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Index: share/man/man5/make.conf.5
===================================================================
--- share/man/man5/make.conf.5
+++ share/man/man5/make.conf.5
@@ -24,7 +24,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd March 29, 2016
+.Dd February 23, 2017
.Dt MAKE.CONF 5
.Os
.Sh NAME
@@ -176,6 +176,11 @@
.Dq Li +=
instead of
.Dq Li = .
+.It Va DTC
+.Pq Vt str
+Select the compiler for DTS (Device Tree Syntax) file.
+.Va DTC
+is initially set to the value of dtc
.It Va INSTALL
.Pq Vt str
the default install command.
Index: sys/conf/dtb.mk
===================================================================
--- sys/conf/dtb.mk
+++ sys/conf/dtb.mk
@@ -4,6 +4,8 @@
#
# +++ variables +++
#
+# DTC The Device Tree Compiler to use
+#
# DTS List of the dts files to build and install.
#
# DTBDIR Base path for dtb modules [/boot/dtb]
@@ -31,6 +33,8 @@
# do this after bsd.own.mk.
.include "kern.opts.mk"
+DTC?= dtc
+
# Search for kernel source tree in standard places.
.for _dir in ${.CURDIR}/../.. ${.CURDIR}/../../.. /sys /usr/src/sys
.if !defined(SYSDIR) && exists(${_dir}/kern/)
@@ -50,6 +54,7 @@
all: ${DTB}
.if defined(DTS)
+.export DTC
.for _dts in ${DTS}
${_dts:R:S/$/.dtb/}: ${_dts} ${OP_META}
@echo Generating ${.TARGET} from ${_dts}
Index: sys/tools/fdt/make_dtb.sh
===================================================================
--- sys/tools/fdt/make_dtb.sh
+++ sys/tools/fdt/make_dtb.sh
@@ -16,9 +16,11 @@
MACHINE=$(uname -m)
fi
+: ${DTC:=dtc}
+
for d in ${dts}; do
dtb=${dtb_path}/`basename $d .dts`.dtb
echo "converting $d -> $dtb"
cpp -P -x assembler-with-cpp -I $S/gnu/dts/include -I $S/boot/fdt/dts/${MACHINE} -I $S/gnu/dts/${MACHINE} -include $d /dev/null |
- dtc -@ -O dtb -o $dtb -b 0 -p 1024 -i $S/boot/fdt/dts/${MACHINE} -i $S/gnu/dts/${MACHINE}
+ ${DTC} -@ -O dtb -o $dtb -b 0 -p 1024 -i $S/boot/fdt/dts/${MACHINE} -i $S/gnu/dts/${MACHINE}
done

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