1## Process this file with autoconf to produce configure. 2## In general, the safest way to proceed is to run ./autogen.sh 3 4AC_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.) 15AC_INIT([Protocol Buffers],[2.6.1],[protobuf@googlegroups.com],[protobuf]) 16 17AM_MAINTAINER_MODE([enable]) 18 19AC_CONFIG_SRCDIR(src/google/protobuf/message.cc) 20AC_CONFIG_HEADERS([config.h]) 21AC_CONFIG_MACRO_DIR([m4]) 22 23# autoconf's default CXXFLAGS are usually "-g -O2". These aren't necessarily 24# the best choice for libprotobuf. 25AS_IF([test "x${ac_cv_env_CFLAGS_set}" = "x"], 26 [CFLAGS=""]) 27AS_IF([test "x${ac_cv_env_CXXFLAGS_set}" = "x"], 28 [CXXFLAGS=""]) 29 30AC_CANONICAL_TARGET 31 32AM_INIT_AUTOMAKE([subdir-objects]) 33 34AC_ARG_WITH([zlib], 35 [AS_HELP_STRING([--with-zlib], 36 [include classes for streaming compressed data in and out @<:@default=check@:>@])], 37 [],[with_zlib=check]) 38 39AC_ARG_WITH([protoc], 40 [AS_HELP_STRING([--with-protoc=COMMAND], 41 [use the given protoc command instead of building a new one when building tests (useful for cross-compiling)])], 42 [],[with_protoc=no]) 43 44# Checks for programs. 45AC_PROG_CC 46AC_PROG_CXX 47AC_LANG([C++]) 48ACX_USE_SYSTEM_EXTENSIONS 49AM_CONDITIONAL(GCC, test "$GCC" = yes) # let the Makefile know if we're gcc 50 51# test_util.cc takes forever to compile with GCC and optimization turned on. 52AC_MSG_CHECKING([C++ compiler flags...]) 53AS_IF([test "x${ac_cv_env_CXXFLAGS_set}" = "x"],[ 54 AS_IF([test "$GCC" = "yes"],[ 55 PROTOBUF_OPT_FLAG="-O2" 56 CXXFLAGS="${CXXFLAGS} -g" 57 ]) 58 59 # Protocol Buffers contains several checks that are intended to be used only 60 # for debugging and which might hurt performance. Most users are probably 61 # end users who don't want these checks, so add -DNDEBUG by default. 62 CXXFLAGS="$CXXFLAGS -DNDEBUG" 63 64 AC_MSG_RESULT([use default: $PROTOBUF_OPT_FLAG $CXXFLAGS]) 65],[ 66 AC_MSG_RESULT([use user-supplied: $CXXFLAGS]) 67]) 68 69AC_SUBST(PROTOBUF_OPT_FLAG) 70 71ACX_CHECK_SUNCC 72 73# Have to do libtool after SUNCC, other wise it "helpfully" adds Crun Cstd 74# to the link 75AC_PROG_LIBTOOL 76 77# Checks for header files. 78AC_HEADER_STDC 79AC_CHECK_HEADERS([fcntl.h inttypes.h limits.h stdlib.h unistd.h]) 80 81# Checks for library functions. 82AC_FUNC_MEMCMP 83AC_FUNC_STRTOD 84AC_CHECK_FUNCS([ftruncate memset mkdir strchr strerror strtol]) 85 86# Check for zlib. 87HAVE_ZLIB=0 88AS_IF([test "$with_zlib" != no], [ 89 AC_MSG_CHECKING([zlib version]) 90 91 # First check the zlib header version. 92 AC_COMPILE_IFELSE( 93 [AC_LANG_PROGRAM([[ 94 #include <zlib.h> 95 #if !defined(ZLIB_VERNUM) || (ZLIB_VERNUM < 0x1204) 96 # error zlib version too old 97 #endif 98 ]], [])], [ 99 AC_MSG_RESULT([ok (1.2.0.4 or later)]) 100 101 # Also need to add -lz to the linker flags and make sure this succeeds. 102 AC_SEARCH_LIBS([zlibVersion], [z], [ 103 AC_DEFINE([HAVE_ZLIB], [1], [Enable classes using zlib compression.]) 104 HAVE_ZLIB=1 105 ], [ 106 AS_IF([test "$with_zlib" != check], [ 107 AC_MSG_FAILURE([--with-zlib was given, but no working zlib library was found]) 108 ]) 109 ]) 110 ], [ 111 AS_IF([test "$with_zlib" = check], [ 112 AC_MSG_RESULT([headers missing or too old (requires 1.2.0.4)]) 113 ], [ 114 AC_MSG_FAILURE([--with-zlib was given, but zlib headers were not present or were too old (requires 1.2.0.4)]) 115 ]) 116 ]) 117]) 118AM_CONDITIONAL([HAVE_ZLIB], [test $HAVE_ZLIB = 1]) 119 120AS_IF([test "$with_protoc" != "no"], [ 121 PROTOC=$with_protoc 122 AS_IF([test "$with_protoc" = "yes"], [ 123 # No argument given. Use system protoc. 124 PROTOC=protoc 125 ]) 126 AS_IF([echo "$PROTOC" | grep -q '^@<:@^/@:>@.*/'], [ 127 # Does not start with a slash, but contains a slash. So, it's a relative 128 # path (as opposed to an absolute path or an executable in $PATH). 129 # Since it will actually be executed from the src directory, prefix with 130 # the current directory. We also insert $ac_top_build_prefix in case this 131 # is a nested package and --with-protoc was actually given on the outer 132 # package's configure script. 133 PROTOC=`pwd`/${ac_top_build_prefix}$PROTOC 134 ]) 135 AC_SUBST([PROTOC]) 136]) 137AM_CONDITIONAL([USE_EXTERNAL_PROTOC], [test "$with_protoc" != "no"]) 138 139ACX_PTHREAD 140AC_CXX_STL_HASH 141 142case "$target_os" in 143 mingw* | cygwin* | win*) 144 ;; 145 *) 146 # Need to link against rt on Solaris 147 AC_SEARCH_LIBS([sched_yield], [rt], [], [AC_MSG_FAILURE([sched_yield was not found on your system])]) 148 ;; 149esac 150 151# HACK: Make gtest's configure script pick up our copy of CFLAGS and CXXFLAGS, 152# since the flags added by ACX_CHECK_SUNCC must be used when compiling gtest 153# too. 154export CFLAGS 155export CXXFLAGS 156AC_CONFIG_SUBDIRS([gtest]) 157 158AC_CONFIG_FILES([Makefile src/Makefile protobuf.pc protobuf-lite.pc]) 159AC_OUTPUT 160