Target/${LLVM_NATIVE_ARCH}/AsmParser/Makefile ; then
    640       AC_DEFINE_UNQUOTED(LLVM_NATIVE_ASMPARSER, $LLVM_NATIVE_ASMPARSER,
    641        [LLVM name for the native AsmParser init function, if available])
    642     fi
    643     if test -f ${srcdir}/lib/Target/${LLVM_NATIVE_ARCH}/Disassembler/Makefile ; then
    644       AC_DEFINE_UNQUOTED(LLVM_NATIVE_DISASSEMBLER, $LLVM_NATIVE_DISASSEMBLER,
    645        [LLVM name for the native Disassembler init function, if available])
    646     fi
    647   fi
    648 done
    649 
    650 # Build the LLVM_TARGET and LLVM_... macros for Targets.def and the individual
    651 # target feature def files.
    652 LLVM_ENUM_TARGETS=""
    653 LLVM_ENUM_ASM_PRINTERS=""
    654 LLVM_ENUM_ASM_PARSERS=""
    655 LLVM_ENUM_DISASSEMBLERS=""
    656 for target_to_build in $TARGETS_TO_BUILD; do
    657   LLVM_ENUM_TARGETS="LLVM_TARGET($target_to_build) $LLVM_ENUM_TARGETS"
    658   if test -f ${srcdir}/lib/Target/${target_to_build}/*AsmPrinter.cpp ; then
    659     LLVM_ENUM_ASM_PRINTERS="LLVM_ASM_PRINTER($target_to_build) $LLVM_ENUM_ASM_PRINTERS";
    660   fi
    661   if test -f ${srcdir}/lib/Target/${target_to_build}/AsmParser/Makefile ; then
    662     LLVM_ENUM_ASM_PARSERS="LLVM_ASM_PARSER($target_to_build) $LLVM_ENUM_ASM_PARSERS";
    663   fi
    664   if test -f ${srcdir}/lib/Target/${target_to_build}/Disassembler/Makefile ; then
    665     LLVM_ENUM_DISASSEMBLERS="LLVM_DISASSEMBLER($target_to_build) $LLVM_ENUM_DISASSEMBLERS";
    666   fi
    667 done
    668 AC_SUBST(LLVM_ENUM_TARGETS)
    669 AC_SUBST(LLVM_ENUM_ASM_PRINTERS)
    670 AC_SUBST(LLVM_ENUM_ASM_PARSERS)
    671 AC_SUBST(LLVM_ENUM_DISASSEMBLERS)
    672 
    673 dnl Override the option to use for optimized builds.
    674 AC_ARG_WITH(optimize-option,
    675   AS_HELP_STRING([--with-optimize-option],
    676                  [Select the compiler options to use for optimized builds]),,
    677                  withval=default)
    678 AC_MSG_CHECKING([optimization flags])
    679 case "$withval" in
    680   default)
    681     case "$llvm_cv_os_type" in
    682     FreeBSD) optimize_option=-O2 ;;
    683     MingW) optimize_option=-O2 ;;
    684     *)     optimize_option=-O3 ;;
    685     esac ;;
    686   *) optimize_option="$withval" ;;
    687 esac
    688 AC_SUBST(OPTIMIZE_OPTION,$optimize_option)
    689 AC_MSG_RESULT([$optimize_option])
    690 
    691 dnl Specify extra build options
    692 AC_ARG_WITH(extra-options,
    693   AS_HELP_STRING([--with-extra-options],
    694                  [Specify additional options to compile LLVM with]),,
    695                  withval=default)
    696 case "$withval" in
    697   default) EXTRA_OPTIONS= ;;
    698   *) EXTRA_OPTIONS=$withval ;;
    699 esac
    700 AC_SUBST(EXTRA_OPTIONS,$EXTRA_OPTIONS)
    701 
    702 dnl Specify extra linker build options
    703 AC_ARG_WITH(extra-ld-options,
    704   AS_HELP_STRING([--with-extra-ld-options],
    705                  [Specify additional options to link LLVM with]),,
    706                  withval=default)
    707 case "$withval" in
    708   default) EXTRA_LD_OPTIONS= ;;
    709   *) EXTRA_LD_OPTIONS=$withval ;;
    710 esac
    711 AC_SUBST(EXTRA_LD_OPTIONS,$EXTRA_LD_OPTIONS)
    712 
    713 dnl Allow specific bindings to be specified for building (or not)
    714 AC_ARG_ENABLE([bindings],AS_HELP_STRING([--enable-bindings],
    715     [Build specific language bindings: all,auto,none,{binding-name} (default=auto)]),,
    716     enableval=default)
    717 BINDINGS_TO_BUILD=""
    718 case "$enableval" in
    719   yes | default | auto) BINDINGS_TO_BUILD="auto" ;;
    720   all ) BINDINGS_TO_BUILD="ocaml" ;;
    721   none | no) BINDINGS_TO_BUILD="" ;;
    722   *)for a_binding in `echo $enableval|sed -e 's/,/ /g' ` ; do
    723       case "$a_binding" in
    724         ocaml) BINDINGS_TO_BUILD="ocaml $BINDINGS_TO_BUILD" ;;
    725         *) AC_MSG_ERROR([Unrecognized binding $a_binding]) ;;
    726       esac
    727   done
    728   ;;
    729 esac
    730 
    731 dnl Allow the ocaml libdir to be overridden. This could go in a configure
    732 dnl script for bindings/ocaml/configure, except that its auto value depends on
    733 dnl OCAMLC, which is found here to support tests.
