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      1 ## Process this file with autoconf to produce configure.
      2 ## In general, the safest way to proceed is to run ./autogen.sh
      3 
      4 AC_PREREQ(2.59)
      5 
      6 # Note:  If you change the version, you must also update it in:
      7 # * Protobuf.podspec
      8 # * csharp/Google.Protobuf.Tools.nuspec
      9 # * csharp/src/*/AssemblyInfo.cs
     10 # * csharp/src/Google.Protobuf/Google.Protobuf.nuspec
     11 # * java/*/pom.xml
     12 # * python/google/protobuf/__init__.py
     13 # * protoc-artifacts/pom.xml
     14 # * src/google/protobuf/stubs/common.h
     15 # * src/Makefile.am (Update -version-info for LDFLAGS if needed)
     16 #
     17 # In the SVN trunk, the version should always be the next anticipated release
     18 # version with the "-pre" suffix.  (We used to use "-SNAPSHOT" but this pushed
     19 # the size of one file name in the dist tarfile over the 99-char limit.)
     20 AC_INIT([Protocol Buffers],[3.0.0],[protobuf@googlegroups.com],[protobuf])
     21 
     22 AM_MAINTAINER_MODE([enable])
     23 
     24 AC_CONFIG_SRCDIR(src/google/protobuf/message.cc)
     25 # The config file is generated but not used by the source code, since we only
     26 # need very few of them, e.g. HAVE_PTHREAD and HAVE_ZLIB. Those macros are
     27 # passed down in CXXFLAGS manually in src/Makefile.am
     28 AC_CONFIG_HEADERS([config.h])
     29 AC_CONFIG_MACRO_DIR([m4])
     30 
     31 AC_ARG_VAR(DIST_LANG, [language to include in the distribution package (i.e., make dist)])
     32 case "$DIST_LANG" in
     33   "") DIST_LANG=all ;;
     34   all | cpp | csharp | java | python | javanano | objectivec | ruby | js) ;;
     35   *) AC_MSG_FAILURE([unknown language: $DIST_LANG]) ;;
     36 esac
     37 AC_SUBST(DIST_LANG)
     38 
     39 # autoconf's default CXXFLAGS are usually "-g -O2".  These aren't necessarily
     40 # the best choice for libprotobuf.
     41 AS_IF([test "x${ac_cv_env_CFLAGS_set}" = "x"],
     42       [CFLAGS=""])
     43 AS_IF([test "x${ac_cv_env_CXXFLAGS_set}" = "x"],
     44       [CXXFLAGS=""])
     45 
     46 AC_CANONICAL_TARGET
     47 
     48 AM_INIT_AUTOMAKE([1.9 tar-ustar subdir-objects])
     49 
     50 AC_ARG_WITH([zlib],
     51   [AS_HELP_STRING([--with-zlib],
     52     [include classes for streaming compressed data in and out @<:@default=check@:>@])],
     53   [],[with_zlib=check])
     54 
     55 AC_ARG_WITH([protoc],
     56   [AS_HELP_STRING([--with-protoc=COMMAND],
     57     [use the given protoc command instead of building a new one when building tests (useful for cross-compiling)])],
     58   [],[with_protoc=no])
     59 
     60 # Checks for programs.
     61 AC_PROG_CC
     62 AC_PROG_CXX
     63 AC_LANG([C++])
     64 ACX_USE_SYSTEM_EXTENSIONS
     65 m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
     66 AM_CONDITIONAL(GCC, test "$GCC" = yes)   # let the Makefile know if we're gcc
     67 AC_PROG_OBJC
     68 
     69 # test_util.cc takes forever to compile with GCC and optimization turned on.
     70 AC_MSG_CHECKING([C++ compiler flags...])
     71 AS_IF([test "x${ac_cv_env_CXXFLAGS_set}" = "x"],[
     72   AS_IF([test "$GCC" = "yes"],[
     73     PROTOBUF_OPT_FLAG="-O2"
     74     CXXFLAGS="${CXXFLAGS} -g"
     75   ])
     76 
     77   # Protocol Buffers contains several checks that are intended to be used only
     78   # for debugging and which might hurt performance.  Most users are probably
     79   # end users who don't want these checks, so add -DNDEBUG by default.
     80   CXXFLAGS="$CXXFLAGS -DNDEBUG"
     81 
     82   AC_MSG_RESULT([use default: $PROTOBUF_OPT_FLAG $CXXFLAGS])
     83 ],[
     84   AC_MSG_RESULT([use user-supplied: $CXXFLAGS])
     85 ])
     86 
     87 AC_SUBST(PROTOBUF_OPT_FLAG)
     88 
     89 ACX_CHECK_SUNCC
     90 
     91 # Have to do libtool after SUNCC, other wise it "helpfully" adds Crun Cstd
     92 # to the link
     93 AC_PROG_LIBTOOL
     94 
     95 # Checks for header files.
