[Bug 1041924] Review Request: fish - Friendly Interactive Shell

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https://bugzilla.redhat.com/show_bug.cgi?id=1041924



--- Comment #9 from Ralf Corsepius <rc040203@xxxxxxxxxx> ---
(In reply to Andy Lutomirski from comment #7)
> Re: the g++ call to link the executables: does it matter for linking?  In
> any case, I patched it.
Yes, it does. 

Linking will fail, when GCC requires one of the flags in RPM_OPT_FLAGS.

A classic such case is picking up the correct multilibs to link against,
because some cflags/cxxflags cause GCC to implicitly switch library-paths.

E.g. building a package for i386 on an x86_64 requires GCC to be passed -m32,
which would then cause GCC to implicitly link against i386-libraries instead of
x86_64-libraries. In Fedora, this issue currently is hidden, because GCCs'
default architectures (the architecture GCC uses without additional flags)
matches those of the corresponding Fedora release.

I.e. on Fedora-i386 GCC's default-arch is "i386", on Fedora-x86_64 it's x86_64.
However, this is just random/lucky coincidence. In the past we've had
situations where a Fedora's distribution arch did not match default arch of the
corresponding GCC, and had required special CFLAGS (IIRC, this did apply on the
sparc and the powerpc).

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