Re: [Help-gsl] GSL won't pass tests if I specify both -march=[any of core2 sandybridge ivybridge haswell] and -O2

[Patrick Alken]

On 08/18/2014 03:11 PM, Hong Xu wrote:
> Hi everyone,
>
> I have founded a very interesting problem: if I compile the gsl library
> with the CFLAGS of '-O2 -march=x86-64' or '-march=core2' (or one of
> sandybridge ivybridge haswell), all tests can pass. However, if I
> compile with CFLAGS='-O2 -march=[any of core2 sandybridge ivybridge
> haswell]', the tests won't pass. The file specfunc/testsuite.log is
> pasted in this link: http://pastebin.com/hcNhHz3b
>
> This would limit the usage of the advantage of newer instructions, and
> potentially there may be a bug. Would anyone look into this?
>
> Thanks!
> Hong
Could this be a gcc problem? A quick google search shows some gcc 
versions have bugs with these architectures