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kbuild: introduce ld-option

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ld-option is used to check if $(LD) supports a specific option.

Based on patch from Andi Kleen.

Cc: Andi Kleen <[email protected]>
Signed-off-by: Sam Ravnborg <[email protected]>
First use is to check if option -X is supported (upcoming patch).
Theis is ne
This commit is contained in:
Sam Ravnborg 2009-09-19 10:31:45 +02:00
commit 691ef3e7fd
2 changed files with 21 additions and 1 deletions
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14
Documentation/kbuild/makefiles.txt
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@ -18,6 +18,7 @@ This document describes the Linux kernel Makefiles.
--- 3.9 Dependency tracking
--- 3.10 Special Rules
--- 3.11 $(CC) support functions
--- 3.12 $(LD) support functions
=== 4 Host Program support
--- 4.1 Simple Host Program
@ -570,6 +571,19 @@ more details, with real examples.
endif
endif
--- 3.12 $(LD) support functions
ld-option
ld-option is used to check if $(LD) supports the supplied option.
ld-option takes two options as arguments.
The second argument is an optional option that can be used if the
first option is not supported by $(LD).
Example:
#Makefile
LDFLAGS_vmlinux += $(call really-ld-option, -X)
=== 4 Host Program support
Kbuild supports building executables on the host for use during the