kbuild: uapi: split out command conditions into variables

The condition logic will become a bit more complicated.

Split them out into dedicated variables so they stay readable.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Link: https://patch.msgid.link/20251223-uapi-nostdinc-v1-4-d91545d794f7@linutronix.de
Signed-off-by: Nathan Chancellor <nathan@kernel.org>

diff --git a/usr/include/Makefile b/usr/include/Makefile
index fd29c11c35cbdce11a67f3f62cb239d18ec85c61..fa01bcda21f5207dd01c74de77f53e48c165aac6 100644 (file)
--- a/usr/include/Makefile
+++ b/usr/include/Makefile
@@ -150,12 +150,15 @@ 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 = $(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 $(filter-out $(uses-libc), $*.h), -nostdinc) \
-                       $(if $(filter-out $(no-header-test), $*.h), -include $< -include $<); \
+                       $(if $(target-no-libc), -nostdinc) \
+                       $(if $(target-can-compile), -include $< -include $<); \
                $(PERL) $(src)/headers_check.pl $(obj) $<; \
                touch $@