    734 AC_ARG_WITH([ocaml-libdir],
    735   [AS_HELP_STRING([--with-ocaml-libdir],
    736     [Specify install location for ocaml bindings (default is stdlib)])],
    737   [],
    738   [withval=auto])
    739 case "$withval" in
    740   auto) with_ocaml_libdir="$withval" ;;
    741   /* | [[A-Za-z]]:[[\\/]]*) with_ocaml_libdir="$withval" ;;
    742   *) AC_MSG_ERROR([Invalid path for --with-ocaml-libdir. Provide full path]) ;;
    743 esac
    744 
    745 AC_ARG_WITH(clang-resource-dir,
    746   AS_HELP_STRING([--with-clang-resource-dir],
    747     [Relative directory from the Clang binary for resource files]),,
    748     withval="")
    749 AC_DEFINE_UNQUOTED(CLANG_RESOURCE_DIR,"$withval",
    750                    [Relative directory for resource files])
    751 
    752 AC_ARG_WITH(c-include-dirs,
    753   AS_HELP_STRING([--with-c-include-dirs],
    754     [Colon separated list of directories clang will search for headers]),,
    755     withval="")
    756 AC_DEFINE_UNQUOTED(C_INCLUDE_DIRS,"$withval",
    757                    [Directories clang will search for headers])
    758 
    759 # Clang normally uses the system c++ headers and libraries. With this option,
    760 # clang will use the ones provided by a gcc installation instead. This option should
    761 # be passed the same value that was used with --prefix when configuring gcc.
    762 AC_ARG_WITH(gcc-toolchain,
    763   AS_HELP_STRING([--with-gcc-toolchain],
    764     [Directory where gcc is installed.]),,
    765     withval="")
    766 AC_DEFINE_UNQUOTED(GCC_INSTALL_PREFIX,"$withval",
    767                    [Directory where gcc is installed.])
    768 
    769 dnl Allow linking of LLVM with GPLv3 binutils code.
    770 AC_ARG_WITH(binutils-include,
    771   AS_HELP_STRING([--with-binutils-include],
    772     [Specify path to binutils/include/ containing plugin-api.h file for gold plugin.]),,
    773   withval=default)
    774 case "$withval" in
    775   default) WITH_BINUTILS_INCDIR=default ;;
    776   /* | [[A-Za-z]]:[[\\/]]*)      WITH_BINUTILS_INCDIR=$withval ;;
    777   *) AC_MSG_ERROR([Invalid path for --with-binutils-include. Provide full path]) ;;
    778 esac
    779 if test "x$WITH_BINUTILS_INCDIR" != xdefault ; then
    780   AC_SUBST(BINUTILS_INCDIR,$WITH_BINUTILS_INCDIR)
    781   if test ! -f "$WITH_BINUTILS_INCDIR/plugin-api.h"; then
    782      echo "$WITH_BINUTILS_INCDIR/plugin-api.h"
    783      AC_MSG_ERROR([Invalid path to directory containing plugin-api.h.]);
    784   fi
    785 fi
    786 
    787 dnl Specify the URL where bug reports should be submitted.
    788 AC_ARG_WITH(bug-report-url,
    789   AS_HELP_STRING([--with-bug-report-url],
    790     [Specify the URL where bug reports should be submitted (default=http://llvm.org/bugs/)]),,
    791     withval="http://llvm.org/bugs/")
    792 AC_DEFINE_UNQUOTED(BUG_REPORT_URL,"$withval",
    793                    [Bug report URL.])
    794 
    795 dnl --enable-libffi : check whether the user wants to turn off libffi:
    796 AC_ARG_ENABLE(libffi,AS_HELP_STRING(
    797   --enable-libffi,[Check for the presence of libffi (default is NO)]),
    798   [case "$enableval" in
    799     yes) llvm_cv_enable_libffi="yes" ;;
    800     no)  llvm_cv_enable_libffi="no"  ;;
    801     *) AC_MSG_ERROR([Invalid setting for --enable-libffi. Use "yes" or "no"]) ;;
    802   esac],
    803   llvm_cv_enable_libffi=no)
    804 
    805 dnl===-----------------------------------------------------------------------===
    806 dnl===
    807 dnl=== SECTION 4: Check for programs we need and that they are the right version
    808 dnl===
    809 dnl===-----------------------------------------------------------------------===
    810 
    811 AC_PROG_NM
    812 AC_SUBST(NM)
    813 
    814 dnl Check for the tools that the makefiles require
    815 AC_CHECK_GNU_MAKE
    816 AC_PROG_LN_S
    817 AC_PATH_PROG(CMP, [cmp], [cmp])
    818 AC_PATH_PROG(CP, [cp], [cp])
    819 AC_PATH_PROG(DATE, [date], [date])
    820 AC_PATH_PROG(FIND, [find], [find])
    821 AC_PATH_PROG(GREP, [grep], [grep])
    822 AC_PATH_PROG(MKDIR,[mkdir],[mkdir])
    823 AC_PATH_PROG(MV,   [mv],   [mv])
    824 AC_PROG_RANLIB
    825 AC_CHECK_TOOL(AR, ar, false)
    826 AC_PATH_PROG(RM,   [rm],   [rm])
    827 AC_PATH_PROG(SED,  [sed],  [sed])
    828 AC_PATH_PROG(TAR,  [tar],  [gtar])
    829 AC_PATH_PROG(BINPWD,[pwd],  [pwd])
    830 
    831 dnl Looking for misc. graph plotting software
    832 AC_PATH_PROG(GRAPHVIZ, [Graphviz], [echo Graphviz])
    833 if test "$GRAPHVIZ" != "echo Graphviz" ; then
    834   AC_DEFINE([HAVE_GRAPHVIZ],[1],[Define if the Graphviz program is available])
    835   dnl If we're targeting for mingw we should emit windows paths, not msys
    836   if test "$llvm_cv_os_type" = "MingW" ; then
    837     GRAPHVIZ=`echo $GRAPHVIZ | sed 's/^\/\([[A-Za-z]]\)\//\1:\//' `
    838   fi
    839   AC_DEFINE_UNQUOTED([LLVM_PATH_GRAPHVIZ],"$GRAPHVIZ${EXEEXT}",
    840    [Define to path to Graphviz program if found or 'echo Graphviz' otherwise])
    841 fi
