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      1 if( WIN32 AND NOT CYGWIN )
      2   # We consider Cygwin as another Unix
      3   set(PURE_WINDOWS 1)
      4 endif()
      5 
      6 include(CheckIncludeFile)
      7 include(CheckIncludeFileCXX)
      8 include(CheckLibraryExists)
      9 include(CheckSymbolExists)
     10 include(CheckFunctionExists)
     11 include(CheckCXXSourceCompiles)
     12 include(TestBigEndian)
     13 
     14 include(HandleLLVMStdlib)
     15 
     16 if( UNIX AND NOT BEOS )
     17   # Used by check_symbol_exists:
     18   set(CMAKE_REQUIRED_LIBRARIES m)
     19 endif()
     20 # x86_64 FreeBSD 9.2 requires libcxxrt to be specified explicitly.
     21 if( CMAKE_SYSTEM MATCHES "FreeBSD-9.2-RELEASE" AND
     22     CMAKE_SIZEOF_VOID_P EQUAL 8 )
     23   list(APPEND CMAKE_REQUIRED_LIBRARIES "cxxrt")
     24 endif()
     25 
     26 # Helper macros and functions
     27 macro(add_cxx_include result files)
     28   set(${result} "")
     29   foreach (file_name ${files})
     30      set(${result} "${${result}}#include<${file_name}>\n")
     31   endforeach()
     32 endmacro(add_cxx_include files result)
     33 
     34 function(check_type_exists type files variable)
     35   add_cxx_include(includes "${files}")
     36   CHECK_CXX_SOURCE_COMPILES("
     37     ${includes} ${type} typeVar;
     38     int main() {
     39         return 0;
     40     }
     41     " ${variable})
     42 endfunction()
     43 
     44 # include checks
     45 check_include_file(dirent.h HAVE_DIRENT_H)
     46 check_include_file(dlfcn.h HAVE_DLFCN_H)
     47 check_include_file(errno.h HAVE_ERRNO_H)
     48 check_include_file(execinfo.h HAVE_EXECINFO_H)
     49 check_include_file(fcntl.h HAVE_FCNTL_H)
     50 check_include_file(inttypes.h HAVE_INTTYPES_H)
     51 check_include_file(limits.h HAVE_LIMITS_H)
     52 check_include_file(link.h HAVE_LINK_H)
     53 check_include_file(malloc.h HAVE_MALLOC_H)
     54 check_include_file(malloc/malloc.h HAVE_MALLOC_MALLOC_H)
     55 check_include_file(ndir.h HAVE_NDIR_H)
     56 if( NOT PURE_WINDOWS )
     57   check_include_file(pthread.h HAVE_PTHREAD_H)
     58 endif()
     59 check_include_file(signal.h HAVE_SIGNAL_H)
     60 check_include_file(stdint.h HAVE_STDINT_H)
     61 check_include_file(sys/dir.h HAVE_SYS_DIR_H)
     62 check_include_file(sys/ioctl.h HAVE_SYS_IOCTL_H)
     63 check_include_file(sys/mman.h HAVE_SYS_MMAN_H)
     64 check_include_file(sys/ndir.h HAVE_SYS_NDIR_H)
     65 check_include_file(sys/param.h HAVE_SYS_PARAM_H)
     66 check_include_file(sys/resource.h HAVE_SYS_RESOURCE_H)
     67 check_include_file(sys/stat.h HAVE_SYS_STAT_H)
     68 check_include_file(sys/time.h HAVE_SYS_TIME_H)
     69 check_include_file(sys/uio.h HAVE_SYS_UIO_H)
     70 check_include_file(termios.h HAVE_TERMIOS_H)
     71 check_include_file(unistd.h HAVE_UNISTD_H)
     72 check_include_file(utime.h HAVE_UTIME_H)
     73 check_include_file(valgrind/valgrind.h HAVE_VALGRIND_VALGRIND_H)
     74 check_include_file(zlib.h HAVE_ZLIB_H)
     75 check_include_file(fenv.h HAVE_FENV_H)
     76 check_symbol_exists(FE_ALL_EXCEPT "fenv.h" HAVE_DECL_FE_ALL_EXCEPT)
     77 check_symbol_exists(FE_INEXACT "fenv.h" HAVE_DECL_FE_INEXACT)
     78 
     79 check_include_file(mach/mach.h HAVE_MACH_MACH_H)
     80 check_include_file(mach-o/dyld.h HAVE_MACH_O_DYLD_H)
     81 check_include_file(histedit.h HAVE_HISTEDIT_H)
     82 
     83 # size_t must be defined before including cxxabi.h on FreeBSD 10.0.
