RUN: lld -flavor darwinnew -v \
RUN:   -demangle \
RUN:   -dynamic \
RUN:   -no_deduplicate \
RUN:   -lto_library /lib/foo \
RUN:   -macosx_version_min 0 \
RUN:   -syslibroot /path/to/MacOSX.platform/Developer/SDKs/MacOSX.sdk
RUN: not lld -flavor darwinnew -v --not-an-ignored-argument 2>&1 | FileCheck %s
CHECK: error: unknown argument: --not-an-ignored-argument