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# * 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.) 20AC_INIT([Protocol Buffers],[3.13.0],[protobuf@googlegroups.com],[protobuf]) 21 22AM_MAINTAINER_MODE([enable]) 23 24AC_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 28AC_CONFIG_HEADERS([config.h]) 29AC_CONFIG_MACRO_DIR([m4]) 30 31AC_ARG_VAR(DIST_LANG, [language to include in the distribution package (i.e., make dist)]) 32case "$DIST_LANG" in 33 "") DIST_LANG=all ;; 34 all | cpp | csharp | java | python | javanano | objectivec | ruby | js | php) ;; 35 *) AC_MSG_FAILURE([unknown language: $DIST_LANG]) ;; 36esac 37AC_SUBST(DIST_LANG) 38 39# autoconf's default CXXFLAGS are usually "-g -O2". These aren't necessarily 40# the best choice for libprotobuf. 41AS_IF([test "x${ac_cv_env_CFLAGS_set}" = "x"], 42 [CFLAGS=""]) 43AS_IF([test "x${ac_cv_env_CXXFLAGS_set}" = "x"], 44 [CXXFLAGS=""]) 45 46AC_CANONICAL_TARGET 47 48AM_INIT_AUTOMAKE([1.9 tar-ustar subdir-objects]) 49 50# Silent rules enabled: the output is minimal but informative. 51# In particular, the warnings from the compiler stick out very clearly. 52# To see all logs, use the --disable-silent-rules on configure or via make V=1 53AM_SILENT_RULES([yes]) 54 55AC_ARG_WITH([zlib], 56 [AS_HELP_STRING([--with-zlib], 57 [include classes for streaming compressed data in and out @<:@default=check@:>@])], 58 [],[with_zlib=check]) 59 60AC_ARG_WITH([zlib-include], 61 [AS_HELP_STRING([--with-zlib-include=PATH], 62 [zlib include directory])], 63 [CPPFLAGS="-I$withval $CPPFLAGS"]) 64 65AC_ARG_WITH([zlib-lib], 66 [AS_HELP_STRING([--with-zlib-lib=PATH], 67 [zlib lib directory])], 68 [LDFLAGS="-L$withval $LDFLAGS"]) 69 70AC_ARG_WITH([protoc], 71 [AS_HELP_STRING([--with-protoc=COMMAND], 72 [use the given protoc command instead of building a new one when building tests (useful for cross-compiling)])], 73 [],[with_protoc=no]) 74 75# Checks for programs. 76AC_PROG_CC 77AC_PROG_CXX 78AC_PROG_CXX_FOR_BUILD 79AC_LANG([C++]) 80ACX_USE_SYSTEM_EXTENSIONS 81m4_ifdef([AM_PROG_AR], [AM_PROG_AR]) 82AM_CONDITIONAL(GCC, test "$GCC" = yes) # let the Makefile know if we're gcc 83AC_PROG_OBJC 84 85# test_util.cc takes forever to compile with GCC and optimization turned on. 86AC_MSG_CHECKING([C++ compiler flags...]) 87AS_IF([test "x${ac_cv_env_CXXFLAGS_set}" = "x"],[ 88 AS_IF([test "$GCC" = "yes"],[ 89 PROTOBUF_OPT_FLAG="-O2" 90 CXXFLAGS="${CXXFLAGS} -g" 91 ]) 92 93 # Protocol Buffers contains several checks that are intended to be used only 94 # for debugging and which might hurt performance. Most users are probably 95 # end users who don't want these checks, so add -DNDEBUG by default. 96 CXXFLAGS="$CXXFLAGS -std=c++11 -DNDEBUG" 97 98 AC_MSG_RESULT([use default: $PROTOBUF_OPT_FLAG $CXXFLAGS]) 99],[ 100 AC_MSG_RESULT([use user-supplied: $CXXFLAGS]) 101]) 102 103AC_SUBST(PROTOBUF_OPT_FLAG) 104 105ACX_CHECK_SUNCC 106 107# Have to do libtool after SUNCC, other wise it "helpfully" adds Crun Cstd 108# to the link 109AC_PROG_LIBTOOL 110 111# Check whether the linker supports version scripts 112AC_MSG_CHECKING([whether the linker supports version scripts]) 113save_LDFLAGS=$LDFLAGS 114LDFLAGS="$LDFLAGS -Wl,--version-script=conftest.map" 115cat > conftest.map <<EOF 116{ 117 global: 118 main; 119 local: 120 *; 121}; 122EOF 123AC_LINK_IFELSE( 124 [AC_LANG_SOURCE([int main() { return 0; }])], 125 [have_ld_version_script=yes; AC_MSG_RESULT(yes)], 126 [have_ld_version_script=no; AC_MSG_RESULT(no)]) 127LDFLAGS=$save_LDFLAGS 128AM_CONDITIONAL([HAVE_LD_VERSION_SCRIPT], [test "$have_ld_version_script" == "yes"]) 129 130# Checks for header files. 