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depends: Propagate well-known vars into depends

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For example, doing:

  make CC=clang CXX=clang++

Should now propagate these settings down to depends packages
This commit is contained in:
Carl Dong 2020-04-29 16:30:40 -04:00
parent fa3288cda1
commit 3d6603e340
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1 changed files with 9 additions and 0 deletions
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9
depends/hosts/default.mk
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@ -13,9 +13,18 @@ default_host_OTOOL = $(host_toolchain)otool
default_host_NM = $(host_toolchain)nm
define add_host_tool_func
ifneq ($(filter $(origin $1),undefined default),)
# Do not consider the well-known var $1 if it is undefined or is taking a value
# that is predefined by "make" (e.g. the make variable "CC" has a predefined
# value of "cc")
$(host_os)_$1?=$$(default_host_$1)
$(host_arch)_$(host_os)_$1?=$$($(host_os)_$1)
$(host_arch)_$(host_os)_$(release_type)_$1?=$$($(host_os)_$1)
else
$(host_os)_$1=$(or $($1),$($(host_os)_$1),$(default_host_$1))
$(host_arch)_$(host_os)_$1=$(or $($1),$($(host_arch)_$(host_os)_$1),$$($(host_os)_$1))
$(host_arch)_$(host_os)_$(release_type)_$1=$(or $($1),$($(host_arch)_$(host_os)_$(release_type)_$1),$$($(host_os)_$1))
endif
host_$1=$$($(host_arch)_$(host_os)_$1)
endef