I think this deserves a bump...
> Hi,
>
> It seems clang is almost unusuable on old macppc boxes such as my G3
> B&W, which doesn't have Altivec support.
>
> This compiles OK:
> int main() { return 0; }
>
> but this crashes:
> /* Same thing, but with a comment. */
> int main() { return 0; }
>
> with the following error:
> Stack dump:
> 0. Program arguments:
> /usr/local/bin/clang -cc1 -triple powerpc-unknown-openbsd4.9 -S
> -disable-free -disable-llvm-verifier -main-file-name test2.c
> -mrelocation-model static -mdisable-fp-elim -mconstructor-aliases
> -target-linker-version 2.15 -momit-leaf-frame-pointer -resource-dir
> /usr/local/bin/../lib/clang/2.9 -ferror-limit 19 -fmessage-length 0
> -fno-signed-char -fgnu-runtime -fdiagnostics-show-option -o
> /tmp/cc-hLpenZ.s -x c test2.c
> 1. <unknown> parser at unknown
> location clang: error: unable to execute command: Illegal instruction
> (core dumped) clang: error: clang frontend command failed due to
> signal 1 (use -v to see invocation)
>
> I see there this a patch in the port [1] which undef's __SSE2__ so I
> guess the same thing should be done for __ALTIVEC__. Unfortunately,
> it wasn't possible for me to test the patch, since it would take forever
> to compile on such an old box. But I guess the issue is here.
>
> I'd gladly test any new package built with this patch on my G3, if it
> helps.
>
> Tsomi.
>
> [1] patch-tools_clang_lib_Lex_Lexer_cpp
>
> Index: devel/llvm/patches/patch-tools_clang_lib_Lex_Lexer_cpp
> ===================================================================
> RCS file:
> /cvs/ports/devel/llvm/patches/patch-tools_clang_lib_Lex_Lexer_cpp,v
> retrieving revision 1.6
> diff -u -p -r1.6 patch-tools_clang_lib_Lex_Lexer_cpp
> --- devel/llvm/patches/patch-tools_clang_lib_Lex_Lexer_cpp 13 Jan 2011
> 00:15:50 -0000 1.6
> +++ devel/llvm/patches/patch-tools_clang_lib_Lex_Lexer_cpp 26 Jun 2011
> 12:41:36 -0000
> @@ -1,10 +1,11 @@
> $OpenBSD: patch-tools_clang_lib_Lex_Lexer_cpp,v 1.6 2011/01/13 00:15:50
> jeremy Exp $
> ---- tools/clang/lib/Lex/Lexer.cpp.orig Tue Aug 31 09:42:00 2010
> -+++ tools/clang/lib/Lex/Lexer.cpp Thu Jan 6 11:26:07 2011
> -@@ -1334,6 +1334,7 @@ static bool
> isEndOfBlockCommentWithEscapedNewLine(cons
> +--- tools/clang/lib/Lex/Lexer.cpp.orig Mon Feb 28 03:37:51 2011
> ++++ tools/clang/lib/Lex/Lexer.cpp Sun Jun 26 14:39:38 2011
> +@@ -1516,6 +1516,8 @@ static bool
> isEndOfBlockCommentWithEscapedNewLine(cons
> return true;
> }
>
> ++#undef __ALTIVEC__
> +#undef __SSE2__
> #ifdef __SSE2__
> #include <emmintrin.h>
>
