www/libxul: fails to compile with CLANG and fails to install with GCC

[Brooks Davis]

On Wed, Sep 19, 2012 at 03:50:45PM +0200, O. Hartmann wrote:
> I already filed a PR (ports/171566) regarding the CLANG compilation
> issue, but since CLANG is a troublemaker for several ports, I also used
> USE_GCC=4.6 to compile the port www/libxul and this works - but fails
> then installing with
> 
> [...]
>   adding: hyphenation/hyph_hu.dic (deflated 62%)
> /usr/ports/www/libxul/work/mozilla-esr10/dist/bin/xpcshell: Undefined
> symbol "JSVAL_NULL"
> gmake[1]: *** [install] Error 1
> gmake[1]: Leaving directory
> `/usr/ports/www/libxul/work/mozilla-esr10/xulrunner/installer'
> gmake: *** [install] Error 2
> *** [gecko-pre-install] Error code 2
> 
> Stop in /usr/ports/www/libxul.
> *** [install] Error code 1

Hmm.  Sounds like a miscompile.  If you're up for an experiment, I'd be
interested in the results of applying the linked patch and building
with USE_GCC=4.2.

http://people.freebsd.org/~brooks/patches/really-use-gcc.diff

It turns out that USE_GCC incorrectly assumes that CC/CPP/CXX don't need
to be changed when the requested version of gcc is in the base system.

-- Brooks
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