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kbuild: allow cc-ifversion to have the argument for false condition 

The macro "try-run" can have an argument for each of true and false
cases.  Having an argument for the false case of cc-ifversion (and
ld-ifversion) would be useful too.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
This commit is contained in:
Masahiro Yamada 2014-12-25 14:31:27 +09:00 committed by Michal Marek
parent 3df8094727
commit 6dcb4e5edf
2 changed files with 5 additions and 4 deletions
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5
Documentation/kbuild/makefiles.txt
View File

@ -531,8 +531,9 @@ more details, with real examples.
than or equal to gcc 3.0.
cc-ifversion
cc-ifversion tests the version of $(CC) and equals last argument if
version expression is true.
cc-ifversion tests the version of $(CC) and equals the fourth parameter
if version expression is true, or the fifth (if given) if the version
expression is false.
Example:
#fs/reiserfs/Makefile

4
scripts/Kbuild.include
View File

@ -137,7 +137,7 @@ cc-fullversion = $(shell $(CONFIG_SHELL) \
# cc-ifversion
# Usage: EXTRA_CFLAGS += $(call cc-ifversion, -lt, 0402, -O1)
cc-ifversion = $(shell [ $(cc-version) $(1) $(2) ] && echo $(3))
cc-ifversion = $(shell [ $(cc-version) $(1) $(2) ] && echo $(3) || echo $(4))
# cc-ldoption
# Usage: ldflags += $(call cc-ldoption, -Wl$(comma)--hash-style=both)
@ -160,7 +160,7 @@ ld-version = $(shell $(LD) --version | $(srctree)/scripts/ld-version.sh)
# ld-ifversion
# Usage: $(call ld-ifversion, -ge, 22252, y)
ld-ifversion = $(shell [ $(ld-version) $(1) $(2) ] && echo $(3))
ld-ifversion = $(shell [ $(ld-version) $(1) $(2) ] && echo $(3) || echo $(4))
######