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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
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