From ddccd2f0e340dd7befc8c921ac1fc168af1b1333 Mon Sep 17 00:00:00 2001
From: mquinson <mquinson@48e7efb5-ca39-0410-a469-dd3cf9ba447f>
Date: Tue, 7 Aug 2007 01:11:36 +0000
Subject: [PATCH] Also detect mingw compiler as a gcc one, and also cleanup
 CXXFLAGS and GCJFLAGS from the cruft (-g -O2) that autoconf put in there

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/simgrid/simgrid/trunk@4013 48e7efb5-ca39-0410-a469-dd3cf9ba447f
---
 acmacro/compiler-flags.m4 | 30 ++++++++++++++----------------
 1 file changed, 14 insertions(+), 16 deletions(-)

diff --git a/acmacro/compiler-flags.m4 b/acmacro/compiler-flags.m4
index 2189861f07..b6dd1e9ef0 100644
--- a/acmacro/compiler-flags.m4
+++ b/acmacro/compiler-flags.m4
@@ -13,23 +13,21 @@ AC_DEFUN([SG_COMPILE_FLAGS],[
     AS_HELP_STRING([--disable-compile-optimizations], [use compiler optimizations (default=yes, unless if CFLAGS is explicitly set)]),
     enable_compile_optimizations=$enableval,enable_compile_optimizations=auto)
 
-  if test "x$cflags_set" != "xyes" ; then 
-    # if user didn't specify CFLAGS explicitely
-    
     # AC PROG CC tests whether -g is accepted. 
-    # Cool, but it also tries to set -O2. I don't want it with gcc
-    saveCFLAGS="$CFLAGS"
-    CFLAGS=
-    case " $saveCFLAGS " in
-    *-g*) CFLAGS="-g" ;; 
-    esac
-    case " $saveCFLAGS " in
-    *-O2*) test "x$CC" = xgcc || CFLAGS="$CFLAGS -O2" ;; 
+    # Cool, but it also tries to set -O2 and -g. 
+    # I don't want it with gcc, but -O3 and -g2, and optimization only when asked by user
+    case $CC in 
+      *gcc)
+      if test "$CFLAGS" = "-g -O2" ; then
+        CFLAGS="-g3"
+      fi
+      if test "$CXXFLAGS" = "-g -O2" ; then
+        CXXFLAGS="-g3"
+      fi
+      if test "$GCJFLAGS" = "-g -O2" ; then
+        CXXFLAGS="-g3"
+      fi;;
     esac
-    
-    # damn AC PROG CC, why did you set -O??
-    CFLAGS="-g"
-  fi
 
   if test "x$enable_compile_warnings" = "xyes" ; then
     AC_MSG_CHECKING(the warning flags for this compiler)
@@ -48,7 +46,7 @@ AC_DEFUN([SG_COMPILE_FLAGS],[
       if test "x$enable_compile_warnings" = "xyes"; then
         warnCFLAGS=`echo $warnCFLAGS  -Wmissing-prototypes -Wmissing-declarations \
         -Wpointer-arith -Wchar-subscripts -Wcomment -Wformat -Wwrite-strings \
-        -Wno-unused-function  \
+        -Wno-unused-function  -Wno-strict-aliasing  \
         -Werror \
 	| sed 's/ +/ /g'`
 	# -Wno-unused-variable  -Wno-unused-label
-- 
2.20.1