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