Don't double-declare GC_setspecific.
Set cflags necessary for compilation to work before testing whether compilation works.
Correctly generate and pass through compilation arguments for eglib and libgc.
Use malloc instead of alloca. Case 586085.
Don't pass mac sdk flags on not-darwin.
[linux] Populate more flags.
Quarantine iphone simulator options.
Pass arch with mac sdk options when building class libraries.
[android] Pass flags to libgc.
[android] Pass correct flags for x86 build.