[PATCH] tools/libxl: do not use `-c -E` compiler options together

[Roger Pau Monne <roger.pau@xxxxxxxxxx>]

It makes no sense to request for preprocessor only output and also request
object file generation.  Fix the _libxl.api-for-check target to only use
-E (preprocessor output).

Also Clang 20.0 reports an error if both options are used.

Reported-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Fixes: 2862bf5b6c81 ('libxl: enforce prohibitions of internal callers')
Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
---
 tools/libs/light/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/libs/light/Makefile b/tools/libs/light/Makefile
index 37e4d1670986..b690d921593d 100644
--- a/tools/libs/light/Makefile
+++ b/tools/libs/light/Makefile
@@ -195,7 +195,7 @@ libxl.api-ok: check-libxl-api-rules _libxl.api-for-check
        touch $@
 
 _libxl.api-for-check: $(XEN_INCLUDE)/libxl.h
-       $(CC) $(CPPFLAGS) $(CFLAGS) -c -E $< $(APPEND_CFLAGS) \
+       $(CC) $(CPPFLAGS) $(CFLAGS) -E $< $(APPEND_CFLAGS) \
                -DLIBXL_EXTERNAL_CALLERS_ONLY=LIBXL_EXTERNAL_CALLERS_ONLY \
                >$@.new
        mv -f $@.new $@
-- 
2.48.1