     84 check_cxx_source_compiles("
     85 #include <stddef.h>
     86 #include <cxxabi.h>
     87 int main() { return 0; }
     88 " HAVE_CXXABI_H)
     89 
     90 # library checks
     91 if( NOT PURE_WINDOWS )
     92   check_library_exists(pthread pthread_create "" HAVE_LIBPTHREAD)
     93   if (HAVE_LIBPTHREAD)
     94     check_library_exists(pthread pthread_getspecific "" HAVE_PTHREAD_GETSPECIFIC)
     95     check_library_exists(pthread pthread_rwlock_init "" HAVE_PTHREAD_RWLOCK_INIT)
     96     check_library_exists(pthread pthread_mutex_lock "" HAVE_PTHREAD_MUTEX_LOCK)
     97   else()
     98     # this could be Android
     99     check_library_exists(c pthread_create "" PTHREAD_IN_LIBC)
    100     if (PTHREAD_IN_LIBC)
    101       check_library_exists(c pthread_getspecific "" HAVE_PTHREAD_GETSPECIFIC)
    102       check_library_exists(c pthread_rwlock_init "" HAVE_PTHREAD_RWLOCK_INIT)
    103       check_library_exists(c pthread_mutex_lock "" HAVE_PTHREAD_MUTEX_LOCK)
    104     endif()
    105   endif()
    106   check_library_exists(dl dlopen "" HAVE_LIBDL)
    107   check_library_exists(rt clock_gettime "" HAVE_LIBRT)
    108 endif()
    109 
    110 # Don't look for these libraries on Windows. Also don't look for them if we're
    111 # using MSan, since uninstrmented third party code may call MSan interceptors
    112 # like strlen, leading to false positives.
    113 if( NOT PURE_WINDOWS AND NOT LLVM_USE_SANITIZER MATCHES "Memory.*")
    114   if (LLVM_ENABLE_ZLIB)
    115     check_library_exists(z compress2 "" HAVE_LIBZ)
    116   else()
    117     set(HAVE_LIBZ 0)
    118   endif()
    119   if (HAVE_HISTEDIT_H)
    120     check_library_exists(edit el_init "" HAVE_LIBEDIT)
    121   endif()
    122   if(LLVM_ENABLE_TERMINFO)
    123     set(HAVE_TERMINFO 0)
    124     foreach(library tinfo terminfo curses ncurses ncursesw)
    125       string(TOUPPER ${library} library_suffix)
    126       check_library_exists(${library} setupterm "" HAVE_TERMINFO_${library_suffix})
    127       if(HAVE_TERMINFO_${library_suffix})
    128         set(HAVE_TERMINFO 1)
    129         set(TERMINFO_LIBS "${library}")
    130         break()
    131       endif()
    132     endforeach()
    133   else()
    134     set(HAVE_TERMINFO 0)
    135   endif()
    136 endif()
    137 
    138 # function checks
    139 check_symbol_exists(arc4random "stdlib.h" HAVE_DECL_ARC4RANDOM)
    140 check_symbol_exists(backtrace "execinfo.h" HAVE_BACKTRACE)
    141 check_symbol_exists(getpagesize unistd.h HAVE_GETPAGESIZE)
    142 check_symbol_exists(getrusage sys/resource.h HAVE_GETRUSAGE)
    143 check_symbol_exists(setrlimit sys/resource.h HAVE_SETRLIMIT)
    144 check_symbol_exists(isatty unistd.h HAVE_ISATTY)
    145 check_symbol_exists(futimens sys/stat.h HAVE_FUTIMENS)
    146 check_symbol_exists(futimes sys/time.h HAVE_FUTIMES)
    147 if( HAVE_SETJMP_H )
