From 867d9158bca053090c8a815e163fa303fad6a4fb Mon Sep 17 00:00:00 2001
From: Arturo Espinosa <unammx@src.gnome.org>
Date: Wed, 11 Feb 1998 01:37:05 +0000
Subject: Gnome Utils autoconf/automake setup is ready

svn path=/trunk/; revision=12
---
 macros/gnome-objc-checks.m4 | 58 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 macros/gnome-objc-checks.m4

(limited to 'macros/gnome-objc-checks.m4')

diff --git a/macros/gnome-objc-checks.m4 b/macros/gnome-objc-checks.m4
new file mode 100644
index 0000000000..603909e3f8
--- /dev/null
+++ b/macros/gnome-objc-checks.m4
@@ -0,0 +1,58 @@
+AC_DEFUN([GNOME_CHECK_OBJC],
+[
+	dnl Look for an ObjC compiler.
+	dnl FIXME: extend list of possible names of ObjC compilers.
+	AC_CHECK_PROGS(OBJC, $OBJC gcc, "")
+
+	dnl See if it works
+	dnl FIXME: I don't know ObjC.  I took hints from *.m files 
+	dnl already in the gnome tree.  But this one compiles, and looks 
+	dnl for pthread libs, when linked. (Raja Harinath)
+
+	dnl The ObjC library, with threads enabled, uses sched_yield, which,
+	dnl on Solaris is in -lposix4.  For now, I just put -lposix4 into 
+	dnl PTHREAD_LIB: it is as good a place as any.  Maybe there should
+	dnl be an OBJC_LIBS.
+	oLIBS=$LIBS
+	LIBS="$LIBS $PTHREAD_LIB"
+	AC_CHECK_FUNC(sched_yield,,[
+	  AC_CHECK_LIB(posix4,sched_yield,PTHREAD_LIB="$PTHREAD_LIB -lposix4")])
+	LIBS=$oLIBS
+
+	AC_CACHE_CHECK([if Objective C compiler ($OBJC) works],
+		       ac_cv_prog_objc_works, [
+	if test -n "$OBJC"; then
+	   cat > conftest.m <<EOF
+	#include <objc/Object.h>
+	@interface myRandomObj : Object
+	{
+	}
+	@end
+	@implementation myRandomObj
+	@end
+	int main () {
+	  /* No, you are not seeing double.  Remember that square brackets
+	     are the autoconf m4 quotes.  */
+	  id myid = [[myRandomObj alloc]];
+	  [[myid free]];
+	  return 0;
+	}
+
+	EOF
+	   dnl FIXME: internal autoconf knowledge here.  Really we should copy
+	   dnl autoconf's C++ support for ObjC. (Tom Tromey)
+	   $OBJC -o conftest $LDFLAGS conftest.m -lobjc $PTHREAD_LIB 1>&AC_FD_CC 2>&1
+	   result=$?
+	   rm -f conftest*
+
+	   if test $result -eq 0; then
+	      ac_cv_prog_objc_works=yes
+	   fi
+	else
+	   ac_cv_prog_objc_works=no
+	fi
+	dnl End of AC_CACHE_CHECK
+	])
+
+	AM_CONDITIONAL(OBJECTIVE_C, test x$ac_cv_prog_objc_works = xyes)
+])
-- 
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