http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59018
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Kostya Serebryany from comment #1)
> At least one of these patches does not build with clang:
>
> /home/kcc/llvm/projects/compiler-rt/lib/sanitizer_common/sanitizer_linux.cc:
> 807:21: error: ignored asm label 'r8' on automatic variable [-Werror]
> void *r8 __asm__ ("r8") = newtls;
> ^
> /home/kcc/llvm/projects/compiler-rt/lib/sanitizer_common/sanitizer_linux.cc:
> 808:21: error: ignored asm label 'r10' on automatic variable [-Werror]
> int *r10 __asm__ ("r10") = child_tidptr;
> ^
>
> is this some kind of gcc-specific syntax?
> (forgive my ignorance here)
Can you try
register void *r8 __asm__ ("r8") = newtls;
register int *r10 __asm__ ("r10") = child_tidptr;
as suggested by Jakub?
> Two general questions:
>
> 1. Before doing the merge I test the patch like this:
> rm -rf */{*/,}libsanitizer && make -j 50 && make -C gcc check-g{cc,++}
> RUNTESTFLAGS='--target_board=unix\{-m32,-m64\} asan.exp'
>
> What should I add to this line to also test x32?
I am using:
RUNTESTFLAGS='--target_board=unix\{-mx32,-m32,-m64\} asan.exp'
But you need to enable x32 first on your OS, which requires
1. x32 enabled kernel, Linux kernel >= 3.4.0.
2. x32 glibc.
>
> 2. Is there any chance to test x32 off the clang tree, so that we keep the
> upstream tree x32-clean all the time?
There was x32 port of llvm/clang last year. But only parts
of the x32 patches have been merged with llvm.
