Workaround using new Clang with an old NDK.
We're using an old NDK and a new Clang. New Clangs default to
`-stdlib=libc++` for Android, but those libraries cannot be found by
default with an old NDK. Use an explicit `-stdlib=libstdc++` in the
cxx_mode_flags.
@@ -59,6 +59,7 @@ if config.asan_shadow_scale != '':
# transitive shared library dependency (via asan runtime).
if config.android:
config.target_cflags += " -pie -fuse-ld=gold -Wl,--enable-new-dtags"
+ config.cxx_mode_flags.append('-stdlib=libstdc++')
# Clear some environment variables that might affect Clang.
possibly_dangerous_env_vars = ['ASAN_OPTIONS', 'DFSAN_OPTIONS', 'LSAN_OPTIONS',
