On 12/02/19 10:55 +0100, Jakub Jelinek wrote:
On Tue, Feb 12, 2019 at 09:49:23AM +0000, Jonathan Wakely wrote:
> On that basis, why does gcc-c++ install libgomp and libgfortran?
I think gcc-c++ doesn't require libgfortran, gcc-gfortran does.
Ah yes, sorry. I ran 'mock -r fedora-rawhide-x86_64 --install gcc-c++'
and saw it installing libgfortran, but actually it was already
installed (because of an earlier BuildRequires seen in the mock
chroot) and it was upgrading it because gcc-c++ was being upgraded.
The reason to have libgomp in the dependencies was that it is a
library that
isn't explicitly used on the command line, while to link against libatomic
you need to specify -latomic and so, like for any other random library you
need to make sure that the library is installed, one doesn't need to specify
-lgomp, simply linking with -fopenmp needs that library.
OK, that's logical.
>Though, I admit that the sanitizer libraries behave like libgomp, yet they
>aren't required by default (on the other side, those are development
>instrumentation libraries).
>
>> libatomic might be needed for some uses of std::atomic, but nothing in
>> ISO C++ requires OpenMP or Fortran.
>
> Jakub
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