    148   check_symbol_exists(longjmp setjmp.h HAVE_LONGJMP)
    149   check_symbol_exists(setjmp setjmp.h HAVE_SETJMP)
    150   check_symbol_exists(siglongjmp setjmp.h HAVE_SIGLONGJMP)
    151   check_symbol_exists(sigsetjmp setjmp.h HAVE_SIGSETJMP)
    152 endif()
    153 if( HAVE_SYS_UIO_H )
    154   check_symbol_exists(writev sys/uio.h HAVE_WRITEV)
    155 endif()
    156 check_symbol_exists(mallctl malloc_np.h HAVE_MALLCTL)
    157 check_symbol_exists(mallinfo malloc.h HAVE_MALLINFO)
    158 check_symbol_exists(malloc_zone_statistics malloc/malloc.h
    159                     HAVE_MALLOC_ZONE_STATISTICS)
    160 check_symbol_exists(mkdtemp "stdlib.h;unistd.h" HAVE_MKDTEMP)
    161 check_symbol_exists(mkstemp "stdlib.h;unistd.h" HAVE_MKSTEMP)
    162 check_symbol_exists(mktemp "stdlib.h;unistd.h" HAVE_MKTEMP)
    163 check_symbol_exists(closedir "sys/types.h;dirent.h" HAVE_CLOSEDIR)
    164 check_symbol_exists(opendir "sys/types.h;dirent.h" HAVE_OPENDIR)
    165 check_symbol_exists(readdir "sys/types.h;dirent.h" HAVE_READDIR)
    166 check_symbol_exists(getcwd unistd.h HAVE_GETCWD)
    167 check_symbol_exists(gettimeofday sys/time.h HAVE_GETTIMEOFDAY)
    168 check_symbol_exists(getrlimit "sys/types.h;sys/time.h;sys/resource.h" HAVE_GETRLIMIT)
    169 check_symbol_exists(posix_spawn spawn.h HAVE_POSIX_SPAWN)
    170 check_symbol_exists(pread unistd.h HAVE_PREAD)
    171 check_symbol_exists(realpath stdlib.h HAVE_REALPATH)
    172 check_symbol_exists(sbrk unistd.h HAVE_SBRK)
    173 check_symbol_exists(srand48 stdlib.h HAVE_RAND48_SRAND48)
    174 if( HAVE_RAND48_SRAND48 )
    175   check_symbol_exists(lrand48 stdlib.h HAVE_RAND48_LRAND48)
    176   if( HAVE_RAND48_LRAND48 )
    177     check_symbol_exists(drand48 stdlib.h HAVE_RAND48_DRAND48)
    178     if( HAVE_RAND48_DRAND48 )
    179       set(HAVE_RAND48 1 CACHE INTERNAL "are srand48/lrand48/drand48 available?")
    180     endif()
    181   endif()
    182 endif()
    183 check_symbol_exists(strtoll stdlib.h HAVE_STRTOLL)
    184 check_symbol_exists(strtoq stdlib.h HAVE_STRTOQ)
    185 check_symbol_exists(strerror string.h HAVE_STRERROR)
    186 check_symbol_exists(strerror_r string.h HAVE_STRERROR_R)
    187 check_symbol_exists(strerror_s string.h HAVE_DECL_STRERROR_S)
    188 check_symbol_exists(setenv stdlib.h HAVE_SETENV)
    189 if( PURE_WINDOWS )
    190   check_symbol_exists(_chsize_s io.h HAVE__CHSIZE_S)
    191 
    192   check_function_exists(_alloca HAVE__ALLOCA)
    193   check_function_exists(__alloca HAVE___ALLOCA)
    194   check_function_exists(__chkstk HAVE___CHKSTK)
    195   check_function_exists(__chkstk_ms HAVE___CHKSTK_MS)
    196   check_function_exists(___chkstk HAVE____CHKSTK)
    197   check_function_exists(___chkstk_ms HAVE____CHKSTK_MS)
    198 
    199   check_function_exists(__ashldi3 HAVE___ASHLDI3)
    200   check_function_exists(__ashrdi3 HAVE___ASHRDI3)
