From 40b601fbb774cd2be2f6cbe7155570340fc475a2 Mon Sep 17 00:00:00 2001
From: Joseph Myers <joseph@codesourcery.com>
Date: Wed, 21 Mar 2012 16:33:57 +0000
Subject: [PATCH] Use autoconf macro for testing compiler options with empty
 input.

---
 ChangeLog                 | 12 ++++++++++++
 aclocal.m4                |  6 ++++++
 configure                 |  5 +++--
 configure.in              |  5 ++---
 sysdeps/i386/configure    | 18 ++++++++++++------
 sysdeps/i386/configure.in | 48 ++++++++++++++++++-----------------------------
 6 files changed, 53 insertions(+), 41 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index ebffe4f..1daf831 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,17 @@
 2012-03-21  Joseph Myers  <joseph@codesourcery.com>
 
+	* aclocal.m4 (LIBC_TRY_CC_OPTION): New macro.
+	* configure.in (libc_cv_cc_submachine): Use LIBC_TRY_CC_OPTION.
+	* configure: Regenerated.
+	* sysdeps/i386/configure.in (libc_cv_cc_sse4): Use
+	LIBC_TRY_CC_OPTION.
+	(libc_cv_as_i686): Likewise.
+	(libc_cv_cc_avx): Likewise.
+	(libc_cv_cc_sse2avx): Likewise.
+	(libc_cv_cc_fma4): Likewise.
+	(libc_cv_cc_novzeroupper): Likewise.
+	* sysdeps/i386/configure: Regenerated.
+
 	[BZ #13883]
 	* sysdeps/i386/fpu/s_cexp.S: Remove.
 	* sysdeps/i386/fpu/s_cexpf.S: Likewise.
diff --git a/aclocal.m4 b/aclocal.m4
index fb546e4..e899932 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -128,6 +128,12 @@ AS_IF([AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest
       [$2], [$3])
 rm -f conftest*])
 
+dnl Test a compiler option or options with an empty input file.
+dnl LIBC_TRY_CC_OPTION([options], [action-if-true], [action-if-false])
+AC_DEFUN([LIBC_TRY_CC_OPTION],
+[AS_IF([AC_TRY_COMMAND([${CC-cc} $1 -xc /dev/null -S -o /dev/null])],
+	[$2], [$3])])
+
 dnl Find and source sysdeps/*/preconfigure.
 dnl LIBC_PRECONFIGURE([$srcdir], [for])
 AC_DEFUN([LIBC_PRECONFIGURE], [dnl
diff --git a/configure b/configure
index 3eb7cf1..dc50c16 100755
--- a/configure
+++ b/configure
@@ -7054,10 +7054,11 @@ else
   (eval $ac_try) 2>&5
   ac_status=$?
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; }; then
+  test $ac_status = 0; }; }; then :
+
       libc_cv_cc_submachine="$opt"
       break
-    fi
+fi
   done
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_submachine" >&5
diff --git a/configure.in b/configure.in
index ee5e856..bb3b057 100644
--- a/configure.in
+++ b/configure.in
@@ -2005,10 +2005,9 @@ if test -n "$submachine"; then
 		 libc_cv_cc_submachine, [dnl
   libc_cv_cc_submachine=no
   for opt in "-march=$submachine" "-mcpu=$submachine"; do
-    if AC_TRY_COMMAND([${CC-cc} $opt -xc /dev/null -S -o /dev/null]); then
+    LIBC_TRY_CC_OPTION([$opt], [
       libc_cv_cc_submachine="$opt"
-      break
-    fi
+      break], [])
   done])
   if test "x$libc_cv_cc_submachine" = xno; then
     AC_MSG_ERROR([${CC-cc} does not support $submachine])
diff --git a/sysdeps/i386/configure b/sysdeps/i386/configure
index 49330e3..baa6609 100644
--- a/sysdeps/i386/configure
+++ b/sysdeps/i386/configure
@@ -223,11 +223,12 @@ else
   (eval $ac_try) 2>&5
   ac_status=$?
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; }; then
+  test $ac_status = 0; }; }; then :
   libc_cv_cc_sse4=yes
 else
   libc_cv_cc_sse4=no
 fi
+
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_sse4" >&5
 $as_echo "$libc_cv_cc_sse4" >&6; }
@@ -246,11 +247,12 @@ else
   (eval $ac_try) 2>&5
   ac_status=$?
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; }; then
+  test $ac_status = 0; }; }; then :
   libc_cv_as_i686=yes
 else
   libc_cv_as_i686=no
 fi
+
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_as_i686" >&5
 $as_echo "$libc_cv_as_i686" >&6; }
@@ -265,11 +267,12 @@ else
   (eval $ac_try) 2>&5
   ac_status=$?
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; }; then
+  test $ac_status = 0; }; }; then :
   libc_cv_cc_avx=yes
 else
   libc_cv_cc_avx=no
 fi
+
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_avx" >&5
 $as_echo "$libc_cv_cc_avx" >&6; }
@@ -288,11 +291,12 @@ else
   (eval $ac_try) 2>&5
   ac_status=$?
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; }; then
+  test $ac_status = 0; }; }; then :
   libc_cv_cc_sse2avx=yes
 else
   libc_cv_cc_sse2avx=no
 fi
+
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_sse2avx" >&5
 $as_echo "$libc_cv_cc_sse2avx" >&6; }
@@ -311,11 +315,12 @@ else
   (eval $ac_try) 2>&5
   ac_status=$?
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; }; then
+  test $ac_status = 0; }; }; then :
   libc_cv_cc_fma4=yes
 else
   libc_cv_cc_fma4=no
 fi
+
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_fma4" >&5
 $as_echo "$libc_cv_cc_fma4" >&6; }
@@ -334,11 +339,12 @@ else
   (eval $ac_try) 2>&5
   ac_status=$?
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; }; then
+  test $ac_status = 0; }; }; then :
   libc_cv_cc_novzeroupper=yes
 else
   libc_cv_cc_novzeroupper=no
 fi
+
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_novzeroupper" >&5
 $as_echo "$libc_cv_cc_novzeroupper" >&6; }
diff --git a/sysdeps/i386/configure.in b/sysdeps/i386/configure.in
index f769019..7b4879d 100644
--- a/sysdeps/i386/configure.in
+++ b/sysdeps/i386/configure.in
@@ -40,60 +40,48 @@ fi
 
