[project @ 2003-01-08 13:03:25 by simonmar]

Add -mno-omit-leaf-frame-pointer if gcc supports it.

MERGE TO STABLE

diff --git a/ghc/compiler/main/DriverFlags.hs b/ghc/compiler/main/DriverFlags.hs
index 328dac3..16c15c6 100644 (file)
--- a/ghc/compiler/main/DriverFlags.hs
+++ b/ghc/compiler/main/DriverFlags.hs
@@ -1,5 +1,5 @@
 -----------------------------------------------------------------------------
--- $Id: DriverFlags.hs,v 1.108 2002/12/17 13:50:29 simonmar Exp $
+-- $Id: DriverFlags.hs,v 1.109 2003/01/08 13:03:25 simonmar Exp $
 --
 -- Driver flags
 --
@@ -579,7 +579,15 @@ machdepCCOpts
             return ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
 --                    , if suffixMatch "mingw32" cTARGETPLATFORM then "-mno-cygwin" else "" 
                      ],
-                     [ "-fno-defer-pop", "-fomit-frame-pointer",
+                     [ "-fno-defer-pop",
+#ifdef HAVE_GCC_MNO_OMIT_LFPTR
+                       -- Some gccs are configured with
+                       -- -momit-leaf-frame-pointer on by default, and it
+                       -- apparently takes precedence over 
+                       -- -fomit-frame-pointer, so we disable it first here.
+                       "-mno-omit-leaf-frame-pointer",
+#endif
+                       "-fomit-frame-pointer",
                        -- we want -fno-builtin, because when gcc inlines
                        -- built-in functions like memcpy() it tends to
                        -- run out of registers, requiring -monly-n-regs