[PATCH v3 01/16] kbuild: userprogs: avoid duplicating of flags inherited from kernel

Thomas Weißschuh posted 16 patches 4 months ago
There is a newer version of this series
[PATCH v3 01/16] kbuild: userprogs: avoid duplicating of flags inherited from kernel
Posted by Thomas Weißschuh 4 months ago
The duplication makes maintenance harder. Changes need to be done in two
places and the lines will grow overly long.

Use an intermediary variable instead.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
 Makefile | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 35e6e5240c61a8a329011929fcd0352b881dccdc..c4293cf91e968ca8ee64452841fb266e24df63f6 100644
--- a/Makefile
+++ b/Makefile
@@ -1130,8 +1130,9 @@ LDFLAGS_vmlinux	+= --emit-relocs --discard-none
 endif
 
 # Align the bit size of userspace programs with the kernel
-KBUILD_USERCFLAGS  += $(filter -m32 -m64 --target=%, $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS))
-KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS))
+USERFLAGS_FROM_KERNEL := -m32 -m64 --target=%
+KBUILD_USERCFLAGS  += $(filter $(USERFLAGS_FROM_KERNEL), $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS))
+KBUILD_USERLDFLAGS += $(filter $(USERFLAGS_FROM_KERNEL), $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS))
 
 # userspace programs are linked via the compiler, use the correct linker
 ifeq ($(CONFIG_CC_IS_CLANG)$(CONFIG_LD_IS_LLD),yy)

-- 
2.49.0

Re: [PATCH v3 01/16] kbuild: userprogs: avoid duplicating of flags inherited from kernel
Posted by Nicolas Schier 4 months ago
On Wed, Jun 11, 2025 at 09:38:07AM +0200, Thomas Weißschuh wrote:
> The duplication makes maintenance harder. Changes need to be done in two
> places and the lines will grow overly long.
> 
> Use an intermediary variable instead.
> 
> Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
> ---
>  Makefile | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 

Reviewed-by: Nicolas Schier <n.schier@avm.de>