kbuild: Allow arch Makefiles to override {cpp,ld,c}flags

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commit 61754c1875 upstream.

Since commit a1c48bb1 (Makefile: Fix unrecognized cross-compiler command
line options), the arch Makefile is included earlier by the main
Makefile, preventing the arc architecture to set its -O3 compiler
option. Since there might be more use cases for an arch Makefile to
fine-tune the options, add support for ARCH_CPPFLAGS, ARCH_AFLAGS and
ARCH_CFLAGS variables that are appended to the respective kbuild
variables. The user still has the final say via the KCPPFLAGS, KAFLAGS
and KCFLAGS variables.

Reported-by: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Michal Marek 2015-07-01 17:19:30 +02:00 • committed by Greg Kroah-Hartman

parent a783168dab

commit 32469b1200

2 changed files with 13 additions and 4 deletions

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8

Documentation/kbuild/makefiles.txt

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9

Makefile

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