    201   check_function_exists(__divdi3 HAVE___DIVDI3)
    202   check_function_exists(__fixdfdi HAVE___FIXDFDI)
    203   check_function_exists(__fixsfdi HAVE___FIXSFDI)
    204   check_function_exists(__floatdidf HAVE___FLOATDIDF)
    205   check_function_exists(__lshrdi3 HAVE___LSHRDI3)
    206   check_function_exists(__moddi3 HAVE___MODDI3)
    207   check_function_exists(__udivdi3 HAVE___UDIVDI3)
    208   check_function_exists(__umoddi3 HAVE___UMODDI3)
    209 
    210   check_function_exists(__main HAVE___MAIN)
    211   check_function_exists(__cmpdi2 HAVE___CMPDI2)
    212 endif()
    213 if( HAVE_DLFCN_H )
    214   if( HAVE_LIBDL )
    215     list(APPEND CMAKE_REQUIRED_LIBRARIES dl)
    216   endif()
    217   check_symbol_exists(dlerror dlfcn.h HAVE_DLERROR)
    218   check_symbol_exists(dlopen dlfcn.h HAVE_DLOPEN)
    219   if( HAVE_LIBDL )
    220     list(REMOVE_ITEM CMAKE_REQUIRED_LIBRARIES dl)
    221   endif()
    222 endif()
    223 
    224 check_symbol_exists(__GLIBC__ stdio.h LLVM_USING_GLIBC)
    225 if( LLVM_USING_GLIBC )
    226   add_llvm_definitions( -D_GNU_SOURCE )
    227 endif()
    228 
    229 set(headers "sys/types.h")
    230 
    231 if (HAVE_INTTYPES_H)
    232   set(headers ${headers} "inttypes.h")
    233 endif()
    234 
    235 if (HAVE_STDINT_H)
    236   set(headers ${headers} "stdint.h")
    237 endif()
    238 
    239 check_type_exists(int64_t "${headers}" HAVE_INT64_T)
    240 check_type_exists(uint64_t "${headers}" HAVE_UINT64_T)
    241 check_type_exists(u_int64_t "${headers}" HAVE_U_INT64_T)
    242 
    243 # available programs checks
    244 function(llvm_find_program name)
    245   string(TOUPPER ${name} NAME)
    246   string(REGEX REPLACE "\\." "_" NAME ${NAME})
    247 
    248   find_program(LLVM_PATH_${NAME} NAMES ${ARGV})
    249   mark_as_advanced(LLVM_PATH_${NAME})
    250   if(LLVM_PATH_${NAME})
    251     set(HAVE_${NAME} 1 CACHE INTERNAL "Is ${name} available ?")
    252     mark_as_advanced(HAVE_${NAME})
    253   else(LLVM_PATH_${NAME})
    254     set(HAVE_${NAME} "" CACHE INTERNAL "Is ${name} available ?")
    255   endif(LLVM_PATH_${NAME})
    256 endfunction()
    257 
    258 if (LLVM_ENABLE_DOXYGEN)
    259   llvm_find_program(dot)
    260 endif ()
    261 
    262 if( LLVM_ENABLE_FFI )
    263   find_path(FFI_INCLUDE_PATH ffi.h PATHS ${FFI_INCLUDE_DIR})
    264   if( EXISTS "${FFI_INCLUDE_PATH}/ffi.h" )
    265     set(FFI_HEADER ffi.h CACHE INTERNAL "")
    266     set(HAVE_FFI_H 1 CACHE INTERNAL "")
    267   else()
    268     find_path(FFI_INCLUDE_PATH ffi/ffi.h PATHS ${FFI_INCLUDE_DIR})
    269     if( EXISTS "${FFI_INCLUDE_PATH}/ffi/ffi.h" )
    270       set(FFI_HEADER ffi/ffi.h CACHE INTERNAL "")
    271       set(HAVE_FFI_FFI_H 1 CACHE INTERNAL "")
    272     endif()
    273   endif()
    274 
    275   if( NOT FFI_HEADER )
    276     message(FATAL_ERROR "libffi includes are not found.")
