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From: Marc Kleine-Budde <mkl@pengutronix.de>
Date: Fri, 24 Apr 2009 18:44:11 +0200
Subject: [PATCH] use AC_CHECK_SIZEOF rather than AC_TRY_COMPILE for long long
detection
AC_CHECK_SIZEOF does first detect if the type is available and detects
its size. Use it, rather than hand crafted function with AC_TRY_COMPILE.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
configure.ac | 12 ++++--------
1 file changed, 4 insertions(+), 8 deletions(-)
diff --git a/configure.ac b/configure.ac
index 675f56835e59..c9cb9c802882 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1883,15 +1883,11 @@ AC_CHECK_SIZEOF(fpos_t, 4)
AC_CHECK_SIZEOF(size_t, 4)
AC_CHECK_SIZEOF(pid_t, 4)
-AC_MSG_CHECKING(for long long support)
-have_long_long=no
-AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[long long x; x = (long long)0;]])],[
- AC_DEFINE(HAVE_LONG_LONG, 1, [Define this if you have the type long long.])
+AC_TYPE_LONG_LONG_INT
+AC_CHECK_SIZEOF(long long)
+if test "$ac_cv_type_long_long_int" = "yes" ; then
have_long_long=yes
-],[])
-AC_MSG_RESULT($have_long_long)
-if test "$have_long_long" = yes ; then
-AC_CHECK_SIZEOF(long long, 8)
+ AC_DEFINE(HAVE_LONG_LONG, 1, [Define this if you have the type long long.])
fi
AC_MSG_CHECKING(for long double support)
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