[PATCH 1/8] opensm/configure.in: check that compiler supports __builtin_expect()
From: Yevgeny Kliteynik <hidden>
Date: 2012-08-14 21:30:22
Subsystem:
the rest · Maintainer:
Linus Torvalds
Signed-off-by: Yevgeny Kliteynik <redacted> --- configure.in | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/configure.in b/configure.in
index e48c066..eb252ff 100644
--- a/configure.in
+++ b/configure.in@@ -56,6 +56,17 @@ AC_HEADER_TIME AC_STRUCT_TM AC_C_VOLATILE +dnl See if we have __builtin_expect +AC_MSG_CHECKING([if the compiler supports __builtin_expect]) +AC_TRY_COMPILE(, [ return __builtin_expect(1, 1) ? 1 : 0], + [ have_builtin_expect=yes + AC_MSG_RESULT([yes]) ], + [ have_builtin_expect=no + AC_MSG_RESULT([no]) ]) +if test "x_$have_builtin_expect" = "x_yes" ; then + AC_DEFINE([HAVE_BUILTIN_EXPECT], [1], [Define to 1 if the compiler supports __builtin_expect.]) +fi + dnl We use --version-script with ld if possible AC_CACHE_CHECK(whether ld accepts --version-script, ac_cv_version_script, if test -n "`$LD --help < /dev/null 2>/dev/null | grep version-script`"; then
--
1.7.11.1
--
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