svn commit: r367883 - in head: Mk lang/gcc

[Bryan Drewery]

On 9/11/2014 6:28 PM, Adam Weinberger wrote:
> On 11 Sep, 2014, at 18:38, Bryan Drewery <bdrewery at FreeBSD.org> wrote:
> 
>> On 9/10/2014 4:32 PM, Gerald Pfeifer wrote:
>>> On Wed, 10 Sep 2014, Bryan Drewery wrote:
>>>> Thanks for writing up a summary of changes. Very useful. I learned 
>>>> about AddressSanitizer being supported.
>>>
>>> You are very welcome!  (I haven't tested AddressSanitizer myself, 
>>> but think I recall a positive report by a user.  If it does not 
>>> work properly we might look into lang/gcc49 or lang/gcc5.)
>>
>> Actually it fails to link. Both clang and gcc complain about missing
>> libasan symbols.
>>
>> I find no providers of libasan in any of the gcc, llvm or clang packages.
>>
>> It appears it is a submodule of both gcc and clang. So it likely just
>> need to be hooked up in the build for gcc.
>>
>> Simple test case:
>>
>> # echo 'int main() {return 0;}'|g++5 -Wall -fsanitize=address -o
>> /dev/null -x c -
>> /usr/local/bin/ld: cannot find -lasan
>> collect2: error: ld returned 1 exit status
> 
> From lang/gcc/work/gcc-4.8.3/libsanitizer/configure.tgt:
> case "${target}" in
>   x86_64-*-linux* | i?86-*-linux*)
>         if test x$ac_cv_sizeof_void_p = x8; then
>                 TSAN_SUPPORTED=yes
>         fi
>         ;;
>   powerpc*le-*-linux*)
>         UNSUPPORTED=1
>         ;;
>   powerpc*-*-linux*)
>         ;;
>   sparc*-*-linux*)
>         ;;
>   x86_64-*-darwin[1]* | i?86-*-darwin[1]*)
>         TSAN_SUPPORTED=no
>         ;;
>   *)
>         UNSUPPORTED=1
>         ;;
> esac
> 
> In configure output:
> checking for libsanitizer support… no
> 
> # Adam
> 
> 

It would be fantastic to get this working. It's been generating a lot of
$$$ lately and saving the world.

This seems to discuss it a bit and has a patch for testing (posted just
days ago):
https://code.google.com/p/address-sanitizer/issues/detail?id=303&colspec=ID%20Type%20Status%20Priority%20OpSys%20Owner%20Summary

-- 
Regards,
Bryan Drewery

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