131AC_HEADER_STDC 132AC_CHECK_HEADERS([fcntl.h inttypes.h limits.h stdlib.h unistd.h]) 133 134# Checks for library functions. 135AC_FUNC_MEMCMP 136AC_FUNC_STRTOD 137AC_CHECK_FUNCS([ftruncate memset mkdir strchr strerror strtol]) 138 139# Check for zlib. 140HAVE_ZLIB=0 141AS_IF([test "$with_zlib" != no], [ 142 AC_MSG_CHECKING([zlib version]) 143 144 # First check the zlib header version. 145 AC_COMPILE_IFELSE( 146 [AC_LANG_PROGRAM([[ 147 #include <zlib.h> 148 #if !defined(ZLIB_VERNUM) || (ZLIB_VERNUM < 0x1204) 149 # error zlib version too old 150 #endif 151 ]], [])], [ 152 AC_MSG_RESULT([ok (1.2.0.4 or later)]) 153 154 # Also need to add -lz to the linker flags and make sure this succeeds. 155 AC_SEARCH_LIBS([zlibVersion], [z], [ 156 AC_DEFINE([HAVE_ZLIB], [1], [Enable classes using zlib compression.]) 157 HAVE_ZLIB=1 158 ], [ 159 AS_IF([test "$with_zlib" != check], [ 160 AC_MSG_FAILURE([--with-zlib was given, but no working zlib library was found]) 161 ]) 162 ]) 163 ], [ 164 AS_IF([test "$with_zlib" = check], [ 165 AC_MSG_RESULT([headers missing or too old (requires 1.2.0.4)]) 166 ], [ 167 AC_MSG_FAILURE([--with-zlib was given, but zlib headers were not present or were too old (requires 1.2.0.4)]) 168 ]) 169 ]) 170]) 171AM_CONDITIONAL([HAVE_ZLIB], [test $HAVE_ZLIB = 1]) 172 173# Add -std=c++11 if necesssary. It is important for us to do this before the 174# libatomic check below, since that also depends on C++11. 175AX_CXX_COMPILE_STDCXX([11], [noext], [mandatory]) 176 177dnl On some platforms, std::atomic needs a helper library 178AC_MSG_CHECKING(whether -latomic is needed) 179AC_LINK_IFELSE([AC_LANG_SOURCE([[ 180 #include <atomic> 181 #include <cstdint> 182 std::atomic<std::int64_t> v; 183 int main() { 184 return v; 185 } 186]])], STD_ATOMIC_NEED_LIBATOMIC=no, STD_ATOMIC_NEED_LIBATOMIC=yes) 187AC_MSG_RESULT($STD_ATOMIC_NEED_LIBATOMIC) 188if test "x$STD_ATOMIC_NEED_LIBATOMIC" = xyes; then 189 LIBATOMIC_LIBS="-latomic" 190fi 191AC_SUBST([LIBATOMIC_LIBS]) 192 193AS_IF([test "$with_protoc" != "no"], [ 194 PROTOC=$with_protoc 195 AS_IF([test "$with_protoc" = "yes"], [ 196 # No argument given. Use system protoc. 197 PROTOC=protoc 198 ]) 199 AS_IF([echo "$PROTOC" | grep -q '^@<:@^/@:>@.*/'], [ 200 # Does not start with a slash, but contains a slash. So, it's a relative 201 # path (as opposed to an absolute path or an executable in $PATH). 202 # Since it will actually be executed from the src directory, prefix with 203 # the current directory. We also insert $ac_top_build_prefix in case this 204 # is a nested package and --with-protoc was actually given on the outer 205 # package's configure script. 206 PROTOC=`pwd`/${ac_top_build_prefix}$PROTOC 207 ]) 208 AC_SUBST([PROTOC]) 209]) 210AM_CONDITIONAL([USE_EXTERNAL_PROTOC], [test "$with_protoc" != "no"]) 211 212AX_PTHREAD 213AM_CONDITIONAL([HAVE_PTHREAD], [test "x$ax_pthread_ok" = "xyes"]) 214# We still keep this for improving pbconfig.h for unsupported platforms. 215AC_CXX_STL_HASH 216 217# Enable ObjC support for conformance directory on OS X. 218OBJC_CONFORMANCE_TEST=0 219case "$target_os" in 220 darwin*) 221 OBJC_CONFORMANCE_TEST=1 222 ;; 223esac 224AM_CONDITIONAL([OBJC_CONFORMANCE_TEST], [test $OBJC_CONFORMANCE_TEST = 1]) 225 226# HACK: Make gmock's configure script pick up our copy of CFLAGS and CXXFLAGS, 227# since the flags added by ACX_CHECK_SUNCC must be used when compiling gmock 228# too. 229export CFLAGS 230export CXXFLAGS 231AC_CONFIG_SUBDIRS([third_party/googletest]) 232 233AC_CONFIG_FILES([Makefile src/Makefile benchmarks/Makefile conformance/Makefile protobuf.pc protobuf-lite.pc]) 234AC_OUTPUT 235