import os import pipes import shlex import sys if not 'go' in config.root.llvm_bindings: config.unsupported = True def find_executable(executable, path=None): if path is None: path = os.environ['PATH'] paths = path.split(os.pathsep) base, ext = os.path.splitext(executable) if (sys.platform == 'win32' or os.name == 'os2') and (ext != '.exe'): executable = executable + '.exe' if not os.path.isfile(executable): for p in paths: f = os.path.join(p, executable) if os.path.isfile(f): return f return None else: return executable # Resolve certain symlinks in the first word of compiler. # # This is a Go-specific hack. cgo and other Go tools check $CC and $CXX for the # substring 'clang' to determine if the compiler is Clang. This won't work if # $CC is cc and cc is a symlink pointing to clang, as it is on Darwin. # # Go tools also have problems with ccache, so we disable it. def fixup_compiler_path(compiler): args = shlex.split(compiler) if args[0].endswith('ccache'): args = args[1:] path = find_executable(args[0]) try: if path.endswith('/cc') and os.readlink(path) == 'clang': args[0] = path[:len(path)-2] + 'clang' except (AttributeError, OSError): pass try: if path.endswith('/c++') and os.readlink(path) == 'clang++': args[0] = path[:len(path)-3] + 'clang++' except (AttributeError, OSError): pass return ' '.join([pipes.quote(arg) for arg in args]) config.environment['CC'] = fixup_compiler_path(config.host_cc) config.environment['CXX'] = fixup_compiler_path(config.host_cxx) config.environment['CGO_LDFLAGS'] = config.host_ldflags