mirror of
https://github.com/protobuf-c/protobuf-c.git
synced 2024-12-27 22:01:02 +08:00
fd50e6ae89
git-svn-id: https://protobuf-c.googlecode.com/svn/trunk@175 00440858-1255-0410-a3e6-75ea37f81c3a
97 lines
3.2 KiB
Plaintext
97 lines
3.2 KiB
Plaintext
AC_INIT(src/google/protobuf-c/protobuf-c.h)
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PROTOBUF_C_VERSION=0.9beta1
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AM_INIT_AUTOMAKE(protobuf-c, $PROTOBUF_C_VERSION)
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PACKAGE=protobuf-c
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AC_PROG_CC
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AC_PROG_CXX
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AC_PROG_LIBTOOL
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AC_PATH_PROG(PROTOC, protoc)
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AC_CHECK_HEADERS(inttypes.h)
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# --- Check for the protobuf library. ---
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AC_LANG_PUSH([C++])
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AC_CHECK_HEADER(google/protobuf/stubs/common.h,,
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[AC_MSG_ERROR([
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ERROR: protobuf headers are required.
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You must either install protobuf from google,
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or if you have it installed in a custom location
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you must add '-Iincludedir' to CXXFLAGS
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and '-Llibdir' to LDFLAGS.
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])])
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pbc_savelibs="$LIBS"
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LIBS="$LIBS -lprotoc"
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AC_TRY_LINK([#include <google/protobuf/compiler/command_line_interface.h>],
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[google::protobuf::compiler::CommandLineInterface cli;],
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[],
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[AC_MSG_ERROR([
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ERROR:
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protobuf test program failed to link:
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perhaps you need to add -Llibdir to your LDFLAGS.])])
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LIBS="$pbc_savelibs"
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AC_LANG_POP()
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dnl ------ define IS_LITTLE_ENDIAN ------
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# We try to use, where possible the headers <endian.h>, <mach/endian.h>,
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# and <machine/endian.h>, in that order. They must define the macros
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# __LITTLE_ENDIAN and __BYTE_ORDER. We structure the test so that if they
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# do NOT define __LITTLE_ENDIAN or __BYTE_ORDER then we will disable
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# the little-endian optimizations, so the resulting code should be correct,
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# but not as fast, if there's a broken endian.h somewhere.
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#
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# If none of those headers exist, we fallback on a runtime test.
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# TODO: support --with-endianness=[little|big]
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knows_endianness=0
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AC_CHECK_HEADERS([endian.h], [has_endian_h=1; knows_endianness=1], [has_endian_h=0])
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if test $knows_endianness = 1 ; then
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AC_TRY_COMPILE([#include <endian.h>], [
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switch (1) { case __LITTLE_ENDIAN: break;
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case __BYTE_ORDER: break; } ],
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[is_little_endian=0], [is_little_endian=1])
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else
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# ------------------ try <mach/endian.h> ------------------
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AC_CHECK_HEADERS([mach/endian.h], [has_mach_endian_h=1; knows_endianness=1], [has_mach_endian_h=0])
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if test $knows_endianness = 1 ; then
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AC_TRY_COMPILE([#include <mach/endian.h>],[
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switch (1) { case __LITTLE_ENDIAN: break;
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case __BYTE_ORDER: break; }
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],
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[is_little_endian=0], [is_little_endian=1])
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fi
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# ------------------ try <machine/endian.h> ------------------
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if test $knows_endianness = 0; then
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AC_CHECK_HEADERS([machine/endian.h], [has_machine_endian_h=1; knows_endianness=1], [has_machine_endian_h=0])
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if test $knows_endianness = 1 ; then
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AC_TRY_COMPILE([#include <machine/endian.h>],[
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switch (1) { case __LITTLE_ENDIAN: break;
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case __BYTE_ORDER: break; }
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],
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[is_little_endian=0], [is_little_endian=1])
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fi
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fi
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if test $knows_endianness = 0; then
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AC_MSG_CHECKING([for little-endianness via runtime check])
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AC_RUN_IFELSE([#include <inttypes.h>
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int main() {
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uint32_t v = 0x01020304;
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return memcmp (&v, "\4\3\2\1", 4) == 0 ? 0 : 1;
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}
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], [is_little_endian=1; result=yes], [is_little_endian=0; result=no])
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AC_MSG_RESULT($result)
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fi
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fi
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if test $is_little_endian = 1; then
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echo "Your system IS little-endian" 1>&2
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else
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echo "Your system IS NOT little-endian" 1>&2
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fi
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AC_DEFINE_UNQUOTED(IS_LITTLE_ENDIAN, $is_little_endian)
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AC_OUTPUT( Makefile src/Makefile src/test/Makefile pkgwriteinfo )
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