    842 AC_PATH_PROG(DOT, [dot], [echo dot])
    843 if test "$DOT" != "echo dot" ; then
    844   AC_DEFINE([HAVE_DOT],[1],[Define if the dot program is available])
    845   dnl If we're targeting for mingw we should emit windows paths, not msys
    846   if test "$llvm_cv_os_type" = "MingW" ; then
    847     DOT=`echo $DOT | sed 's/^\/\([[A-Za-z]]\)\//\1:\//' `
    848   fi
    849   AC_DEFINE_UNQUOTED([LLVM_PATH_DOT],"$DOT${EXEEXT}",
    850    [Define to path to dot program if found or 'echo dot' otherwise])
    851 fi
    852 AC_PATH_PROG(FDP, [fdp], [echo fdp])
    853 if test "$FDP" != "echo fdp" ; then
    854   AC_DEFINE([HAVE_FDP],[1],[Define if the neat program is available])
    855   dnl If we're targeting for mingw we should emit windows paths, not msys
    856   if test "$llvm_cv_os_type" = "MingW" ; then
    857     FDP=`echo $FDP | sed 's/^\/\([[A-Za-z]]\)\//\1:\//' `
    858   fi
    859   AC_DEFINE_UNQUOTED([LLVM_PATH_FDP],"$FDP${EXEEXT}",
    860    [Define to path to fdp program if found or 'echo fdp' otherwise])
    861 fi
    862 AC_PATH_PROG(NEATO, [neato], [echo neato])
    863 if test "$NEATO" != "echo neato" ; then
    864   AC_DEFINE([HAVE_NEATO],[1],[Define if the neat program is available])
    865   dnl If we're targeting for mingw we should emit windows paths, not msys
    866   if test "$llvm_cv_os_type" = "MingW" ; then
    867     NEATO=`echo $NEATO | sed 's/^\/\([[A-Za-z]]\)\//\1:\//' `
    868   fi
    869   AC_DEFINE_UNQUOTED([LLVM_PATH_NEATO],"$NEATO${EXEEXT}",
    870    [Define to path to neato program if found or 'echo neato' otherwise])
    871 fi
    872 AC_PATH_PROG(TWOPI, [twopi], [echo twopi])
    873 if test "$TWOPI" != "echo twopi" ; then
    874   AC_DEFINE([HAVE_TWOPI],[1],[Define if the neat program is available])
    875   dnl If we're targeting for mingw we should emit windows paths, not msys
    876   if test "$llvm_cv_os_type" = "MingW" ; then
    877     TWOPI=`echo $TWOPI | sed 's/^\/\([[A-Za-z]]\)\//\1:\//' `
    878   fi
    879   AC_DEFINE_UNQUOTED([LLVM_PATH_TWOPI],"$TWOPI${EXEEXT}",
    880    [Define to path to twopi program if found or 'echo twopi' otherwise])
    881 fi
    882 AC_PATH_PROG(CIRCO, [circo], [echo circo])
    883 if test "$CIRCO" != "echo circo" ; then
    884   AC_DEFINE([HAVE_CIRCO],[1],[Define if the neat program is available])
    885   dnl If we're targeting for mingw we should emit windows paths, not msys
    886   if test "$llvm_cv_os_type" = "MingW" ; then
    887     CIRCO=`echo $CIRCO | sed 's/^\/\([[A-Za-z]]\)\//\1:\//' `
    888   fi
    889   AC_DEFINE_UNQUOTED([LLVM_PATH_CIRCO],"$CIRCO${EXEEXT}",
    890    [Define to path to circo program if found or 'echo circo' otherwise])
    891 fi
    892 AC_PATH_PROGS(GV, [gv gsview32], [echo gv])
    893 if test "$GV" != "echo gv" ; then
    894   AC_DEFINE([HAVE_GV],[1],[Define if the gv program is available])
    895   dnl If we're targeting for mingw we should emit windows paths, not msys
    896   if test "$llvm_cv_os_type" = "MingW" ; then
    897     GV=`echo $GV | sed 's/^\/\([[A-Za-z]]\)\//\1:\//' `
    898   fi
    899   AC_DEFINE_UNQUOTED([LLVM_PATH_GV],"$GV${EXEEXT}",
    900    [Define to path to gv program if found or 'echo gv' otherwise])
    901 fi
    902 AC_PATH_PROG(DOTTY, [dotty], [echo dotty])
    903 if test "$DOTTY" != "echo dotty" ; then
    904   AC_DEFINE([HAVE_DOTTY],[1],[Define if the dotty program is available])
    905   dnl If we're targeting for mingw we should emit windows paths, not msys
    906   if test "$llvm_cv_os_type" = "MingW" ; then
    907     DOTTY=`echo $DOTTY | sed 's/^\/\([[A-Za-z]]\)\//\1:\//' `
    908   fi
    909   AC_DEFINE_UNQUOTED([LLVM_PATH_DOTTY],"$DOTTY${EXEEXT}",
    910    [Define to path to dotty program if found or 'echo dotty' otherwise])
    911 fi
    912 AC_PATH_PROG(XDOT_PY, [xdot.py], [echo xdot.py])
    913 if test "$XDOT_PY" != "echo xdot.py" ; then
    914   AC_DEFINE([HAVE_XDOT_PY],[1],[Define if the xdot.py program is available])
    915   dnl If we're targeting for mingw we should emit windows paths, not msys
    916   if test "$llvm_cv_os_type" = "MingW" ; then
    917     XDOT_PY=`echo $XDOT_PY | sed 's/^\/\([[A-Za-z]]\)\//\1:\//' `
    918   fi
    919   AC_DEFINE_UNQUOTED([LLVM_PATH_XDOT_PY],"$XDOT_PY${EXEEXT}",
    920    [Define to path to xdot.py program if found or 'echo xdot.py' otherwise])
    921 fi
    922 
    923 dnl Find the install program
    924 AC_PROG_INSTALL
    925 dnl Prepend src dir to install path dir if it's a relative path
    926 dnl This is a hack for installs that take place in something other
    927 dnl than the top level.
    928 case "$INSTALL" in
    929  [[\\/$]]* | ?:[[\\/]]* ) ;;
    930  *)  INSTALL="\\\$(TOPSRCDIR)/$INSTALL" ;;
    931 esac
    932 
    933 dnl Checks for documentation and testing tools that we can do without. If these
    934 dnl are not found then they are set to "true" which always succeeds but does
    935 dnl nothing. This just lets the build output show that we could have done
    936 dnl something if the tool was available.