    277   endif()
    278 
    279   find_library(FFI_LIBRARY_PATH ffi PATHS ${FFI_LIBRARY_DIR})
    280   if( NOT FFI_LIBRARY_PATH )
    281     message(FATAL_ERROR "libffi is not found.")
    282   endif()
    283 
    284   list(APPEND CMAKE_REQUIRED_LIBRARIES ${FFI_LIBRARY_PATH})
    285   list(APPEND CMAKE_REQUIRED_INCLUDES ${FFI_INCLUDE_PATH})
    286   check_symbol_exists(ffi_call ${FFI_HEADER} HAVE_FFI_CALL)
    287   list(REMOVE_ITEM CMAKE_REQUIRED_INCLUDES ${FFI_INCLUDE_PATH})
    288   list(REMOVE_ITEM CMAKE_REQUIRED_LIBRARIES ${FFI_LIBRARY_PATH})
    289 else()
    290   unset(HAVE_FFI_FFI_H CACHE)
    291   unset(HAVE_FFI_H CACHE)
    292   unset(HAVE_FFI_CALL CACHE)
    293 endif( LLVM_ENABLE_FFI )
    294 
    295 # Define LLVM_HAS_ATOMICS if gcc or MSVC atomic builtins are supported.
    296 include(CheckAtomic)
    297 
    298 if( LLVM_ENABLE_PIC )
    299   set(ENABLE_PIC 1)
    300 else()
    301   set(ENABLE_PIC 0)
    302   check_cxx_compiler_flag("-fno-pie" SUPPORTS_NO_PIE_FLAG)
    303   if(SUPPORTS_NO_PIE_FLAG)
    304     set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fno-pie")
    305   endif()
    306 endif()
    307 
    308 check_cxx_compiler_flag("-Wno-variadic-macros" SUPPORTS_NO_VARIADIC_MACROS_FLAG)
    309 
    310 set(USE_NO_MAYBE_UNINITIALIZED 0)
    311 set(USE_NO_UNINITIALIZED 0)
    312 
    313 # Disable gcc's potentially uninitialized use analysis as it presents lots of
    314 # false positives.
    315 if (CMAKE_COMPILER_IS_GNUCXX)
    316   check_cxx_compiler_flag("-Wmaybe-uninitialized" HAS_MAYBE_UNINITIALIZED)
    317   if (HAS_MAYBE_UNINITIALIZED)
    318     set(USE_NO_MAYBE_UNINITIALIZED 1)
    319   else()
    320     # Only recent versions of gcc make the distinction between -Wuninitialized
    321     # and -Wmaybe-uninitialized. If -Wmaybe-uninitialized isn't supported, just
    322     # turn off all uninitialized use warnings.
    323     check_cxx_compiler_flag("-Wuninitialized" HAS_UNINITIALIZED)
    324     set(USE_NO_UNINITIALIZED ${HAS_UNINITIALIZED})
    325   endif()
    326 endif()
    327 
    328 # By default, we target the host, but this can be overridden at CMake
    329 # invocation time.
    330 include(GetHostTriple)
    331 get_host_triple(LLVM_INFERRED_HOST_TRIPLE)
    332 
    333 set(LLVM_HOST_TRIPLE "${LLVM_INFERRED_HOST_TRIPLE}" CACHE STRING
    334     "Host on which LLVM binaries will run")
    335 
    336 # Determine the native architecture.
