Merge pull request #1056 from ranma42/vc-compat-C90

[mono.git] / libgc / configure.in

diff --git a/libgc/configure.in b/libgc/configure.in
index 18d1179f16895cb7c6e6c17872434dc2ad4eeb89..837e2cb9f158c14f8cdbe47e0abc14091db14edf 100644 (file)
--- a/libgc/configure.in
+++ b/libgc/configure.in
@@ -28,6 +28,8 @@ AC_SUBST(GC_VERSION)
 AC_PROG_CC
 AC_PROG_CXX
 
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
+
 dnl automake 1.6 and later need the AM_PROG_AS macro.
 ifdef([AM_PROG_AS],[AM_PROG_AS],[])
 AC_CHECK_TOOL(AR, ar)
@@ -215,6 +217,22 @@ case "$host" in
 esac
 AM_CONDITIONAL(POWERPC_DARWIN,test x$powerpc_darwin = xtrue)
 
+# Check if the GCC builtin __sync_bool_compare_and_swap is available.
+# It is preferred in gc_locks.h for PPC as GCC 4.4 has a problem with the inline assembly there.
+AC_MSG_CHECKING(for __sync_bool_compare_and_swap)
+AC_TRY_COMPILE([],[
+volatile unsigned int foo = 0;
+int main(int argc, char** argv) {
+    unsigned int r1 = __sync_bool_compare_and_swap(&foo, 0, 1);
+    return 0;
+}
+], [
+AC_MSG_RESULT(yes)
+AC_DEFINE(HAS___SYNC_BOOL_COMPARE_AND_SWAP)
+], [
+AC_MSG_RESULT(no)
+])
+
 AC_MSG_CHECKING(for xlc)
 AC_TRY_COMPILE([],[
  #ifndef __xlC__
@@ -519,11 +537,6 @@ else
   multilib_arg=
 fi
 
-if test x$enable_quiet_build = xyes; then
-   AC_CONFIG_COMMANDS([quiet], [for i in `find . -name Makefile.in | sed -e 's/Makefile.in/Makefile/g'`; do if test -f $i; then $srcdir/../scripts/patch-quiet.sh $i; fi; done], [shell=$SHELL])
-   AC_CONFIG_COMMANDS([quiet-libtool], [sed -e 's/$echo "copying selected/$show "copying selected/g' < libtool > libtool.tmp && mv libtool.tmp libtool && chmod a+x libtool; sed -e 's/$ECHO "copying selected/# "copying selected/g' < libtool > libtool.tmp && mv libtool.tmp libtool && chmod a+x libtool])
-fi
-
 AC_OUTPUT(Makefile
 m4/Makefile
 include/Makefile