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import subprocess
def getRoot(config):
if not config.parent:
return config
return getRoot(config.parent)
def is_gold_linker_available():
if not config.gold_executable:
return False
try:
ld_cmd = subprocess.Popen([config.gold_executable, '--help'], stdout = subprocess.PIPE)
ld_out = ld_cmd.stdout.read().decode()
ld_cmd.wait()
except:
return False
if not '-plugin' in ld_out:
return False
# config.clang is not guaranteed to be just the executable!
clang_cmd = subprocess.Popen(" ".join([config.clang, '-fuse-ld=gold', '-xc', '-']),
shell=True,
universal_newlines = True,
stdin = subprocess.PIPE,
stdout = subprocess.PIPE,
stderr = subprocess.PIPE)
clang_err = clang_cmd.communicate('int main() { return 0; }')[1]
if not 'invalid linker' in clang_err:
return True
return False
root = getRoot(config)
if root.host_os not in ['Linux'] or not is_gold_linker_available():
config.unsupported = True
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