     96 AC_HEADER_STDC
     97 AC_CHECK_HEADERS([fcntl.h inttypes.h limits.h stdlib.h unistd.h])
     98 
     99 # Checks for library functions.
    100 AC_FUNC_MEMCMP
    101 AC_FUNC_STRTOD
    102 AC_CHECK_FUNCS([ftruncate memset mkdir strchr strerror strtol])
    103 
    104 # Check for zlib.
    105 HAVE_ZLIB=0
    106 AS_IF([test "$with_zlib" != no], [
    107   AC_MSG_CHECKING([zlib version])
    108 
    109   # First check the zlib header version.
    110   AC_COMPILE_IFELSE(
    111     [AC_LANG_PROGRAM([[
    112         #include <zlib.h>
    113         #if !defined(ZLIB_VERNUM) || (ZLIB_VERNUM < 0x1204)
    114         # error zlib version too old
    115         #endif
    116         ]], [])], [
    117     AC_MSG_RESULT([ok (1.2.0.4 or later)])
    118 
    119     # Also need to add -lz to the linker flags and make sure this succeeds.
    120     AC_SEARCH_LIBS([zlibVersion], [z], [
    121       AC_DEFINE([HAVE_ZLIB], [1], [Enable classes using zlib compression.])
    122       HAVE_ZLIB=1
    123     ], [
    124       AS_IF([test "$with_zlib" != check], [
    125         AC_MSG_FAILURE([--with-zlib was given, but no working zlib library was found])
    126       ])
    127     ])
    128   ], [
    129     AS_IF([test "$with_zlib" = check], [
    130       AC_MSG_RESULT([headers missing or too old (requires 1.2.0.4)])
    131     ], [
    132       AC_MSG_FAILURE([--with-zlib was given, but zlib headers were not present or were too old (requires 1.2.0.4)])
    133     ])
    134   ])
    135 ])
    136 AM_CONDITIONAL([HAVE_ZLIB], [test $HAVE_ZLIB = 1])
    137 
    138 AS_IF([test "$with_protoc" != "no"], [
    139   PROTOC=$with_protoc
    140   AS_IF([test "$with_protoc" = "yes"], [
    141     # No argument given.  Use system protoc.
    142     PROTOC=protoc
    143   ])
    144   AS_IF([echo "$PROTOC" | grep -q '^@<:@^/@:>@.*/'], [
    145     # Does not start with a slash, but contains a slash.  So, it's a relative
    146     # path (as opposed to an absolute path or an executable in $PATH).
    147     # Since it will actually be executed from the src directory, prefix with
    148     # the current directory.  We also insert $ac_top_build_prefix in case this
    149     # is a nested package and --with-protoc was actually given on the outer
    150     # package's configure script.
    151     PROTOC=`pwd`/${ac_top_build_prefix}$PROTOC
    152   ])
    153   AC_SUBST([PROTOC])
    154 ])
    155 AM_CONDITIONAL([USE_EXTERNAL_PROTOC], [test "$with_protoc" != "no"])
    156 
    157 ACX_PTHREAD
    158 AM_CONDITIONAL([HAVE_PTHREAD], [test "x$acx_pthread_ok" = "xyes"])
    159 
    160 # We still keep this for improving pbconfig.h for unsupported platforms.
    161 AC_CXX_STL_HASH
    162 
    163 case "$target_os" in
    164   mingw* | cygwin* | win*)
    165     ;;
    166   *)
    167     # Need to link against rt on Solaris
    168     AC_SEARCH_LIBS([sched_yield], [rt], [], [AC_MSG_FAILURE([sched_yield was not found on your system])])
    169     ;;
    170 esac
    171 
    172 # Enable ObjC support for conformance directory on OS X.
    173 OBJC_CONFORMANCE_TEST=0
    174 case "$target_os" in
    175   darwin*)
    176     OBJC_CONFORMANCE_TEST=1
    177     ;;
    178 esac
    179 AM_CONDITIONAL([OBJC_CONFORMANCE_TEST], [test $OBJC_CONFORMANCE_TEST = 1])
    180 
    181 # HACK:  Make gmock's configure script pick up our copy of CFLAGS and CXXFLAGS,
    182 #   since the flags added by ACX_CHECK_SUNCC must be used when compiling gmock
    183 #   too.
    184 export CFLAGS
    185 export CXXFLAGS
    186 AC_CONFIG_SUBDIRS([gmock])
    187 
    188 AC_CONFIG_FILES([Makefile src/Makefile benchmarks/Makefile conformance/Makefile protobuf.pc protobuf-lite.pc])
    189 AC_OUTPUT
    190