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kbuild: uapi: use custom stub headers instead of libc ones

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Now that custom stub headers are provided for all libc headers used from
the UAPI headers, the dependency on the toolchain libc can be dropped.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Nicolas Schier <nsc@kernel.org>
Tested-by: Nicolas Schier <nsc@kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: https://patch.msgid.link/20260227-kbuild-uapi-libc-v1-7-c17de0d19776@weissschuh.net
Signed-off-by: Nicolas Schier <nsc@kernel.org>
This commit is contained in:
Thomas Weißschuh 2026-02-27 07:38:05 +01:00 committed by Nicolas Schier
parent aad94ba683
commit 579f103fb9
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GPG Key ID: 07520A7016261269
1 changed files with 2 additions and 3 deletions
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5
usr/include/Makefile
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@ -138,14 +138,13 @@ endif
always-y := $(patsubst $(obj)/%.h,%.hdrtest, $(shell find $(obj) -name '*.h' 2>/dev/null))
target-no-libc = $(filter-out $(uses-libc), $*.h)
target-can-compile = $(and $(filter-out $(no-header-test), $*.h), \
$(or $(CONFIG_CC_CAN_LINK), $(target-no-libc)))
target-can-compile = $(filter-out $(no-header-test), $*.h)
# Include the header twice to detect missing include guard.
quiet_cmd_hdrtest = HDRTEST $<
cmd_hdrtest = \
$(CC) $(c_flags) -fsyntax-only -Werror -x c /dev/null \
$(if $(target-no-libc), -nostdinc, -I $(srctree)/usr/dummy-include) \
-nostdinc $(if $(target-no-libc), , -I $(srctree)/usr/dummy-include) \
$(if $(target-can-compile), -include $< -include $<); \
$(PERL) $(src)/headers_check.pl $(obj) $<; \
touch $@