[PATCH 1/2] kbuild: allow overriding mkimage

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

mkimage is not built as part of barebox and the barebox build for the
BeaglePlay assumes it's in PATH. To make integration in build systems
easier, let's allow specifying the location of the mkimage binary via
the MKIMAGE variable.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 Makefile        | 3 ++-
 images/Makefile | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 3de35d3a34cc..3487aba201b9 100644
--- a/Makefile
+++ b/Makefile
@@ -438,6 +438,7 @@ KALLSYMS	= scripts/kallsyms
 PERL		= perl
 PYTHON3		= python3
 CHECK		= sparse
+MKIMAGE		= mkimage
 BASH		= bash
 
 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
@@ -500,7 +501,7 @@ LDFLAGS_elf += $(LDFLAGS_common) --nmagic -s
 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL PYTHON3 UTS_MACHINE
 export LEX YACC
-export HOSTCXX CHECK CHECKFLAGS
+export HOSTCXX CHECK CHECKFLAGS MKIMAGE
 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS
 
diff --git a/images/Makefile b/images/Makefile
index 4e5cb693e40a..6daaee8b7c7e 100644
--- a/images/Makefile
+++ b/images/Makefile
@@ -117,7 +117,7 @@ $(obj)/%.s: $(obj)/% FORCE
 quiet_cmd_itb = FIT.ITS $@
 cmd_itb = $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) \
 	-D'$(subst -,_,$(*F))_dts=1' $(foreach f,$< $(2),-include '$(f)') /dev/null ; \
-	mkimage -f $(dtc-tmp) $@ -E \
+	$(MKIMAGE) -f $(dtc-tmp) $@ -E \
 	cat $(depfile).pre $(depfile).dtc > $(depfile)
 
 $(obj)/%.itb: $(obj)/%.its FORCE
-- 
2.39.5