File 0001-S390-Configure-check-for-vector-support-in-gcc.patch of Package glibc.18277

2016-05-25  Stefan Liebler  <stli@linux.vnet.ibm.com>

	* config.h.in (HAVE_S390_VX_GCC_SUPPORT): New macro undefine.
	* sysdeps/s390/configure.ac: Add test for S390 vector register
	support in gcc.
	* sysdeps/s390/configure: Regenerated.

Index: glibc-2.22/config.h.in
===================================================================
--- glibc-2.22.orig/config.h.in
+++ glibc-2.22/config.h.in
@@ -94,6 +94,10 @@
 /* Define if assembler supports vector instructions on S390.  */
 #undef  HAVE_S390_VX_ASM_SUPPORT
 
+/* Define if gcc supports vector registers as clobbers in inline assembly
+   on S390.  */
+#undef  HAVE_S390_VX_GCC_SUPPORT
+
 /* Define if assembler supports Intel MPX.  */
 #undef  HAVE_MPX_SUPPORT
 
Index: glibc-2.22/sysdeps/s390/configure
===================================================================
--- glibc-2.22.orig/sysdeps/s390/configure
+++ glibc-2.22/sysdeps/s390/configure
@@ -68,6 +68,38 @@ if test $ac_verc_fail = yes; then
 fi
 
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for S390 vector support in gcc" >&5
+$as_echo_n "checking for S390 vector support in gcc... " >&6; }
+if ${libc_cv_gcc_s390_vx+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat > conftest.c <<\EOF
+void testvecclobber ()
+{
+  __asm__ ("" : : : "v16");
+}
+EOF
+if { ac_try='${CC-cc} --shared conftest.c -o conftest.o &> /dev/null'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; } ;
+then
+  libc_cv_gcc_s390_vx=yes
+else
+  libc_cv_gcc_s390_vx=no
+fi
+rm -f conftest*
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_gcc_s390_vx" >&5
+$as_echo "$libc_cv_gcc_s390_vx" >&6; }
+
+if test "$libc_cv_gcc_s390_vx" = yes ;
+then
+  $as_echo "#define HAVE_S390_VX_GCC_SUPPORT 1" >>confdefs.h
+
+fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for __builtin_tbegin" >&5
 $as_echo_n "checking for __builtin_tbegin... " >&6; }
Index: glibc-2.22/sysdeps/s390/configure.ac
===================================================================
--- glibc-2.22.orig/sysdeps/s390/configure.ac
+++ glibc-2.22/sysdeps/s390/configure.ac
@@ -10,6 +10,27 @@ AC_CHECK_PROG_VER(AS, $AS, --version,
 		  [GNU assembler.* \([0-9]*\.[0-9.]*\)],
 		  [2.2[4-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*], critic_missing="$critic_missing The program AS is required in version >= 2.24 for target S390.")
 
+AC_CACHE_CHECK(for S390 vector support in gcc, libc_cv_gcc_s390_vx, [dnl
+cat > conftest.c <<\EOF
+void testvecclobber ()
+{
+  __asm__ ("" : : : "v16");
+}
+EOF
+dnl
+dnl test, if gcc supports S390 vector registers as clobber in inline assembly
+if AC_TRY_COMMAND([${CC-cc} --shared conftest.c -o conftest.o &> /dev/null]) ;
+then
+  libc_cv_gcc_s390_vx=yes
+else
+  libc_cv_gcc_s390_vx=no
+fi
+rm -f conftest* ])
+
+if test "$libc_cv_gcc_s390_vx" = yes ;
+then
+  AC_DEFINE(HAVE_S390_VX_GCC_SUPPORT)
+fi
 
 AC_CACHE_CHECK(for __builtin_tbegin, libc_cv_gcc_builtin_tbegin, [dnl
 cat > conftest.c <<\EOF