u-boot/scripts/Makefile
Simon Glass 93b1965322 Makefile: Only build dtc if needed
At present U-Boot always builds dtc if CONFIG_OF_CONTROL is defined, even
when DTC is provided. The built dtc is not actually used, so this is a
waste of time.

Update the Makefile logic to build dtc only if one is not provided to the
build with the DTC variable. Add documentation to explain this.

This saves about 3.5 seconds of elapsed time on a clean build of
sandbox_spl for me.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-10-19 11:23:07 -04:00

12 lines
353 B
Makefile

# SPDX-License-Identifier: GPL-2.0
###
# scripts contains sources for various helper programs used throughout
# the kernel for the build process.
# ---------------------------------------------------------------------------
hostprogs-$(CONFIG_BUILD_BIN2C) += bin2c
always := $(hostprogs-y)
# Let clean descend into subdirs
subdir- += basic kconfig