coarray_43.f90: Add "-latomic" option if libatomic_available.

[gcc.git] / libatomic / acinclude.m4

diff --git a/libatomic/acinclude.m4 b/libatomic/acinclude.m4
index 13206f0a2a654ae7ed115d38f6055a51ee302314..485d731df55177afbe5c05c21fc7ac6661b5e0cc 100644 (file)
--- a/libatomic/acinclude.m4
+++ b/libatomic/acinclude.m4
@@ -67,13 +67,15 @@ AC_DEFUN([LIBAT_TEST_ATOMIC_BUILTIN],[
     else
       old_CFLAGS="$CFLAGS"
       # Compile unoptimized.
-      CFLAGS='-O0 -S'
+      CFLAGS="$CFLAGS -O0 -S"
       if AC_TRY_EVAL(ac_compile); then
         if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
          eval $2=no
         else
          eval $2=yes
         fi
+      else
+        eval $2=no
       fi
       CFLAGS="$old_CFLAGS"
     fi
@@ -94,6 +96,7 @@ AC_DEFUN([LIBAT_HAVE_ATOMIC_LOADSTORE],[
   LIBAT_DEFINE_YESNO([HAVE_ATOMIC_LDST_$2], [$libat_cv_have_at_ldst_$2],
        [Have __atomic_load/store for $2 byte integers.])
   AH_BOTTOM([#define MAYBE_HAVE_ATOMIC_LDST_$2 HAVE_ATOMIC_LDST_$2])
+  AH_BOTTOM([#define FAST_ATOMIC_LDST_$2 HAVE_ATOMIC_LDST_$2])
 ])
 
 dnl
@@ -183,10 +186,11 @@ AC_DEFUN([LIBAT_WORDSIZE],[
 ])
 
 dnl
-dnl Check whether the target supports ifuncs.
+dnl Check whether the target supports the ifunc attribute.
 dnl
 AC_DEFUN([LIBAT_CHECK_IFUNC], [
-  AC_CACHE_CHECK([whether the target supports funcs], libat_cv_have_ifunc, [
+  AC_CACHE_CHECK([whether the target supports the ifunc attribute],
+                libat_cv_have_ifunc, [
   save_CFLAGS="$CFLAGS"
   CFLAGS="$CFLAGS -Werror"
   AC_TRY_LINK([