| Original patch from gentoo: gentoo/src/patchsets/gcc/4.3.1/gentoo/00_all_gcc-trampolinewarn.patch |
| This trivial patch causes gcc to emit a warning whenever |
| it generates a trampoline. These are otherwise hard to |
| locate. It is rigged to default ON - to have it default |
| to OFF remove the text 'Init(1)' from the common.opt |
| patch, leaving just 'Common Var(warn_trampolines)'. |
| Kevin F. Quinn <kevquinn@gentoo.org> 17 Jan 2006 |
| |
| diff -durN gcc-4.3.1.orig/gcc/builtins.c gcc-4.3.1/gcc/builtins.c |
| --- gcc-4.3.1.orig/gcc/builtins.c 2008-04-23 00:36:27.000000000 +0200 |
| +++ gcc-4.3.1/gcc/builtins.c 2008-06-10 14:56:54.000000000 +0200 |
| @@ -5662,6 +5662,9 @@ |
| trampolines_created = 1; |
| INITIALIZE_TRAMPOLINE (r_tramp, r_func, r_chain); |
| |
| + if (warn_trampolines) |
| + warning (OPT_Wtrampolines, "generating trampoline in object (requires executable stack)"); |
| + |
| return const0_rtx; |
| } |
| |
| diff -durN gcc-4.3.1.orig/gcc/common.opt gcc-4.3.1/gcc/common.opt |
| --- gcc-4.3.1.orig/gcc/common.opt 2008-01-22 15:11:44.000000000 +0100 |
| +++ gcc-4.3.1/gcc/common.opt 2008-06-10 14:56:54.000000000 +0200 |
| @@ -182,6 +182,10 @@ |
| Common Var(warn_system_headers) Warning |
| Do not suppress warnings from system headers |
| |
| +Wtrampolines |
| +Common Var(warn_trampolines) Init(1) |
| +Warn whenever a trampoline is generated |
| + |
| Wuninitialized |
| Common Var(warn_uninitialized) Warning |
| Warn about uninitialized automatic variables |