    337 string(TOLOWER "${LLVM_TARGET_ARCH}" LLVM_NATIVE_ARCH)
    338 if( LLVM_NATIVE_ARCH STREQUAL "host" )
    339   string(REGEX MATCH "^[^-]*" LLVM_NATIVE_ARCH ${LLVM_HOST_TRIPLE})
    340 endif ()
    341 
    342 if (LLVM_NATIVE_ARCH MATCHES "i[2-6]86")
    343   set(LLVM_NATIVE_ARCH X86)
    344 elseif (LLVM_NATIVE_ARCH STREQUAL "x86")
    345   set(LLVM_NATIVE_ARCH X86)
    346 elseif (LLVM_NATIVE_ARCH STREQUAL "amd64")
    347   set(LLVM_NATIVE_ARCH X86)
    348 elseif (LLVM_NATIVE_ARCH STREQUAL "x86_64")
    349   set(LLVM_NATIVE_ARCH X86)
    350 elseif (LLVM_NATIVE_ARCH MATCHES "sparc")
    351   set(LLVM_NATIVE_ARCH Sparc)
    352 elseif (LLVM_NATIVE_ARCH MATCHES "powerpc")
    353   set(LLVM_NATIVE_ARCH PowerPC)
    354 elseif (LLVM_NATIVE_ARCH MATCHES "aarch64")
    355   set(LLVM_NATIVE_ARCH AArch64)
    356 elseif (LLVM_NATIVE_ARCH MATCHES "arm64")
    357   set(LLVM_NATIVE_ARCH AArch64)
    358 elseif (LLVM_NATIVE_ARCH MATCHES "arm")
    359   set(LLVM_NATIVE_ARCH ARM)
    360 elseif (LLVM_NATIVE_ARCH MATCHES "mips")
    361   set(LLVM_NATIVE_ARCH Mips)
    362 elseif (LLVM_NATIVE_ARCH MATCHES "xcore")
    363   set(LLVM_NATIVE_ARCH XCore)
    364 elseif (LLVM_NATIVE_ARCH MATCHES "msp430")
    365   set(LLVM_NATIVE_ARCH MSP430)
    366 elseif (LLVM_NATIVE_ARCH MATCHES "hexagon")
    367   set(LLVM_NATIVE_ARCH Hexagon)
    368 elseif (LLVM_NATIVE_ARCH MATCHES "s390x")
    369   set(LLVM_NATIVE_ARCH SystemZ)
    370 elseif (LLVM_NATIVE_ARCH MATCHES "wasm32")
    371   set(LLVM_NATIVE_ARCH WebAssembly)
    372 elseif (LLVM_NATIVE_ARCH MATCHES "wasm64")
    373   set(LLVM_NATIVE_ARCH WebAssembly)
    374 else ()
    375   message(FATAL_ERROR "Unknown architecture ${LLVM_NATIVE_ARCH}")
    376 endif ()
    377 
    378 # If build targets includes "host", then replace with native architecture.
    379 list(FIND LLVM_TARGETS_TO_BUILD "host" idx)
    380 if( NOT idx LESS 0 )
    381   list(REMOVE_AT LLVM_TARGETS_TO_BUILD ${idx})
    382   list(APPEND LLVM_TARGETS_TO_BUILD ${LLVM_NATIVE_ARCH})
    383   list(REMOVE_DUPLICATES LLVM_TARGETS_TO_BUILD)
    384 endif()
    385 
    386 list(FIND LLVM_TARGETS_TO_BUILD ${LLVM_NATIVE_ARCH} NATIVE_ARCH_IDX)
    387 if (NATIVE_ARCH_IDX EQUAL -1)
    388   message(STATUS
    389     "Native target ${LLVM_NATIVE_ARCH} is not selected; lli will not JIT code")
    390 else ()
    391   message(STATUS "Native target architecture is ${LLVM_NATIVE_ARCH}")
    392   set(LLVM_NATIVE_TARGET LLVMInitialize${LLVM_NATIVE_ARCH}Target)
    393   set(LLVM_NATIVE_TARGETINFO LLVMInitialize${LLVM_NATIVE_ARCH}TargetInfo)
    394   set(LLVM_NATIVE_TARGETMC LLVMInitialize${LLVM_NATIVE_ARCH}TargetMC)
    395   set(LLVM_NATIVE_ASMPRINTER LLVMInitialize${LLVM_NATIVE_ARCH}AsmPrinter)
    396 
    397   # We don't have an ASM parser for all architectures yet.
    398   if (EXISTS ${CMAKE_SOURCE_DIR}/lib/Target/${LLVM_NATIVE_ARCH}/AsmParser/CMakeLists.txt)
    399     set(LLVM_NATIVE_ASMPARSER LLVMInitialize${LLVM_NATIVE_ARCH}AsmParser)
    400   endif ()
    401 
    402   # We don't have an disassembler for all architectures yet.
