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configure.in: show error message if __sync_* atomic operations are not supported

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This commit is contained in:
frsyuki
2010-01-20 14:49:51 +09:00
parent d8212ad620
commit 2b72f35c32
1 changed files with 17 additions and 1 deletions
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18
configure.in
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@@ -24,7 +24,7 @@ if test "$enable_cxx" != "no"; then
fi
fi
# FIXME
# FIXME enable_cxx
AC_PROG_CXX
CXXFLAGS="-O4 -Wall $CXXFLAGS -I.. -I../c"
@@ -34,6 +34,22 @@ AC_CHECK_HEADERS(tr1/unordered_map)
AC_CHECK_HEADERS(tr1/unordered_set)
AC_LANG_POP([C++])
AC_CACHE_CHECK([for __sync_* atomic operations], msgpack_cv_atomic_ops, [
AC_TRY_LINK([
int atomic_sub(int i) { return __sync_sub_and_fetch(&i, 1); }
int atomic_add(int i) { return __sync_add_and_fetch(&i, 1); }
], [], msgpack_cv_atomic_ops="yes")
])
if test "$msgpack_cv_atomic_ops" != "yes"; then
AC_MSG_ERROR([__sync_* atomic operations are not supported.
Note that gcc < 4.1 is not supported.
If you are using gcc-4.1 and the CPU architecture is x86, try to add
CFLAGS"--march=i686" and CXXFLAGS="-march=i668" options to ./configure as follows:
$ ./configure CFLAGS="-march=i686" CXXFLAGS="-march=i686"
])
fi
AM_CONDITIONAL(ENABLE_CXX, test "$enable_cxx" != "no")
AC_PROG_LIBTOOL