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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 # * java/pom.xml
      8 # * python/setup.py
      9 # * src/google/protobuf/stubs/common.h
     10 # * src/Makefile.am (Update -version-info for LDFLAGS if needed)
     11 #
     12 # In the SVN trunk, the version should always be the next anticipated release
     13 # version with the "-pre" suffix.  (We used to use "-SNAPSHOT" but this pushed
     14 # the size of one file name in the dist tarfile over the 99-char limit.)
     15 AC_INIT([Protocol Buffers],[2.3.0],[protobuf@googlegroups.com],[protobuf])
     16 
     17 
     18 AC_CONFIG_SRCDIR(src/google/protobuf/message.cc)
     19 AC_CONFIG_HEADERS([config.h])
     20 AC_CONFIG_MACRO_DIR([m4])
     21 
     22 # autoconf's default CXXFLAGS are usually "-g -O2".  These aren't necessarily
     23 # the best choice for libprotobuf.
     24 AS_IF([test "x${ac_cv_env_CFLAGS_set}" = "x"],
     25       [CFLAGS=""])
     26 AS_IF([test "x${ac_cv_env_CXXFLAGS_set}" = "x"],
     27       [CXXFLAGS=""])
     28 
     29 AC_CANONICAL_TARGET
     30 
     31 AM_INIT_AUTOMAKE
     32 
     33 AC_ARG_WITH([zlib],
     34   [AS_HELP_STRING([--with-zlib],
     35     [include classes for streaming compressed data in and out @<:@default=check@:>@])],
     36   [],[with_zlib=check])
     37 
     38 AC_ARG_WITH([protoc],
     39   [AS_HELP_STRING([--with-protoc=COMMAND],
     40     [use the given protoc command instead of building a new one when building tests (useful for cross-compiling)])],
     41   [],[with_protoc=no])
     42 
     43 # Checks for programs.
     44 AC_PROG_CC
     45 AC_PROG_CXX
     46 AC_LANG([C++])
     47 ACX_USE_SYSTEM_EXTENSIONS
     48 AM_CONDITIONAL(GCC, test "$GCC" = yes)   # let the Makefile know if we're gcc
     49 
     50 # test_util.cc takes forever to compile with GCC and optimization turned on.
     51 AC_MSG_CHECKING([C++ compiler flags...])
     52 AS_IF([test "x${ac_cv_env_CXXFLAGS_set}" = "x"],[
     53   AS_IF([test "$GCC" = "yes"],[
     54     PROTOBUF_OPT_FLAG="-O2"
     55     CXXFLAGS="${CXXFLAGS} -g"
     56   ])
     57 
     58   # Protocol Buffers contains several checks that are intended to be used only
     59   # for debugging and which might hurt performance.  Most users are probably
     60   # end users who don't want these checks, so add -DNDEBUG by default.
     61   CXXFLAGS="$CXXFLAGS -DNDEBUG"
     62 
     63   AC_MSG_RESULT([use default: $PROTOBUF_OPT_FLAG $CXXFLAGS])
     64 ],[
     65   AC_MSG_RESULT([use user-supplied: $CXXFLAGS])
     66 ])
     67 
     68 AC_SUBST(PROTOBUF_OPT_FLAG)
     69 
     70 ACX_CHECK_SUNCC
     71 
     72 # Have to do libtool after SUNCC, other wise it "helpfully" adds Crun Cstd
     73 # to the link
     74 AC_PROG_LIBTOOL
     75 
     76 # Checks for header files.
     77 AC_HEADER_STDC
     78 AC_CHECK_HEADERS([fcntl.h inttypes.h limits.h stdlib.h unistd.h])
     79 
     80 # Checks for library functions.
     81 AC_FUNC_MEMCMP
     82 AC_FUNC_STRTOD
     83 AC_CHECK_FUNCS([ftruncate memset mkdir strchr strerror strtol])
     84 
     85 # Check for zlib.
     86 HAVE_ZLIB=0
     87 AS_IF([test "$with_zlib" != no], [
     88   AC_MSG_CHECKING([zlib version])
     89 
     90   # First check the zlib header version.
     91   AC_COMPILE_IFELSE(
     92     AC_LANG_PROGRAM([[
     93         #include <zlib.h>
     94         #if !defined(ZLIB_VERNUM) || (ZLIB_VERNUM < 0x1204)
     95         # error zlib version too old
     96         #endif
     97         ]], []), [
     98     AC_MSG_RESULT([ok (1.2.0.4 or later)])
     99 
    100     # Also need to add -lz to the linker flags and make sure this succeeds.
    101     AC_SEARCH_LIBS([zlibVersion], [z], [
    102       AC_DEFINE([HAVE_ZLIB], [1], [Enable classes using zlib compression.])
    103       HAVE_ZLIB=1
    104     ], [
    105       AS_IF([test "$with_zlib" != check], [
    106         AC_MSG_FAILURE([--with-zlib was given, but no working zlib library was found])
    107       ])
    108     ])
    109   ], [
    110     AS_IF([test "$with_zlib" = check], [
    111       AC_MSG_RESULT([headers missing or too old (requires 1.2.0.4)])
    112     ], [
    113       AC_MSG_FAILURE([--with-zlib was given, but zlib headers were not present or were too old (requires 1.2.0.4)])
    114     ])
    115   ])
    116 ])
    117 AM_CONDITIONAL([HAVE_ZLIB], [test $HAVE_ZLIB = 1])
    118 
    119 AS_IF([test "$with_protoc" != "no"], [
    120   PROTOC=$with_protoc
    121   AS_IF([test "$with_protoc" == "yes"], [
    122     # No argument given.  Use system protoc.
    123     PROTOC=protoc
    124   ])
    125   AS_IF([echo "$PROTOC" | grep -q '^@<:@^/@:>@.*/'], [
    126     # Does not start with a slash, but contains a slash.  So, it's a relative
    127     # path (as opposed to an absolute path or an executable in $PATH).
    128     # Since it will actually be executed from the src directory, prefix with
    129     # the current directory.  We also insert $ac_top_build_prefix in case this
    130     # is a nested package and --with-protoc was actually given on the outer
    131     # package's configure script.
    132     PROTOC=`pwd`/${ac_top_build_prefix}$PROTOC
    133   ])
    134   AC_SUBST([PROTOC])
    135 ])
    136 AM_CONDITIONAL([USE_EXTERNAL_PROTOC], [test "$with_protoc" != "no"])
    137 
    138 ACX_PTHREAD
    139 AC_CXX_STL_HASH
    140 
    141 # HACK:  Make gtest's configure script pick up our copy of CFLAGS and CXXFLAGS,
    142 #   since the flags added by ACX_CHECK_SUNCC must be used when compiling gtest
    143 #   too.
    144 export CFLAGS
    145 export CXXFLAGS
    146 AC_CONFIG_SUBDIRS([gtest])
    147 
    148 AC_CONFIG_FILES([Makefile src/Makefile protobuf.pc protobuf-lite.pc])
    149 AC_OUTPUT
    150