    403   if (EXISTS ${CMAKE_SOURCE_DIR}/lib/Target/${LLVM_NATIVE_ARCH}/Disassembler/CMakeLists.txt)
    404     set(LLVM_NATIVE_DISASSEMBLER LLVMInitialize${LLVM_NATIVE_ARCH}Disassembler)
    405   endif ()
    406 endif ()
    407 
    408 if( MINGW )
    409   set(HAVE_LIBPSAPI 1)
    410   set(HAVE_LIBSHELL32 1)
    411   # TODO: Check existence of libraries.
    412   #   include(CheckLibraryExists)
    413 endif( MINGW )
    414 
    415 if (NOT HAVE_STRTOLL)
    416   # Use _strtoi64 if strtoll is not available.
    417   check_symbol_exists(_strtoi64 stdlib.h have_strtoi64)
    418   if (have_strtoi64)
    419     set(HAVE_STRTOLL 1)
    420     set(strtoll "_strtoi64")
    421     set(strtoull "_strtoui64")
    422   endif ()
    423 endif ()
    424 
    425 if( MSVC )
    426   set(SHLIBEXT ".lib")
    427   set(stricmp "_stricmp")
    428   set(strdup "_strdup")
    429 
    430   # See if the DIA SDK is available and usable.
    431   set(MSVC_DIA_SDK_DIR "$ENV{VSINSTALLDIR}DIA SDK")
    432 
    433   # Due to a bug in MSVC 2013's installation software, it is possible
    434   # for MSVC 2013 to write the DIA SDK into the Visual Studio 2012
    435   # install directory.  If this happens, the installation is corrupt
    436   # and there's nothing we can do.  It happens with enough frequency
    437   # though that we should handle it.  We do so by simply checking that
    438   # the DIA SDK folder exists.  Should this happen you will need to
    439   # uninstall VS 2012 and then re-install VS 2013.
    440   if (IS_DIRECTORY ${MSVC_DIA_SDK_DIR})
    441     set(HAVE_DIA_SDK 1)
    442   else()
    443     set(HAVE_DIA_SDK 0)
    444   endif()
    445 else()
    446   set(HAVE_DIA_SDK 0)
    447 endif( MSVC )
    448 
    449 if( PURE_WINDOWS )
    450   CHECK_CXX_SOURCE_COMPILES("
    451     #include <windows.h>
    452     #include <imagehlp.h>
    453     extern \"C\" void foo(PENUMLOADED_MODULES_CALLBACK);
    454     extern \"C\" void foo(BOOL(CALLBACK*)(PCSTR,ULONG_PTR,ULONG,PVOID));
    455     int main(){return 0;}"
    456     HAVE_ELMCB_PCSTR)
    457   if( HAVE_ELMCB_PCSTR )
    458     set(WIN32_ELMCB_PCSTR "PCSTR")
    459   else()
    460     set(WIN32_ELMCB_PCSTR "PSTR")
    461   endif()
    462 endif( PURE_WINDOWS )
    463 
    464 # FIXME: Signal handler return type, currently hardcoded to 'void'
    465 set(RETSIGTYPE void)
    466 
    467 if( LLVM_ENABLE_THREADS )
    468   # Check if threading primitives aren't supported on this platform
    469   if( NOT HAVE_PTHREAD_H AND NOT WIN32 )
    470     set(LLVM_ENABLE_THREADS 0)
    471   endif()
    472 endif()
    473 
    474 if( LLVM_ENABLE_THREADS )
    475   message(STATUS "Threads enabled.")
    476 else( LLVM_ENABLE_THREADS )
    477   message(STATUS "Threads disabled.")
    478 endif()
    479 
    480 if (LLVM_ENABLE_ZLIB )
    481   # Check if zlib is available in the system.
    482   if ( NOT HAVE_ZLIB_H OR NOT HAVE_LIBZ )
    483     set(LLVM_ENABLE_ZLIB 0)
    484   endif()
    485 endif()
    486 
    487 set(LLVM_PREFIX ${CMAKE_INSTALL_PREFIX})
    488 
    489 if (LLVM_ENABLE_DOXYGEN)
    490   message(STATUS "Doxygen enabled.")
