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kbuild: uapi: use -fsyntax-only rather than -S

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The UAPI header tests are checking that the generated headers do not
have syntax errors. There's no need to run the rest of the compilation
pipeline after semantic analysis has run. Replace -S -o /dev/null with
-fsyntax-only.

Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Nick Desaulniers 2022-03-30 11:34:06 -07:00 committed by Masahiro Yamada
parent 3123109284
commit 9a22717b9b
1 changed files with 1 additions and 1 deletions
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usr/include/Makefile
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@ -92,7 +92,7 @@ always-y := $(patsubst $(obj)/%.h,%.hdrtest, $(shell find $(obj) -name '*.h' 2>/
# Include the header twice to detect missing include guard.
quiet_cmd_hdrtest = HDRTEST $<
cmd_hdrtest = \
$(CC) $(c_flags) -S -o /dev/null -x c /dev/null \
$(CC) $(c_flags) -fsyntax-only -x c /dev/null \
$(if $(filter-out $(no-header-test), $*.h), -include $< -include $<); \
$(PERL) $(srctree)/$(src)/headers_check.pl $(obj) $(SRCARCH) $<; \
touch $@