Changing compiler to gcc not works

[formath]

In my macOS, I have set export CC=/usr/local/bin/gcc-6 and export CXX=/usr/local/bin/g++-6. Then I built tensorflow from source using sh tensorflow/contrib/makefile/build_all_ios.sh. But I saw it also compile using clang. So, how to change compiler? @martinwicke

[martinwicke]

@petewarden knows more about the makefile.

[facaiy]

Hi, @formath . I prefer to using clang by default, since we seems not the only one who gets stuck in gcc on Mac, see #336, #75, #12266...

[formath]

@facaiy Yes. Running build_all_ios.sh using default clang works.
@petewarden Please also have a look of how to set compiler to gcc.
Thanks all.