    491   find_package(Doxygen REQUIRED)
    492 
    493   if (DOXYGEN_FOUND)
    494     # If we find doxygen and we want to enable doxygen by default create a
    495     # global aggregate doxygen target for generating llvm and any/all
    496     # subprojects doxygen documentation.
    497     if (LLVM_BUILD_DOCS)
    498       add_custom_target(doxygen ALL)
    499     endif()
    500 
    501     option(LLVM_DOXYGEN_EXTERNAL_SEARCH "Enable doxygen external search." OFF)
    502     if (LLVM_DOXYGEN_EXTERNAL_SEARCH)
    503       set(LLVM_DOXYGEN_SEARCHENGINE_URL "" CACHE STRING "URL to use for external search.")
    504       set(LLVM_DOXYGEN_SEARCH_MAPPINGS "" CACHE STRING "Doxygen Search Mappings")
    505     endif()
    506   endif()
    507 else()
    508   message(STATUS "Doxygen disabled.")
    509 endif()
    510 
    511 if (LLVM_ENABLE_SPHINX)
    512   message(STATUS "Sphinx enabled.")
    513   find_package(Sphinx REQUIRED)
    514   if (LLVM_BUILD_DOCS)
    515     add_custom_target(sphinx ALL)
    516   endif()
    517 else()
    518   message(STATUS "Sphinx disabled.")
    519 endif()
    520 
    521 set(LLVM_BINDINGS "")
    522 if(WIN32)
    523   message(STATUS "Go bindings disabled.")
    524 else()
    525   find_program(GO_EXECUTABLE NAMES go DOC "go executable")
    526   if(GO_EXECUTABLE STREQUAL "GO_EXECUTABLE-NOTFOUND")
    527     message(STATUS "Go bindings disabled.")
    528   else()
    529     execute_process(COMMAND ${GO_EXECUTABLE} run ${CMAKE_SOURCE_DIR}/bindings/go/conftest.go
    530                     RESULT_VARIABLE GO_CONFTEST)
    531     if(GO_CONFTEST STREQUAL "0")
    532       set(LLVM_BINDINGS "${LLVM_BINDINGS} go")
    533       message(STATUS "Go bindings enabled.")
    534     else()
    535       message(STATUS "Go bindings disabled, need at least Go 1.2.")
    536     endif()
    537   endif()
    538 endif()
    539 
    540 find_program(GOLD_EXECUTABLE NAMES ${LLVM_DEFAULT_TARGET_TRIPLE}-ld.gold ld.gold ${LLVM_DEFAULT_TARGET_TRIPLE}-ld ld DOC "The gold linker")
    541 set(LLVM_BINUTILS_INCDIR "" CACHE PATH
    542 	"PATH to binutils/include containing plugin-api.h for gold plugin.")
    543 
    544 if(APPLE)
    545   find_program(LD64_EXECUTABLE NAMES ld DOC "The ld64 linker")
    546 endif()
    547 
    548 include(FindOCaml)
    549 include(AddOCaml)
    550 if(WIN32)
    551   message(STATUS "OCaml bindings disabled.")
    552 else()
    553   find_package(OCaml)
    554   if( NOT OCAML_FOUND )
    555     message(STATUS "OCaml bindings disabled.")
    556   else()
    557     if( OCAML_VERSION VERSION_LESS "4.00.0" )
    558       message(STATUS "OCaml bindings disabled, need OCaml >=4.00.0.")
    559     else()
    560       find_ocamlfind_package(ctypes VERSION 0.4 OPTIONAL)
    561       if( HAVE_OCAML_CTYPES )
    562         message(STATUS "OCaml bindings enabled.")
    563         find_ocamlfind_package(oUnit VERSION 2 OPTIONAL)
    564         set(LLVM_BINDINGS "${LLVM_BINDINGS} ocaml")
    565       else()
    566         message(STATUS "OCaml bindings disabled, need ctypes >=0.4.")
    567       endif()
    568     endif()
    569   endif()
    570 endif()
    571 
    572 string(REPLACE " " ";" LLVM_BINDINGS_LIST "${LLVM_BINDINGS}")
    573