/usr/bin/cc -fno-strict-aliasing -fno-common -dynamic -arch x86_64 -arch i386 -g -Os -pipe -fno-common -fno-strict-aliasing -fwrapv -DENABLE_DTRACE -DMACOSX -DNDEBUG -Wall -Wstrict-prototypes -Wshorten-64-to-32 -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch x86_64 -arch i386 -pipe -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c libffi-src/ffi.c -o build/temp.macosx-10.10-intel-2.7/libffi-src/ffi.o -DPyObjC_STRICT_DEBUGGING -DMACOSX -DPyObjC_BUILD_RELEASE=1010 -DMACOSX -g -fexceptions -Wall -Wstrict-prototypes -Wmissing-prototypes -Wformat=2 -W -Wpointer-arith -Wmissing-declarations -Wnested-externs -W -Wno-import -DPyObjC_BUILD_RELEASE=1010 -DNO_OBJC2_RUNTIME -isysroot / -Ibuild/codegen/ -Ilibffi-src/include -Ilibffi-src/powerpc

In file included from libffi-src/ffi.c:25:

libffi-src/include/ffi_common.h:37:11: fatal error: 'string.h' file not found

#       include <string.h>

                ^

1 error generated.

error: command '/usr/bin/cc' failed with exit status 1

----------------------------------------
Cleaning up...
Command /Users/ao-osee/.virtualenvs/cura/bin/python -c "import setuptools, tokenize;__file__='/Users/ao-osee/.virtualenvs/cura/build/pyobjc-core/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /var/folders/8j/bj3whgy16yngy_lzgzd69fvw0000gn/T/pip-Z3PEUm-record/install-record.txt --single-version-externally-managed --compile --install-headers /Users/ao-osee/.virtualenvs/cura/include/site/python2.7 failed with error code 1 in /Users/ao-osee/.virtualenvs/cura/build/pyobjc-core
Storing debug log for failure in /Users/ao-osee/.pip/pip.log