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tools/nolibc: add target to check header usability

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Each nolibc header should be valid for inclusion irrespective of any
special ordering requirements.

Add a new make target, based on the old kbuild "make header_check" target
to validate this requirement.

For now the check fails, but the following commits will fix the issues.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250424-nolibc-header-check-v1-1-011576b6ed6f@linutronix.de
This commit is contained in:
Thomas Weißschuh 2025-04-24 13:48:11 +02:00 • committed by Thomas Weißschuh
parent e90ce42e81
commit a6a054c8ad
1 changed files with 9 additions and 0 deletions
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9
tools/include/nolibc/Makefile
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@ -101,5 +101,14 @@ headers_standalone: headers
$(Q)$(MAKE) -C $(srctree) headers
$(Q)$(MAKE) -C $(srctree) headers_install INSTALL_HDR_PATH=$(OUTPUT)sysroot
# GCC uses "s390", clang "systemz"
CLANG_CROSS_FLAGS := $(subst --target=s390-linux,--target=systemz-linux,$(CLANG_CROSS_FLAGS))
headers_check: headers_standalone
for header in $(filter-out crt.h std.h,$(all_files)); do \
$(CC) $(CLANG_CROSS_FLAGS) -Wall -Werror -nostdinc -fsyntax-only -x c /dev/null \
-I$(or $(objtree),$(srctree))/usr/include -include $$header -include $$header || exit 1; \
done
clean:
$(call QUIET_CLEAN, nolibc) rm -rf "$(OUTPUT)sysroot"