um: Fix passing '-n' to linker for stub_exe

When building stub_exe with clang, there is an error because '-n' is not
a recognized flag by the clang driver (which is being used to invoke the
linker):

  clang: error: unknown argument: '-n'

'-n' should be passed along to the linker, as it is the short flag for
'--nmagic', so prefix it with '-Wl,'.

Fixes: 32e8eaf263d9 ("um: use execveat to create userspace MMs")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Link: https://patch.msgid.link/20241016-uml-fix-stub_exe-clang-v1-1-3d6381dc5a78@kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/arch/um/kernel/skas/Makefile b/arch/um/kernel/skas/Makefile
index fbb61968055f44ac8a963d4c7d250e7c6bbbb321..f93db893b8236cf805edd01b41501d51dd8f0a35 100644 (file)
--- a/arch/um/kernel/skas/Makefile
+++ b/arch/um/kernel/skas/Makefile
@@ -27,7 +27,7 @@ quiet_cmd_stub_exe = STUB_EXE $@
                           $(KBUILD_CFLAGS) $(STUB_EXE_LDFLAGS) \
                           $(filter %.o,$^)
 
-STUB_EXE_LDFLAGS = -n -static
+STUB_EXE_LDFLAGS = -Wl,-n -static
 
 targets += stub_exe.dbg stub_exe $(stub_exe_objs-y)