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kbuild: introduce cc-cross-prefix

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cc-cross-prefix is useful for the architecture that like
to provide a default CROSS_COMPILE value,
but may have several to select between.

Sample usage:

ifneq ($(SUBARCH),$(ARCH))
        ifeq ($(CROSS_COMPILE),)
               CROSS_COMPILE := $(call cc-cross-prefix, m68k-linux-gnu- m68k-linux-)
        endif
endif

Actual usage by the different archs will taken care of later.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
Sam Ravnborg 2007-10-19 21:46:01 +02:00
parent 50a8ec31c3
commit 910b40468a
2 changed files with 33 additions and 0 deletions
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11
scripts/Kbuild.include
View file

@ -56,6 +56,17 @@ endef
# gcc support functions
# See documentation in Documentation/kbuild/makefiles.txt
# cc-cross-prefix
# Usage: CROSS_COMPILE := $(call cc-cross-prefix, m68k-linux-gnu- m68k-linux-)
# Return first prefix where a prefix$(CC) is found in PATH.
# If no $(CC) found in PATH with listed prefixes return nothing
cc-cross-prefix = \
$(word 1, $(foreach c,$(1), \
$(shell set -e; \
if (which $(strip $(c))$(CC)) > /dev/null 2>&1 ; then \
echo $(c); \
fi)))
# output directory for tests below
TMPOUT := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/)