Building firefox with clang

[Mikhail T.]

Hello!

For whatever reasons, both firefox (28) and firefox-esr (24) compiled here using
GCC 4.9 kept crashing with SIGBUS -- possibly some sort of misunderstanding
between different binaries (firefox and dependencies) compiled with different
compilers. My system is a 9.2-STABLE/i386.

Unfortunately, I could not figure out, how to tell the port to use clang --
until I gave up and simply added the three lines at the bottom of
www/firefox/Makefile

    Index: Makefile
    ===================================================================
    --- Makefile    (revision 350024)
    +++ Makefile    (working copy)
    @@ -104,3 +104,7 @@
            @${CAT} ${PKGMESSAGE}
     
     .include <bsd.port.post.mk>
    +
    +CC=    clang
    +CXX=   clang++
    +CPP=   clang-cpp

The clang-built browser seems to work just fine -- it ought to be possible to
use it without resorting to the hacks, however. Yours,

    -mi