779333 - libffi/configure should detect CC the same way as the top-level configure script

Status: RESOLVED DUPLICATE of bug 748138

(Firefox Build System :: General, defect)

Description

[Philipp von Weitershausen [:philikon]]

Without setting CC/CXX in your mozconfig, libffi/configure defaults to gcc instead of clang on OSX. This would mix gcc and clang in the compilation phase (which is kind of bad) and could also result in a possible configure failure (depending on your CFLAGS).

Comment 1

[Gregory Szorc [:gps]]

I was standing over philikon's shoulder when we found this. An easy way to trigger this is to adjust your CFLAGS/CXXFLAGS to contain -fcolor-diagnostics or a similar flag not provided by /usr/bin/g++-4.2. configure in the top-level and js directories works fine. libffi fails out with a "C compiler cannot create executables" because libffi is set to error on warnings and the unknown -fcolor-diagnostics argument triggers a warning.

Comment 2

[Rafael Ávila de Espíndola (:espindola) (not reading bugmail)]

Is this the same as 748138?

Comment 3

[Gregory Szorc [:gps]]

(In reply to Rafael Ávila de Espíndola (:espindola) from comment #2)
> Is this the same as 748138?

Sure looks like it.