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[compiler-rt][test] Make glibc-* feature detection work on a musl distribution 

... where `ldd --version` has empty stdout and non-empty stderr.
This commit is contained in:
Fangrui Song 2020-12-27 21:50:47 -08:00
parent 0b56e3cdda
commit 99d650b369
1 changed files with 6 additions and 6 deletions
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8
compiler-rt/test/lit.common.cfg.py
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@ -380,15 +380,15 @@ else:
if config.host_os == 'Linux': if config.host_os == 'Linux':
# detect whether we are using glibc, and which version # detect whether we are using glibc, and which version
# NB: 'ldd' is just one of the tools commonly installed as part of glibc # NB: 'ldd' is just one of the tools commonly installed as part of glibc/musl
ldd_ver_cmd = subprocess.Popen(['ldd', '--version'], ldd_ver_cmd = subprocess.Popen(['ldd', '--version'],
stdout=subprocess.PIPE, stdout=subprocess.PIPE,
env={'LANG': 'C'}) env={'LANG': 'C'})
sout, _ = ldd_ver_cmd.communicate() sout, _ = ldd_ver_cmd.communicate()
ver_line = sout.splitlines()[0] ver_lines = sout.splitlines()
if not config.android and ver_line.startswith(b"ldd "): if not config.android and len(ver_lines) and ver_lines[0].startswith(b"ldd "):
from distutils.version import LooseVersion from distutils.version import LooseVersion
ver = LooseVersion(ver_line.split()[-1].decode()) ver = LooseVersion(ver_lines[0].split()[-1].decode())
for required in ["2.27", "2.30"]: for required in ["2.27", "2.30"]:
if ver >= LooseVersion(required): if ver >= LooseVersion(required):
config.available_features.add("glibc-" + required) config.available_features.add("glibc-" + required)