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From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH v2] kbuild: add dtbs target for building all dtbs of an ARCH
Date: Wed, 16 Sep 2020 17:19:51 +0200	[thread overview]
Message-ID: <20200916151951.29117-1-a.fatoum@pengutronix.de> (raw)

As described in the documentation, upstream device trees extended by
barebox should take care to cause compile errors, not runtime errors,
when the paths they extend disappear. This way, breakage can be easily
detected when synchronizing the dts/ directory and fixed right then.

Make this process easier by providing a dtbs target that builds all
device trees available in arch/$(SRCARCH)/dts/.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
v1 -> v2:
  - populate $(targets) with device trees to build, so make dtbs does
    only build dts files changed since the last make dtbs run (Sascha)
---
 Makefile | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/Makefile b/Makefile
index 906068036715..3bf5cbce32a4 100644
--- a/Makefile
+++ b/Makefile
@@ -998,6 +998,22 @@ include/generated/version.h: FORCE
 include/generated/utsrelease.h: include/config/kernel.release FORCE
 	$(call filechk,utsrelease.h)
 
+# ---------------------------------------------------------------------------
+# Devicetree files
+
+ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/dts/),)
+dtstree := arch/$(SRCARCH)/dts
+endif
+
+ifneq ($(dtstree),)
+
+PHONY += dtbs
+all_dtbs += $(patsubst $(srctree)/%.dts,$(objtree)/%.dtb,$(wildcard $(srctree)/$(dtstree)/*.dts))
+targets += $(all_dtbs)
+dtbs: $(all_dtbs)
+
+endif
+
 # ---------------------------------------------------------------------------
 # Modules
 
@@ -1173,6 +1189,10 @@ help:
 	@$(if $(archhelp),$(archhelp),\
 		echo '  No architecture specific help defined for $(SRCARCH)')
 	@echo  ''
+	@$(if $(dtstree), \
+		echo '  Devicetree:'; \
+		echo '    * dtbs             - Build device tree blobs for all boards'; \
+		echo '')
 	@$(if $(boards), \
 		$(foreach b, $(boards), \
 		printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
-- 
2.28.0


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             reply	other threads:[~2020-09-16 15:19 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-16 15:19 Ahmad Fatoum [this message]
2020-10-05  8:30 ` Ahmad Fatoum
2020-10-07  8:48 ` Sascha Hauer

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