    937 AC_PATH_PROG(BZIP2, [bzip2])
    938 AC_PATH_PROG(CAT, [cat])
    939 AC_PATH_PROG(DOXYGEN, [doxygen])
    940 AC_PATH_PROG(GROFF, [groff])
    941 AC_PATH_PROG(GZIPBIN, [gzip])
    942 AC_PATH_PROG(POD2HTML, [pod2html])
    943 AC_PATH_PROG(POD2MAN, [pod2man])
    944 AC_PATH_PROG(PDFROFF, [pdfroff])
    945 AC_PATH_PROG(RUNTEST, [runtest])
    946 DJ_AC_PATH_TCLSH
    947 AC_PATH_PROG(ZIP, [zip])
    948 AC_PATH_PROGS(OCAMLC, [ocamlc])
    949 AC_PATH_PROGS(OCAMLOPT, [ocamlopt])
    950 AC_PATH_PROGS(OCAMLDEP, [ocamldep])
    951 AC_PATH_PROGS(OCAMLDOC, [ocamldoc])
    952 AC_PATH_PROGS(GAS, [gas as])
    953 
    954 dnl Get the version of the linker in use.
    955 AC_LINK_GET_VERSION
    956 
    957 dnl Determine whether the linker supports the -R option.
    958 AC_LINK_USE_R
    959 
    960 dnl Determine whether the linker supports the -export-dynamic option.
    961 AC_LINK_EXPORT_DYNAMIC
    962 
    963 dnl Determine whether the linker supports the --version-script option.
    964 AC_LINK_VERSION_SCRIPT
    965 
    966 dnl Check for libtool and the library that has dlopen function (which must come
    967 dnl before the AC_PROG_LIBTOOL check in order to enable dlopening libraries with
    968 dnl libtool).
    969 AC_LIBTOOL_DLOPEN
    970 AC_LIB_LTDL
    971 
    972 AC_MSG_CHECKING([tool compatibility])
    973 
    974 dnl Ensure that compilation tools are GCC or a GNU compatible compiler such as
    975 dnl ICC; we use GCC specific options in the makefiles so the compiler needs
    976 dnl to support those options.
    977 dnl "icc" emits gcc signatures
    978 dnl "icc -no-gcc" emits no gcc signature BUT is still compatible
    979 ICC=no
    980 IXX=no
    981 case $CC in
    982   icc*|icpc*)
    983     ICC=yes
    984     IXX=yes
    985     ;;
    986    *)
    987     ;;
    988 esac
    989 
    990 if test "$GCC" != "yes" && test "$ICC" != "yes"
    991 then
    992   AC_MSG_ERROR([gcc|icc required but not found])
    993 fi
    994 
    995 dnl Ensure that compilation tools are compatible with GCC extensions
    996 if test "$GXX" != "yes" && test "$IXX" != "yes"
    997 then
    998   AC_MSG_ERROR([g++|clang++|icc required but not found])
    999 fi
   1000 
   1001 dnl Verify that GCC is version 3.0 or higher
   1002 if test "$GCC" = "yes"
   1003 then
   1004   AC_COMPILE_IFELSE([[#if !defined(__GNUC__) || __GNUC__ < 3
   1005 #error Unsupported GCC version
   1006 #endif
   1007 ]], [], [AC_MSG_ERROR([gcc 3.x required, but you have a lower version])])
   1008 fi
   1009 
   1010 dnl Check for GNU Make.  We use its extensions, so don't build without it
   1011 if test -z "$llvm_cv_gnu_make_command"
   1012 then
   1013   AC_MSG_ERROR([GNU Make required but not found])
   1014 fi
   1015 
   1016 dnl Tool compatibility is okay if we make it here.
   1017 AC_MSG_RESULT([ok])
   1018 
   1019 dnl Check optional compiler flags.
   1020 AC_MSG_CHECKING([optional compiler flags])
   1021 CXX_FLAG_CHECK(NO_VARIADIC_MACROS, [-Wno-variadic-macros])
   1022 CXX_FLAG_CHECK(NO_MISSING_FIELD_INITIALIZERS, [-Wno-missing-field-initializers])
   1023 CXX_FLAG_CHECK(COVERED_SWITCH_DEFAULT, [-Wcovered-switch-default])
   1024 AC_MSG_RESULT([$NO_VARIADIC_MACROS $NO_MISSING_FIELD_INITIALIZERS $COVERED_SWITCH_DEFAULT])
   1025 
   1026 dnl===-----------------------------------------------------------------------===
   1027 dnl===
   1028 dnl=== SECTION 5: Check for libraries
   1029 dnl===
   1030 dnl===-----------------------------------------------------------------------===
   1031 
   1032 AC_CHECK_LIB(m,sin)
   1033 if test "$llvm_cv_os_type" = "MingW" ; then
   1034   AC_CHECK_LIB(imagehlp, main)
   1035   AC_CHECK_LIB(psapi, main)
   1036 fi
   1037 
   1038 dnl dlopen() is required for plugin support.
   1039 AC_SEARCH_LIBS(dlopen,dl,AC_DEFINE([HAVE_DLOPEN],[1],
   1040                [Define if dlopen() is available on this platform.]),
   1041                AC_MSG_WARN([dlopen() not found - disabling plugin support]))
   1042 
   1043 dnl libffi is optional; used to call external functions from the interpreter
   1044 if test "$llvm_cv_enable_libffi" = "yes" ; then
   1045   AC_SEARCH_LIBS(ffi_call,ffi,AC_DEFINE([HAVE_FFI_CALL],[1],
   1046                  [Define if libffi is available on this platform.]),
   1047                  AC_MSG_ERROR([libffi not found - configure without --enable-libffi to compile without it]))
   1048 fi
   1049 
   1050 dnl mallinfo is optional; the code can compile (minus features) without it
   1051 AC_SEARCH_LIBS(mallinfo,malloc,AC_DEFINE([HAVE_MALLINFO],[1],
   1052                [Define if mallinfo() is available on this platform.]))
   1053 
   1054 dnl pthread locking functions are optional - but llvm will not be thread-safe
   1055 dnl without locks.
