Do not treat warnings as errors during corefx build in docker. (#23014)

* Do not treat warnings as errors during corefx build in docker.

* Add a comment.

diff --git a/tests/scripts/run-corefx-tests.py b/tests/scripts/run-corefx-tests.py
index 2dac80a..21ca3c2 100644 (file)
--- a/tests/scripts/run-corefx-tests.py
+++ b/tests/scripts/run-corefx-tests.py
@@ -300,6 +300,10 @@ def main(args):
         # clang3.9, which is currently the default used by the native build.
         build_args += ' /p:BuildNativeClang=--clang5.0'
 
+    if not Is_windows and (arch == 'arm' or arch == 'arm64'):
+        # It is needed under docker where LC_ALL is not configured.
+        build_args += ' --warnAsError false'
+
     command = ' '.join(('build.cmd' if Is_windows else './build.sh', build_args))
     log(command)
     returncode = 0 if testing else os.system(command)