[U-Boot] [PATCH v3 13/20] fdt: Makefile: Build python libfdt library if needed

[Simon Glass]

This is needed by binman and dtoc, so if those are being used, check that
the library is present and complain if not.

This means that the fallback library (which uses fdtget) will not be used
anymore and swig will need to be installed to use binman / dtoc.

This affects any board which uses binman (currently sunxi and x86) or dtoc
(anything that uses CONFIG_SPL_OF_PLATDATA, currently some rockchip
boards).

Signed-off-by: Simon Glass <sjg at chromium.org>
---

Changes in v3: None
Changes in v2: None

 Makefile             | 16 ++++++++++++++--
 scripts/Makefile.spl | 17 +++++++++++++----
 2 files changed, 27 insertions(+), 6 deletions(-)

diff --git a/Makefile b/Makefile
index 1b7cab2121..89e0451a49 100644
--- a/Makefile
+++ b/Makefile
@@ -1116,7 +1116,7 @@ cmd_ldr = $(LD) $(LDFLAGS_$(@F)) \
 
 u-boot.rom: u-boot-x86-16bit.bin u-boot.bin \
 		$(if $(CONFIG_SPL_X86_16BIT_INIT),spl/u-boot-spl.bin) \
-		$(if $(CONFIG_HAVE_REFCODE),refcode.bin) FORCE
+		$(if $(CONFIG_HAVE_REFCODE),refcode.bin) checkbinman FORCE
 	$(call if_changed,binman)
 
 OBJCOPYFLAGS_u-boot-x86-16bit.bin := -O binary -j .start16 -j .resetvec
@@ -1125,7 +1125,8 @@ u-boot-x86-16bit.bin: u-boot FORCE
 endif
 
 ifneq ($(CONFIG_ARCH_SUNXI),)
-u-boot-sunxi-with-spl.bin: spl/sunxi-spl.bin u-boot.img u-boot.dtb FORCE
+u-boot-sunxi-with-spl.bin: spl/sunxi-spl.bin u-boot.img u-boot.dtb \
+		checkbinman FORCE
 	$(call if_changed,binman)
 endif
 
@@ -1354,6 +1355,17 @@ $(version_h): include/config/uboot.release FORCE
 $(timestamp_h): $(srctree)/Makefile FORCE
 	$(call filechk,timestamp.h)
 
+checkbinman: tools
+	@if ! ( echo 'import libfdt' | ( PYTHONPATH=tools python )); then \
+		echo '*** binman needs the Python libfdt library. Either '; \
+		echo '*** install it on your system, or try:'; \
+		echo '***'; \
+		echo '*** sudo apt-get install swig libpython-dev'; \
+		echo '***'; \
+		echo '*** to have U-Boot build its own version.'; \
+		false; \
+	fi
+
 # ---------------------------------------------------------------------------
 quiet_cmd_cpp_lds = LDS     $@
 cmd_cpp_lds = $(CPP) -Wp,-MD,$(depfile) $(cpp_flags) $(LDPPFLAGS) \
diff --git a/scripts/Makefile.spl b/scripts/Makefile.spl
index 135706f21d..ac3c2c7f13 100644
--- a/scripts/Makefile.spl
+++ b/scripts/Makefile.spl
@@ -257,14 +257,12 @@ PHONY += dts_dir
 dts_dir:
 	$(shell [ -d $(obj)/dts ] || mkdir -p $(obj)/dts)
 
-include/generated/dt-structs.h: $(obj)/$(SPL_BIN).dtb dts_dir dtoc
+include/generated/dt-structs.h: $(obj)/$(SPL_BIN).dtb dts_dir checkdtoc
 	$(call if_changed,dtoch)
 
-$(obj)/dts/dt-platdata.c: $(obj)/$(SPL_BIN).dtb dts_dir dtoc
+$(obj)/dts/dt-platdata.c: $(obj)/$(SPL_BIN).dtb dts_dir checkdtoc
 	$(call if_changed,dtocc)
 
-dtoc: #$(objtree)/tools/_libfdt.so
-
 ifdef CONFIG_SAMSUNG
 ifdef CONFIG_VAR_SIZE_SPL
 VAR_SIZE_PARAM = --vs
@@ -357,6 +355,17 @@ ifneq ($(cmd_files),)
   include $(cmd_files)
 endif
 
+checkdtoc: tools
+	@if ! ( echo 'import libfdt' | ( PYTHONPATH=tools python )); then \
+		echo '*** dtoc needs the Python libfdt library. Either '; \
+		echo '*** install it on your system, or try:'; \
+		echo '***'; \
+		echo '*** sudo apt-get install swig libpython-dev'; \
+		echo '***'; \
+		echo '*** to have U-Boot build its own version.'; \
+		false; \
+	fi
+
 PHONY += FORCE
 FORCE:
 
-- 
2.13.0.219.gdb65acc882-goog