maintainer-feedback requested: [Bug 232547] graphics/exiv2: improvements for GCC architectures

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Bugzilla Automation <bugzilla at FreeBSD.org> has asked freebsd-multimedia mailing
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Bug 232547: graphics/exiv2: improvements for GCC architectures
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=232547



--- Description ---
GCC architectures currently use GCC7 from ports to build many ports dependent
on exiv2, but GCC7 can't link againts libraries compiled with GCC4.2. Switch to
GCC7 to fix it.

Since ports GCC is not available on mips*, don't add USES=compiler:c++11-lang
globally, since it will break mips*.

powerpc64 compiles ok without -mminimal-toc, so remove that since it introduces
performance penalty.

Additionally, when building with GCC7, linking against libintl is necessary, so
add that for GCC architectures, besides mips*.

Tested on powerpc64 and amd64.

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