Xcode 9 build failed.clang: error: unknown argument: '-fno-math-builtin'

[seanxiaoxiang]

When I run the project with Xcode9. It say "clang: error: unknown argument: '-fno-math-builtin'"
This is the screen shot

[apollovy]

Go to build phases / compile sources, find packtab.c, remove -fno-math-builtin flag from it. Now it builds!