Make sure the build system honors C_INCLUDE_PATH and LIBRARY_PATH when looking for headers and libraries. --- Python-2.7.10/setup.py 2015-10-07 18:33:18.125153186 +0200 +++ Python-2.7.10/setup.py 2015-10-07 18:33:47.497347552 +0200 @@ -526,6 +526,14 @@ class PyBuildExt(build_ext): inc_dirs += ['/system/include', '/atheos/autolnk/include'] inc_dirs += os.getenv('C_INCLUDE_PATH', '').split(os.pathsep) + # Always honor these variables. + if not cross_compiling: + lib_dirs += os.getenv('LIBRARY_PATH', '').split(os.pathsep) + inc_dirs += os.getenv('C_INCLUDE_PATH', '').split(os.pathsep) + else: + lib_dirs = os.getenv('CROSS_LIBRARY_PATH', '').split(os.pathsep) + inc_dirs = os.getenv('CROSS_CPATH', '').split(os.pathsep) + # OSF/1 and Unixware have some stuff in /usr/ccs/lib (like -ldb) if host_platform in ['osf1', 'unixware7', 'openunix8']: lib_dirs += ['/usr/ccs/lib']