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],[2.3.0],[protobuf@googlegroups.com],[protobuf])
16
17
18AC_CONFIG_SRCDIR(src/google/protobuf/message.cc)
19AC_CONFIG_HEADERS([config.h])
20AC_CONFIG_MACRO_DIR([m4])
21
22# autoconf's default CXXFLAGS are usually "-g -O2".  These aren't necessarily
23# the best choice for libprotobuf.
24AS_IF([test "x${ac_cv_env_CFLAGS_set}" = "x"],
25      [CFLAGS=""])
26AS_IF([test "x${ac_cv_env_CXXFLAGS_set}" = "x"],
27      [CXXFLAGS=""])
28
29AC_CANONICAL_TARGET
30
31AM_INIT_AUTOMAKE
32
33AC_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
38AC_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.
44AC_PROG_CC
45AC_PROG_CXX
46AC_LANG([C++])
47ACX_USE_SYSTEM_EXTENSIONS
48AM_CONDITIONAL(GCC, test "$GCC" = yes)   # let the Makefile know if we're gcc
49
50# test_util.cc takes forever to compile with GCC and optimization turned on.
51AC_MSG_CHECKING([C++ compiler flags...])
52AS_IF([test "x${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: $CXXFLAGS])
66])
67
68AC_SUBST(PROTOBUF_OPT_FLAG)
69
70ACX_CHECK_SUNCC
71
72# Have to do libtool after SUNCC, other wise it "helpfully" adds Crun Cstd
73# to the link
74AC_PROG_LIBTOOL
75
76# Checks for header files.
77AC_HEADER_STDC
78AC_CHECK_HEADERS([fcntl.h inttypes.h limits.h stdlib.h unistd.h])
79
80# Checks for library functions.
81AC_FUNC_MEMCMP
82AC_FUNC_STRTOD
83AC_CHECK_FUNCS([ftruncate memset mkdir strchr strerror strtol])
84
85# Check for zlib.
86HAVE_ZLIB=0
87AS_IF([test "$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])
117AM_CONDITIONAL([HAVE_ZLIB], [test $HAVE_ZLIB = 1])
118
119AS_IF([test "$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}$PROTOC
133  ])
134  AC_SUBST([PROTOC])
135])
136AM_CONDITIONAL([USE_EXTERNAL_PROTOC], [test "$with_protoc" != "no"])
137
138ACX_PTHREAD
139AC_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.
144export CFLAGS
145export CXXFLAGS
146AC_CONFIG_SUBDIRS([gtest])
147
148AC_CONFIG_FILES([Makefile src/Makefile protobuf.pc protobuf-lite.pc])
149AC_OUTPUT
150