X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=aclocal.m4;h=1ca1ec6869b042ca16a76ba6150a782836187dbb;hp=c50d3481daafe08b575fd91c17d917d5088129ac;hb=e24638cf715a67d087cac3d6a8d979f76f957c62;hpb=6bb8d64a971afce310df3349e8767b790c2845ee

diff --git a/aclocal.m4 b/aclocal.m4
index c50d348..1ca1ec6 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -31,7 +31,25 @@ AC_DEFUN([FPTOOLS_SET_C_LD_FLAGS],
     then
         $2="$$2 -fno-stack-protector"
     fi
-    rm conftest.c conftest.o
+    rm -f conftest.c conftest.o
+])
+
+
+# FP_VISIBILITY_HIDDEN
+# ----------------------------------
+# Is the visibility hidden attribute supported?
+AC_DEFUN([FP_VISIBILITY_HIDDEN],
+[
+    AC_MSG_CHECKING([whether __attribute__((visibility("hidden"))) is supported])
+    echo '__attribute__((visibility("hidden"))) void foo(void) {}' > conftest.c
+    if $CC -Wall -Werror -c conftest.c > /dev/null 2>&1
+    then
+        AC_MSG_RESULT([yes])
+        AC_DEFINE(HAS_VISIBILITY_HIDDEN, 1, [Has visibility hidden])
+    else
+        AC_MSG_RESULT([no])
+    fi
+    rm -f conftest.c conftest.o
 ])