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configure.in: fix message

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frsyuki 2010-01-21 17:25:32 +09:00
parent 2b72f35c32
commit c69092e110
1 changed files with 10 additions and 8 deletions
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18
configure.in
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@ -35,16 +35,18 @@ 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")
])
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.
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:
If you are using gcc >= 4.1 and the default target CPU architecture is "i386", try to
add CFLAGS="--march=i686" and CXXFLAGS="-march=i668" options to ./configure as follows:
$ ./configure CFLAGS="-march=i686" CXXFLAGS="-march=i686"
])