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m4_define([snappy_major], [1])
m4_define([snappy_minor], [0])
m4_define([snappy_patchlevel], [5])
# Libtool shared library interface versions (current:revision:age)
# Update this value for every release! (A:B:C will map to foo.so.(A-C).C.B)
# http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
m4_define([snappy_ltversion], [2:3:1])
AC_INIT([snappy], [snappy_major.snappy_minor.snappy_patchlevel])
AC_CONFIG_MACRO_DIR([m4])
# These are flags passed to automake (though they look like gcc flags!)
AM_INIT_AUTOMAKE([-Wall -Werror])
LT_INIT
AC_SUBST([LIBTOOL_DEPS])
AC_PROG_CXX
AC_LANG([C++])
AC_C_BIGENDIAN
AC_CHECK_HEADERS([stdint.h stddef.h sys/mman.h sys/resource.h windows.h byteswap.h sys/byteswap.h sys/endian.h sys/time.h])
# Don't use AC_FUNC_MMAP, as it checks for mappings of already-mapped memory,
# which we don't need (and does not exist on Windows).
AC_CHECK_FUNC([mmap])
GTEST_LIB_CHECK([], [true], [true # Ignore; we can live without it.])
AC_ARG_WITH([gflags],
[AS_HELP_STRING(
[--with-gflags],
[use Google Flags package to enhance the unit test @<:@default=check@:>@])],
[],
[with_gflags=check])
if test "x$with_gflags" != "xno"; then
PKG_CHECK_MODULES(
[gflags],
[libgflags],
[AC_DEFINE([HAVE_GFLAGS], [1], [Use the gflags package for command-line parsing.])],
[if test "x$with_gflags" != "xcheck"; then
AC_MSG_FAILURE([--with-gflags was given, but test for gflags failed])
fi])
fi
# See if we have __builtin_expect.
# TODO: Use AC_CACHE.
AC_MSG_CHECKING([if the compiler supports __builtin_expect])
AC_TRY_COMPILE(, [
return __builtin_expect(1, 1) ? 1 : 0
], [
snappy_have_builtin_expect=yes
AC_MSG_RESULT([yes])
], [
snappy_have_builtin_expect=no
AC_MSG_RESULT([no])
])
if test x$snappy_have_builtin_expect = xyes ; then
AC_DEFINE([HAVE_BUILTIN_EXPECT], [1], [Define to 1 if the compiler supports __builtin_expect.])
fi
# See if we have working count-trailing-zeros intrinsics.
# TODO: Use AC_CACHE.
AC_MSG_CHECKING([if the compiler supports __builtin_ctzll])
AC_TRY_COMPILE(, [
return (__builtin_ctzll(0x100000000LL) == 32) ? 1 : 0
], [
snappy_have_builtin_ctz=yes
AC_MSG_RESULT([yes])
], [
snappy_have_builtin_ctz=no
AC_MSG_RESULT([no])
])
if test x$snappy_have_builtin_ctz = xyes ; then
AC_DEFINE([HAVE_BUILTIN_CTZ], [1], [Define to 1 if the compiler supports __builtin_ctz and friends.])
fi
# Other compression libraries; the unit test can use these for comparison
# if they are available. If they are not found, just ignore.
UNITTEST_LIBS=""
AC_DEFUN([CHECK_EXT_COMPRESSION_LIB], [
AH_CHECK_LIB([$1])
AC_CHECK_LIB(
[$1],
[$2],
[
AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_LIB$1))
UNITTEST_LIBS="-l$1 $UNITTEST_LIBS"
],
[true]
)
])
CHECK_EXT_COMPRESSION_LIB([z], [zlibVersion])
CHECK_EXT_COMPRESSION_LIB([lzo2], [lzo1x_1_15_compress])
CHECK_EXT_COMPRESSION_LIB([lzf], [lzf_compress])
CHECK_EXT_COMPRESSION_LIB([fastlz], [fastlz_compress])
CHECK_EXT_COMPRESSION_LIB([quicklz], [qlz_compress])
AC_SUBST([UNITTEST_LIBS])
# These are used by snappy-stubs-public.h.in.
if test "$ac_cv_header_stdint_h" = "yes"; then
AC_SUBST([ac_cv_have_stdint_h], [1])
else
AC_SUBST([ac_cv_have_stdint_h], [0])
fi
if test "$ac_cv_header_stddef_h" = "yes"; then
AC_SUBST([ac_cv_have_stddef_h], [1])
else
AC_SUBST([ac_cv_have_stddef_h], [0])
fi
# Export the version to snappy-stubs-public.h.
SNAPPY_MAJOR="snappy_major"
SNAPPY_MINOR="snappy_minor"
SNAPPY_PATCHLEVEL="snappy_patchlevel"
AC_SUBST([SNAPPY_MAJOR])
AC_SUBST([SNAPPY_MINOR])
AC_SUBST([SNAPPY_PATCHLEVEL])
AC_SUBST([SNAPPY_LTVERSION], snappy_ltversion)
AC_CONFIG_HEADERS([config.h])
AC_CONFIG_FILES([Makefile snappy-stubs-public.h])
AC_OUTPUT
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