 dnl Check if -msse4 works.
 AC_CACHE_CHECK(for SSE4 support, libc_cv_cc_sse4, [dnl
-if AC_TRY_COMMAND([${CC-cc} -msse4 -xc /dev/null -S -o /dev/null]); then
-  libc_cv_cc_sse4=yes
-else
-  libc_cv_cc_sse4=no
-fi])
+LIBC_TRY_CC_OPTION([-msse4], [libc_cv_cc_sse4=yes], [libc_cv_cc_sse4=no])
+])
 if test $libc_cv_cc_sse4 = yes; then
   AC_DEFINE(HAVE_SSE4_SUPPORT)
 fi
 
 dnl Check if -Wa,-mtune=i686 works.
 AC_CACHE_CHECK(for assembler -mtune=i686 support, libc_cv_as_i686, [dnl
-if AC_TRY_COMMAND([${CC-cc} -Wa,-mtune=i686 -xc /dev/null -S -o /dev/null]); then
-  libc_cv_as_i686=yes
-else
-  libc_cv_as_i686=no
-fi])
+LIBC_TRY_CC_OPTION([-Wa,-mtune=i686],
+		   [libc_cv_as_i686=yes],
+		   [libc_cv_as_i686=no])
+])
 
 dnl Check if -mavx works.
 AC_CACHE_CHECK(for AVX support, libc_cv_cc_avx, [dnl
-if AC_TRY_COMMAND([${CC-cc} -mavx -xc /dev/null -S -o /dev/null]); then
-  libc_cv_cc_avx=yes
-else
-  libc_cv_cc_avx=no
-fi])
+LIBC_TRY_CC_OPTION([-mavx], [libc_cv_cc_avx=yes], [libc_cv_cc_avx=no])
+])
 if test $libc_cv_cc_avx = yes; then
   AC_DEFINE(HAVE_AVX_SUPPORT)
 fi
 
 dnl Check if -msse2avx works.
 AC_CACHE_CHECK(for AVX encoding of SSE instructions, libc_cv_cc_sse2avx, [dnl
-if AC_TRY_COMMAND([${CC-cc} -msse2avx -xc /dev/null -S -o /dev/null]); then
-  libc_cv_cc_sse2avx=yes
-else
-  libc_cv_cc_sse2avx=no
-fi])
+LIBC_TRY_CC_OPTION([-msse2avx],
+		   [libc_cv_cc_sse2avx=yes],
+		   [libc_cv_cc_sse2avx=no])
+])
 if test $libc_cv_cc_sse2avx = yes; then
   AC_DEFINE(HAVE_SSE2AVX_SUPPORT)
 fi
 
 dnl Check if -mfma4 works.
 AC_CACHE_CHECK(for FMA4 support, libc_cv_cc_fma4, [dnl
-if AC_TRY_COMMAND([${CC-cc} -mfma4 -xc /dev/null -S -o /dev/null]); then
-  libc_cv_cc_fma4=yes
-else
-  libc_cv_cc_fma4=no
-fi])
+LIBC_TRY_CC_OPTION([-mfma4], [libc_cv_cc_fma4=yes], [libc_cv_cc_fma4=no])
+])
 if test $libc_cv_cc_fma4 = yes; then
   AC_DEFINE(HAVE_FMA4_SUPPORT)
 fi
 
 dnl Check if -mno-vzeroupper works.
 AC_CACHE_CHECK(for -mno-vzeroupper support, libc_cv_cc_novzeroupper, [dnl
-if AC_TRY_COMMAND([${CC-cc} -mno-vzeroupper -xc /dev/null -S -o /dev/null]); then
-  libc_cv_cc_novzeroupper=yes
-else
-  libc_cv_cc_novzeroupper=no
-fi])
+LIBC_TRY_CC_OPTION([-mno-vzeroupper],
+		   [libc_cv_cc_novzeroupper=yes],
+		   [libc_cv_cc_novzeroupper=no])
+])
-- 
2.7.4