   1056 if test "$ENABLE_THREADS" -eq 1 && test "$ENABLE_PTHREADS" -eq 1 ; then
   1057   AC_CHECK_LIB(pthread, pthread_mutex_init)
   1058   AC_SEARCH_LIBS(pthread_mutex_lock,pthread,
   1059                  AC_DEFINE([HAVE_PTHREAD_MUTEX_LOCK],[1],
   1060                            [Have pthread_mutex_lock]))
   1061   AC_SEARCH_LIBS(pthread_rwlock_init,pthread,
   1062                  AC_DEFINE([HAVE_PTHREAD_RWLOCK_INIT],[1],
   1063                  [Have pthread_rwlock_init]))
   1064   AC_SEARCH_LIBS(pthread_getspecific,pthread,
   1065                  AC_DEFINE([HAVE_PTHREAD_GETSPECIFIC],[1],
   1066                  [Have pthread_getspecific]))
   1067 fi
   1068 
   1069 dnl Allow extra x86-disassembler library
   1070 AC_ARG_WITH(udis86,
   1071   AS_HELP_STRING([--with-udis86=<path>],
   1072     [Use udis86 external x86 disassembler library]),
   1073     [
   1074       AC_SUBST(USE_UDIS86, [1])
   1075       case "$withval" in
   1076         /usr/lib|yes) ;;
   1077         *) LDFLAGS="$LDFLAGS -L${withval}" ;;
   1078       esac
   1079       AC_CHECK_LIB(udis86, ud_init, [], [
   1080         echo "Error! You need to have libudis86 around."
   1081         exit -1
   1082       ])
   1083     ],
   1084     AC_SUBST(USE_UDIS86, [0]))
   1085 AC_DEFINE_UNQUOTED([USE_UDIS86],$USE_UDIS86,
   1086                    [Define if use udis86 library])
   1087 
   1088 dnl Allow OProfile support for JIT output.
   1089 AC_ARG_WITH(oprofile,
   1090   AS_HELP_STRING([--with-oprofile=<prefix>],
   1091     [Tell OProfile >= 0.9.4 how to symbolize JIT output]),
   1092     [
   1093       AC_SUBST(USE_OPROFILE, [1])
   1094       case "$withval" in
   1095         /usr|yes) llvm_cv_oppath=/usr/lib/oprofile ;;
   1096         no) llvm_cv_oppath=
   1097             AC_SUBST(USE_OPROFILE, [0]) ;;
   1098         *) llvm_cv_oppath="${withval}/lib/oprofile"
   1099            CPPFLAGS="-I${withval}/include";;
   1100       esac
   1101       if test -n "$llvm_cv_oppath" ; then
   1102         LIBS="$LIBS -L${llvm_cv_oppath} -Wl,-rpath,${llvm_cv_oppath}"
   1103         dnl Work around http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=537744:
   1104         dnl libbfd is not included properly in libopagent in some Debian
   1105         dnl versions.  If libbfd isn't found at all, we assume opagent works
   1106         dnl anyway.
   1107         AC_SEARCH_LIBS(bfd_init, bfd, [], [])
   1108         AC_SEARCH_LIBS(op_open_agent, opagent, [], [
   1109           echo "Error! You need to have libopagent around."
   1110           exit -1
   1111         ])
   1112         AC_CHECK_HEADER([opagent.h], [], [
   1113           echo "Error! You need to have opagent.h around."
   1114           exit -1
   1115           ])
   1116       fi
   1117     ],
   1118     [
   1119       AC_SUBST(USE_OPROFILE, [0])
   1120     ])
   1121 AC_DEFINE_UNQUOTED([USE_OPROFILE],$USE_OPROFILE,
   1122                    [Define if we have the oprofile JIT-support library])
   1123 
   1124 dnl===-----------------------------------------------------------------------===
   1125 dnl===
   1126 dnl=== SECTION 6: Check for header files
   1127 dnl===
   1128 dnl===-----------------------------------------------------------------------===
   1129 
   1130 dnl First, use autoconf provided macros for specific headers that we need
   1131 dnl We don't check for ancient stuff or things that are guaranteed to be there
   1132 dnl by the C++ standard. We always use the <cfoo> versions of <foo.h> C headers.
   1133 dnl Generally we're looking for POSIX headers.
   1134 AC_HEADER_DIRENT
   1135 AC_HEADER_MMAP_ANONYMOUS
   1136 AC_HEADER_STAT
   1137 AC_HEADER_SYS_WAIT
   1138 AC_HEADER_TIME
   1139 
   1140 AC_CHECK_HEADERS([dlfcn.h execinfo.h fcntl.h inttypes.h limits.h link.h])
   1141 AC_CHECK_HEADERS([malloc.h setjmp.h signal.h stdint.h termios.h unistd.h])
   1142 AC_CHECK_HEADERS([utime.h windows.h])
   1143 AC_CHECK_HEADERS([sys/mman.h sys/param.h sys/resource.h sys/time.h sys/uio.h])
   1144 AC_CHECK_HEADERS([sys/types.h sys/ioctl.h malloc/malloc.h mach/mach.h])
   1145 AC_CHECK_HEADERS([valgrind/valgrind.h])
   1146 AC_CHECK_HEADERS([fenv.h])
   1147 if test "$ENABLE_THREADS" -eq 1 && test "$ENABLE_PTHREADS" -eq 1 ; then
   1148   AC_CHECK_HEADERS(pthread.h,
   1149                    AC_SUBST(HAVE_PTHREAD, 1),
   1150                    AC_SUBST(HAVE_PTHREAD, 0))
   1151 else
   1152   AC_SUBST(HAVE_PTHREAD, 0)
   1153 fi
   1154 
   1155 dnl Try to find ffi.h.
   1156 if test "$llvm_cv_enable_libffi" = "yes" ; then
   1157   AC_CHECK_HEADERS([ffi.h ffi/ffi.h])
   1158 fi
   1159 
   1160 dnl Try to find Darwin specific crash reporting libraries.
   1161 AC_CHECK_HEADERS([CrashReporterClient.h])
   1162 
   1163 dnl Try to find Darwin specific crash reporting global.
