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libbpf: don't define CC and AR 

We are already including tools/scripts/Makefile.include which correctly
handles CROSS_COMPILE, no need to define our own vars.

See related commit 7ed1c1901f ("tools: fix cross-compile var clobbering")
for more details.

Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Stanislav Fomichev 2019-01-15 13:13:46 -08:00 committed by Daniel Borkmann
parent ae5220c672
commit eeedd3527d
1 changed files with 1 additions and 16 deletions
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17
tools/lib/bpf/Makefile
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@ -14,21 +14,6 @@ srctree := $(patsubst %/,%,$(dir $(srctree)))
#$(info Determined 'srctree' to be $(srctree))
endif
# Makefiles suck: This macro sets a default value of $(2) for the
# variable named by $(1), unless the variable has been set by
# environment or command line. This is necessary for CC and AR
# because make sets default values, so the simpler ?= approach
# won't work as expected.
define allow-override
$(if $(or $(findstring environment,$(origin $(1))),\
$(findstring command line,$(origin $(1)))),,\
$(eval $(1) = $(2)))
endef
# Allow setting CC and AR, or setting CROSS_COMPILE as a prefix.
$(call allow-override,CC,$(CROSS_COMPILE)gcc)
$(call allow-override,AR,$(CROSS_COMPILE)ar)
INSTALL = install
# Use DESTDIR for installing into a different root directory.
@ -54,7 +39,7 @@ man_dir_SQ = '$(subst ','\'',$(man_dir))'
export man_dir man_dir_SQ INSTALL
export DESTDIR DESTDIR_SQ
include ../../scripts/Makefile.include
include $(srctree)/tools/scripts/Makefile.include
# copy a bit from Linux kbuild