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kbuild: enable 'make AFLAGS=...' to add additional options to AS

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The variable AFLAGS is a wellknown variable and the usage by
kbuild may result in unexpected behaviour.
On top of that several people over time has asked for a way to
pass in additional flags to gcc.

This patch replace use of AFLAGS with KBUILD_AFLAGS all over
the tree.

Patch was tested on following architectures:
alpha, arm, i386, x86_64, mips, sparc, sparc64, ia64, m68k, s390

Signed-off-by: Sam Ravnborg <[email protected]>
This commit is contained in:
Sam Ravnborg 2007-10-15 21:59:31 +02:00
commit 222d394d30
28 changed files with 48 additions and 47 deletions
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5
Documentation/kbuild/makefiles.txt
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@ -424,6 +424,7 @@ more details, with real examples.
as-instr checks if the assembler reports a specific instruction
and then outputs either option1 or option2
C escapes are supported in the test instruction
Note: as-instr-option uses KBUILD_AFLAGS for $(AS) options
cc-option
cc-option is used to check if $(CC) supports a given option, and not
@ -819,14 +820,14 @@ When kbuild executes, the following steps are followed (roughly):
In this example, the binary $(obj)/image is a binary version of
vmlinux. The usage of $(call if_changed,xxx) will be described later.
AFLAGS $(AS) assembler flags
KBUILD_AFLAGS $(AS) assembler flags
Default value - see top level Makefile
Append or modify as required per architecture.
Example:
#arch/sparc64/Makefile
AFLAGS += -m64 -mcpu=ultrasparc
KBUILD_AFLAGS += -m64 -mcpu=ultrasparc
KBUILD_CFLAGS $(CC) compiler flags