   1164 AC_MSG_CHECKING([__crashreporter_info__])
   1165 AC_LINK_IFELSE(
   1166   AC_LANG_SOURCE(
   1167     [[extern const char *__crashreporter_info__;
   1168       int main() {
   1169         __crashreporter_info__ = "test";
   1170         return 0;
   1171       }
   1172     ]]),
   1173   AC_MSG_RESULT(yes)
   1174   AC_DEFINE(HAVE_CRASHREPORTER_INFO, 1, Can use __crashreporter_info__),
   1175   AC_MSG_RESULT(no)
   1176   AC_DEFINE(HAVE_CRASHREPORTER_INFO, 0,
   1177             Define if __crashreporter_info__ exists.))
   1178 
   1179 dnl===-----------------------------------------------------------------------===
   1180 dnl===
   1181 dnl=== SECTION 7: Check for types and structures
   1182 dnl===
   1183 dnl===-----------------------------------------------------------------------===
   1184 
   1185 AC_HUGE_VAL_CHECK
   1186 AC_TYPE_PID_T
   1187 AC_TYPE_SIZE_T
   1188 AC_DEFINE_UNQUOTED([RETSIGTYPE],[void],[Define as the return type of signal handlers (`int' or `void').])
   1189 AC_STRUCT_TM
   1190 AC_CHECK_TYPES([int64_t],,AC_MSG_ERROR([Type int64_t required but not found]))
   1191 AC_CHECK_TYPES([uint64_t],,
   1192          AC_CHECK_TYPES([u_int64_t],,
   1193          AC_MSG_ERROR([Type uint64_t or u_int64_t required but not found])))
   1194 
   1195 dnl===-----------------------------------------------------------------------===
   1196 dnl===
   1197 dnl=== SECTION 8: Check for specific functions needed
   1198 dnl===
   1199 dnl===-----------------------------------------------------------------------===
   1200 
   1201 AC_CHECK_FUNCS([backtrace ceilf floorf roundf rintf nearbyintf getcwd ])
   1202 AC_CHECK_FUNCS([powf fmodf strtof round ])
   1203 AC_CHECK_FUNCS([getpagesize getrusage getrlimit setrlimit gettimeofday ])
   1204 AC_CHECK_FUNCS([isatty mkdtemp mkstemp ])
   1205 AC_CHECK_FUNCS([mktemp posix_spawn realpath sbrk setrlimit strdup ])
   1206 AC_CHECK_FUNCS([strerror strerror_r setenv ])
   1207 AC_CHECK_FUNCS([strtoll strtoq sysconf malloc_zone_statistics ])
   1208 AC_CHECK_FUNCS([setjmp longjmp sigsetjmp siglongjmp writev])
   1209 AC_C_PRINTF_A
   1210 AC_FUNC_RAND48
   1211 
   1212 dnl Check the declaration "Secure API" on Windows environments.
   1213 AC_CHECK_DECLS([strerror_s])
   1214 
   1215 dnl Check symbols in libgcc.a for JIT on Mingw.
   1216 if test "$llvm_cv_os_type" = "MingW" ; then
   1217   AC_CHECK_LIB(gcc,_alloca,AC_DEFINE([HAVE__ALLOCA],[1],[Have host's _alloca]))
   1218   AC_CHECK_LIB(gcc,__alloca,AC_DEFINE([HAVE___ALLOCA],[1],[Have host's __alloca]))
   1219   AC_CHECK_LIB(gcc,__chkstk,AC_DEFINE([HAVE___CHKSTK],[1],[Have host's __chkstk]))
   1220   AC_CHECK_LIB(gcc,___chkstk,AC_DEFINE([HAVE____CHKSTK],[1],[Have host's ___chkstk]))
   1221 
   1222   AC_CHECK_LIB(gcc,__ashldi3,AC_DEFINE([HAVE___ASHLDI3],[1],[Have host's __ashldi3]))
   1223   AC_CHECK_LIB(gcc,__ashrdi3,AC_DEFINE([HAVE___ASHRDI3],[1],[Have host's __ashrdi3]))
   1224   AC_CHECK_LIB(gcc,__divdi3,AC_DEFINE([HAVE___DIVDI3],[1],[Have host's __divdi3]))
   1225   AC_CHECK_LIB(gcc,__fixdfdi,AC_DEFINE([HAVE___FIXDFDI],[1],[Have host's __fixdfdi]))
   1226   AC_CHECK_LIB(gcc,__fixsfdi,AC_DEFINE([HAVE___FIXSFDI],[1],[Have host's __fixsfdi]))
   1227   AC_CHECK_LIB(gcc,__floatdidf,AC_DEFINE([HAVE___FLOATDIDF],[1],[Have host's __floatdidf]))
   1228   AC_CHECK_LIB(gcc,__lshrdi3,AC_DEFINE([HAVE___LSHRDI3],[1],[Have host's __lshrdi3]))
   1229   AC_CHECK_LIB(gcc,__moddi3,AC_DEFINE([HAVE___MODDI3],[1],[Have host's __moddi3]))
   1230   AC_CHECK_LIB(gcc,__udivdi3,AC_DEFINE([HAVE___UDIVDI3],[1],[Have host's __udivdi3]))
   1231   AC_CHECK_LIB(gcc,__umoddi3,AC_DEFINE([HAVE___UMODDI3],[1],[Have host's __umoddi3]))
   1232 
   1233   AC_CHECK_LIB(gcc,__main,AC_DEFINE([HAVE___MAIN],[1],[Have host's __main]))
   1234   AC_CHECK_LIB(gcc,__cmpdi2,AC_DEFINE([HAVE___CMPDI2],[1],[Have host's __cmpdi2]))
   1235 fi
   1236 
   1237 dnl Check Win32 API EnumerateLoadedModules.
   1238 if test "$llvm_cv_os_type" = "MingW" ; then
   1239   AC_MSG_CHECKING([whether EnumerateLoadedModules() accepts new decl])
   1240   AC_COMPILE_IFELSE([[#include <windows.h>
   1241 #include <imagehlp.h>
   1242 extern void foo(PENUMLOADED_MODULES_CALLBACK);
   1243 extern void foo(BOOL(CALLBACK*)(PCSTR,ULONG_PTR,ULONG,PVOID));]],
   1244 [
   1245   AC_MSG_RESULT([yes])
   1246   llvm_cv_win32_elmcb_pcstr="PCSTR"
   1247 ],
   1248 [
   1249   AC_MSG_RESULT([no])
   1250   llvm_cv_win32_elmcb_pcstr="PSTR"
   1251 ])
   1252   AC_DEFINE_UNQUOTED([WIN32_ELMCB_PCSTR],$llvm_cv_win32_elmcb_pcstr,[Type of 1st arg on ELM Callback])
   1253 fi
   1254 
   1255 dnl Check for variations in the Standard C++ library and STL. These macros are
   1256 dnl provided by LLVM in the autoconf/m4 directory.
