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Makefile: evaluate CCACHE and HOST{CC, CXX} at time of use

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As we are going to move to per-package SDK, the location of CCACHE and
therefore the definitions of HOSTCC and HOSTCXX need to be evaluated
at the time of use and not at the time of assignment. Indeed, the
value of HOST_DIR changes from one package to the other.

Therefore, we need to change from := to =.

In addition, while doing A := $(something) $(A) is possible, doing A =
$(something) $(A) is not legal. So, instead of defining HOSTCC in
terms of the current HOSTCC variable, we re-use HOSTCC_NOCCACHE
instead.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Thomas Petazzoni 2018-11-23 15:58:06 +01:00 committed by Peter Korsgaard
parent 897f84f262
commit 11e8c900ff
1 changed files with 3 additions and 3 deletions
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6
Makefile
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@ -471,11 +471,11 @@ BR_PATH = "$(HOST_DIR)/bin:$(HOST_DIR)/sbin:$(PATH)"
TARGET_DIR_WARNING_FILE = $(BASE_TARGET_DIR)/THIS_IS_NOT_YOUR_ROOT_FILESYSTEM
ifeq ($(BR2_CCACHE),y)
CCACHE := $(HOST_DIR)/bin/ccache
CCACHE = $(HOST_DIR)/bin/ccache
BR_CACHE_DIR ?= $(call qstrip,$(BR2_CCACHE_DIR))
export BR_CACHE_DIR
HOSTCC := $(CCACHE) $(HOSTCC)
HOSTCXX := $(CCACHE) $(HOSTCXX)
HOSTCC = $(CCACHE) $(HOSTCC_NOCCACHE)
HOSTCXX = $(CCACHE) $(HOSTCXX_NOCCACHE)
else
export BR_NO_CCACHE
endif