autosetup fix for -gstabs on newer Darwin

0001-Some-versions-of-cc-on-Darwin-don-t-support-gstabs.patch

From d55926cb188d39bb0466490aedd3d9f3b5894178 Mon Sep 17 00:00:00 2001
From: Steve Bennett <steveb@workware.net.au>
Date: Wed, 20 Mar 2013 14:23:17 +1000
Subject: [PATCH] Some versions of cc on Darwin don't support -gstabs

Reported-by: ksjogo
Signed-off-by: Steve Bennett <steveb@workware.net.au>
---
 lib/cc.tcl |   18 +++++++++++-------
 1 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/lib/cc.tcl b/lib/cc.tcl
index 7410d60..cd033c6 100644
--- a/lib/cc.tcl
+++ b/lib/cc.tcl
@@ -501,14 +501,8 @@ proc cctest {args} {
 		set tmp conftest__.o
 		lappend cmdline -c
 	}
-	lappend cmdline {*}$opts(-cflags)
+	lappend cmdline {*}$opts(-cflags) {*}[get-define cc-default-debug ""]
 
-	switch -glob -- [get-define host] {
-		*-*-darwin* {
-			# Don't generate .dSYM directories
-			lappend cmdline -gstabs
-		}
-	}
 	lappend cmdline $src -o $tmp {*}$opts(-libs)
 
 	# At this point we have the complete command line and the
@@ -688,6 +682,16 @@ if {[get-define CXX] ne "false"} {
 }
 msg-result "Build C compiler...[get-define CC_FOR_BUILD]"
 
+# On Darwin, we prefer to use -gstabs to avoid creating .dSYM directories
+# but some compilers don't support -gstabs, so test for it here.
+switch -glob -- [get-define host] {
+	*-*-darwin* {
+		if {[cctest -cflags {-gstabs}]} {
+			define cc-default-debug -gstabs
+		}
+	}
+}
+
 if {![cc-check-includes stdlib.h]} {
 	user-error "Compiler does not work. See config.log"
 }
-- 
1.7.4.4