Add -fforce-omit-frame-pointer (illumos#50)

omniosorg · Jun 2, 2023 · 257828f · 257828f
1 parent 7d6780d
commit 257828f
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Showing 2 changed files with 9 additions and 2 deletions.
diff --git a/gcc/common.opt b/gcc/common.opt
@@ -2230,6 +2230,10 @@ fomit-frame-pointer
 Common Var(flag_omit_frame_pointer) Optimization
 When possible do not generate stack frames.
 
+fforce-omit-frame-pointer
+Common Var(flag_force_omit_frame_pointer) Optimization
+When possible, do not generate stack frames. Hinders debugging with mdb and dtrace.
+
 fopenmp-target-simd-clone
 Common Alias(fopenmp-target-simd-clone=,any,none)
 

diff --git a/gcc/config/i386/i386-options.cc b/gcc/config/i386/i386-options.cc
@@ -2973,8 +2973,11 @@ ix86_option_override_internal (bool main_args_p,
    * questionable benefit anyway, even on i386.
    */
 
-  flag_omit_frame_pointer = 0;
-  opts->x_flag_omit_frame_pointer = 0;
+  if (flag_force_omit_frame_pointer == 0)
+    {
+      flag_omit_frame_pointer = 0;
+      opts->x_flag_omit_frame_pointer = 0;
+    }
 
   /* Save the initial options in case the user does function specific
      options.  */