   1257 AC_FUNC_ISNAN
   1258 AC_FUNC_ISINF
   1259 
   1260 dnl Check for mmap support.We also need to know if /dev/zero is required to
   1261 dnl be opened for allocating RWX memory.
   1262 dnl Make sure we aren't attempting to configure for an unknown system
   1263 if test "$llvm_cv_platform_type" = "Unix" ; then
   1264   AC_FUNC_MMAP
   1265   AC_FUNC_MMAP_FILE
   1266   AC_NEED_DEV_ZERO_FOR_MMAP
   1267 
   1268   if test "$ac_cv_func_mmap_fixed_mapped" = "no"
   1269   then
   1270     AC_MSG_WARN([mmap() of a fixed address required but not supported])
   1271   fi
   1272   if test "$ac_cv_func_mmap_file" = "no"
   1273   then
   1274     AC_MSG_WARN([mmap() of files required but not found])
   1275   fi
   1276 fi
   1277 
   1278 dnl atomic builtins are required for threading support.
   1279 AC_MSG_CHECKING(for GCC atomic builtins)
   1280 dnl Since we'll be using these atomic builtins in C++ files we should test
   1281 dnl the C++ compiler.
   1282 AC_LANG_PUSH([C++])
   1283 AC_LINK_IFELSE(
   1284   AC_LANG_SOURCE(
   1285     [[int main() {
   1286         volatile unsigned long val = 1;
   1287         __sync_synchronize();
   1288         __sync_val_compare_and_swap(&val, 1, 0);
   1289         __sync_add_and_fetch(&val, 1);
   1290         __sync_sub_and_fetch(&val, 1);
   1291         return 0;
   1292       }
   1293     ]]),
   1294   AC_LANG_POP([C++])
   1295   AC_MSG_RESULT(yes)
   1296   AC_DEFINE(LLVM_HAS_ATOMICS, 1, Has gcc/MSVC atomic intrinsics),
   1297   AC_MSG_RESULT(no)
   1298   AC_DEFINE(LLVM_HAS_ATOMICS, 0, Has gcc/MSVC atomic intrinsics)
   1299   AC_MSG_WARN([LLVM will be built thread-unsafe because atomic builtins are missing]))
   1300 
   1301 dnl===-----------------------------------------------------------------------===
   1302 dnl===
   1303 dnl=== SECTION 9: Additional checks, variables, etc.
   1304 dnl===
   1305 dnl===-----------------------------------------------------------------------===
   1306 
   1307 dnl Handle 32-bit linux systems running a 64-bit kernel.
   1308 dnl This has to come after section 4 because it invokes the compiler.
   1309 if test "$llvm_cv_os_type" = "Linux" -a "$llvm_cv_target_arch" = "x86_64" ; then
   1310   AC_IS_LINUX_MIXED
   1311   if test "$llvm_cv_linux_mixed" = "yes"; then
   1312     llvm_cv_target_arch="x86"
   1313     ARCH="x86"
   1314   fi
   1315 fi
   1316 
   1317 dnl Check whether __dso_handle is present
   1318 AC_CHECK_FUNCS([__dso_handle])
   1319 
   1320 dnl Propagate the shared library extension that the libltdl checks did to
   1321 dnl the Makefiles so we can use it there too
   1322 AC_SUBST(SHLIBEXT,$libltdl_cv_shlibext)
   1323 
   1324 dnl Propagate the run-time library path variable that the libltdl
   1325 dnl checks found to the Makefiles so we can use it there too
   1326 AC_SUBST(SHLIBPATH_VAR,$libltdl_cv_shlibpath_var)
   1327 
   1328 # Translate the various configuration directories and other basic
   1329 # information into substitutions that will end up in Makefile.config.in
   1330 # that these configured values can be used by the makefiles
   1331 if test "${prefix}" = "NONE" ; then
   1332   prefix="/usr/local"
   1333 fi
   1334 eval LLVM_PREFIX="${prefix}";
   1335 eval LLVM_BINDIR="${prefix}/bin";
   1336 eval LLVM_LIBDIR="${prefix}/lib";
   1337 eval LLVM_DATADIR="${prefix}/share/llvm";
   1338 eval LLVM_DOCSDIR="${prefix}/share/doc/llvm";
   1339 eval LLVM_ETCDIR="${prefix}/etc/llvm";
   1340 eval LLVM_INCLUDEDIR="${prefix}/include";
   1341 eval LLVM_INFODIR="${prefix}/info";
   1342 eval LLVM_MANDIR="${prefix}/man";
   1343 LLVM_CONFIGTIME=`date`
   1344 AC_SUBST(LLVM_PREFIX)
   1345 AC_SUBST(LLVM_BINDIR)
   1346 AC_SUBST(LLVM_LIBDIR)
   1347 AC_SUBST(LLVM_DATADIR)
   1348 AC_SUBST(LLVM_DOCSDIR)
   1349 AC_SUBST(LLVM_ETCDIR)
   1350 AC_SUBST(LLVM_INCLUDEDIR)
   1351 AC_SUBST(LLVM_INFODIR)
   1352 AC_SUBST(LLVM_MANDIR)
   1353 AC_SUBST(LLVM_CONFIGTIME)
   1354 
   1355 # Place the various directores into the config.h file as #defines so that we
   1356 # can know about the installation paths within LLVM.
