[Chicken-hackers] [PATCH] Remove -no-cpp-precomp flag for OS X

[Peter Bex]

Hi all,

This was reported off-list: on OS X, we pass the -no-cpp-precomp option
to the C compiler to enforce GCC's own preprocessor instead of Apple's
own preprocessor (which was probably massively broken or incompatible).
This was added to CHICKEN somewhere in 2003.

This option has been deprecated by Apple (but is accepted and silently
ignored since XCode 1.1), and reportedly this causes breakage using
(non-Apple) Macports GCC on OS X 10.6.8 (64-bit, SnowLeopard).
This is gcc (MacPorts gcc47 4.7.3_3) 4.7.3

Here's a reference from the Mozilla project discussing this same problem:
https://bugzilla.mozilla.org/show_bug.cgi?id=409224

Considering this option stopped doing anything at all so long ago, I think
we're safe to remove this as well.  The attached patch does that.
If people decide to use an old OS X release (which isn't supported by
Apple anymore), they could still override C_COMPILER_OPTIONS.
I'd appreciate if any OS X users could report whether everything keeps
working.

Thanks to Jason E. Aten for reporting this bug.

Cheers,
Peter
-- 
http://www.more-magic.net

0001-Remove-obsolete-no-cpp-precomp-flag-for-OS-X-build-t.patch
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