   1357 AC_DEFINE_UNQUOTED(LLVM_PREFIX,"$LLVM_PREFIX",
   1358                    [Installation prefix directory])
   1359 AC_DEFINE_UNQUOTED(LLVM_BINDIR, "$LLVM_BINDIR",
   1360                    [Installation directory for binary executables])
   1361 AC_DEFINE_UNQUOTED(LLVM_LIBDIR, "$LLVM_LIBDIR",
   1362                    [Installation directory for libraries])
   1363 AC_DEFINE_UNQUOTED(LLVM_DATADIR, "$LLVM_DATADIR",
   1364                    [Installation directory for data files])
   1365 AC_DEFINE_UNQUOTED(LLVM_DOCSDIR, "$LLVM_DOCSDIR",
   1366                    [Installation directory for documentation])
   1367 AC_DEFINE_UNQUOTED(LLVM_ETCDIR, "$LLVM_ETCDIR",
   1368                    [Installation directory for config files])
   1369 AC_DEFINE_UNQUOTED(LLVM_INCLUDEDIR, "$LLVM_INCLUDEDIR",
   1370                    [Installation directory for include files])
   1371 AC_DEFINE_UNQUOTED(LLVM_INFODIR, "$LLVM_INFODIR",
   1372                    [Installation directory for .info files])
   1373 AC_DEFINE_UNQUOTED(LLVM_MANDIR, "$LLVM_MANDIR",
   1374                    [Installation directory for man pages])
   1375 AC_DEFINE_UNQUOTED(LLVM_CONFIGTIME, "$LLVM_CONFIGTIME",
   1376                    [Time at which LLVM was configured])
   1377 AC_DEFINE_UNQUOTED(LLVM_DEFAULT_TARGET_TRIPLE, "$target",
   1378                    [Target triple LLVM will generate code for by default])
   1379 
   1380 # Determine which bindings to build.
   1381 if test "$BINDINGS_TO_BUILD" = auto ; then
   1382   BINDINGS_TO_BUILD=""
   1383   if test "x$OCAMLC" != x -a "x$OCAMLDEP" != x ; then
   1384     BINDINGS_TO_BUILD="ocaml $BINDINGS_TO_BUILD"
   1385   fi
   1386 fi
   1387 AC_SUBST(BINDINGS_TO_BUILD,$BINDINGS_TO_BUILD)
   1388 
   1389 # This isn't really configurey, but it avoids having to repeat the list in
   1390 # other files.
   1391 AC_SUBST(ALL_BINDINGS,ocaml)
   1392 
   1393 # Do any work necessary to ensure that bindings have what they need.
   1394 binding_prereqs_failed=0
   1395 for a_binding in $BINDINGS_TO_BUILD ; do
   1396   case "$a_binding" in
   1397   ocaml)
   1398     if test "x$OCAMLC" = x ; then
   1399       AC_MSG_WARN([--enable-bindings=ocaml specified, but ocamlc not found. Try configure OCAMLC=/path/to/ocamlc])
   1400       binding_prereqs_failed=1
   1401     fi
   1402     if test "x$OCAMLDEP" = x ; then
   1403       AC_MSG_WARN([--enable-bindings=ocaml specified, but ocamldep not found. Try configure OCAMLDEP=/path/to/ocamldep])
   1404       binding_prereqs_failed=1
   1405     fi
   1406     if test "x$OCAMLOPT" = x ; then
   1407       AC_MSG_WARN([--enable-bindings=ocaml specified, but ocamlopt not found. Try configure OCAMLOPT=/path/to/ocamlopt])
   1408       dnl ocamlopt is optional!
   1409     fi
   1410     if test "x$with_ocaml_libdir" != xauto ; then
   1411       AC_SUBST(OCAML_LIBDIR,$with_ocaml_libdir)
   1412     else
   1413       ocaml_stdlib="`"$OCAMLC" -where`"
   1414       if test "$LLVM_PREFIX" '<' "$ocaml_stdlib" -a "$ocaml_stdlib" '<' "$LLVM_PREFIX~"
   1415       then
   1416         # ocaml stdlib is beneath our prefix; use stdlib
   1417         AC_SUBST(OCAML_LIBDIR,$ocaml_stdlib)
   1418       else
   1419         # ocaml stdlib is outside our prefix; use libdir/ocaml
   1420         AC_SUBST(OCAML_LIBDIR,$LLVM_LIBDIR/ocaml)
   1421       fi
   1422     fi
   1423     ;;
   1424   esac
   1425 done
   1426 if test "$binding_prereqs_failed" = 1 ; then
   1427   AC_MSG_ERROR([Prequisites for bindings not satisfied. Fix them or use configure --disable-bindings.])
   1428 fi
   1429 
   1430 dnl Determine whether the compiler supports -fvisibility-inlines-hidden.
   1431 AC_CXX_USE_VISIBILITY_INLINES_HIDDEN
   1432 
   1433 dnl Determine linker rpath flag
   1434 if test "$llvm_cv_link_use_r" = "yes" ; then
   1435   RPATH="-Wl,-R"
   1436 else
   1437   RPATH="-Wl,-rpath"
   1438 fi
   1439 AC_SUBST(RPATH)
   1440 
   1441 dnl Determine linker rdynamic flag
   1442 if test "$llvm_cv_link_use_export_dynamic" = "yes" ; then
   1443   RDYNAMIC="-Wl,-export-dynamic"
   1444 else
   1445   RDYNAMIC=""
   1446 fi
   1447 AC_SUBST(RDYNAMIC)
   1448 
   1449 dnl===-----------------------------------------------------------------------===
   1450 dnl===
   1451 dnl=== SECTION 10: Specify the output files and generate it
   1452 dnl===
   1453 dnl===-----------------------------------------------------------------------===
   1454 
   1455 dnl **************************************************************************
   1456 dnl End LLVM configure.ac Import
   1457 dnl **************************************************************************
   1458 
   1459 dnl Configure a common Makefile
   1460 AC_CONFIG_FILES(Makefile.common)
   1461 AC_CONFIG_FILES(Makefile.llvm.config)
   1462 
   1463 dnl Configure project makefiles
   1464 dnl List every Makefile that exists within your source tree
   1465 AC_CONFIG_MAKEFILE(Makefile)
   1466 AC_CONFIG_MAKEFILE(lib/Makefile)
   1467 AC_CONFIG_MAKEFILE(lib/sample/Makefile)
   1468 AC_CONFIG_MAKEFILE(tools/Makefile)
   1469 AC_CONFIG_MAKEFILE(tools/sample/Makefile)
   1470 
   1471 dnl This must be last
   1472 AC_OUTPUT
   1473