Allow Python packages to be dropped
When building in a portage chroot, we do not have the environment needed
to build pylibfdt. It is instead build as a separate package.
Provide a build option to tell U-Boot to skip this part of the build. We
still need it to use binman, etc. but don't need it to build its
dependencies.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
[s/build bytes/builds bytes in tools.rst]
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/Makefile b/Makefile
index 9be24c4..efbaf43 100644
--- a/Makefile
+++ b/Makefile
@@ -485,6 +485,15 @@
export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
--exclude CVS --exclude .pc --exclude .hg --exclude .git
+export PYTHON_ENABLE
+
+# This is y if U-Boot should not build any Python tools or libraries. Typically
+# you would need to set this if those tools/libraries (typically binman and
+# pylibfdt) cannot be built by your environment and are provided separately.
+ifeq ($(NO_PYTHON),)
+PYTHON_ENABLE=y
+endif
+
# ===========================================================================
# Rules shared between *config targets and build targets
diff --git a/doc/build/tools.rst b/doc/build/tools.rst
index ec017229..5bfa05b 100644
--- a/doc/build/tools.rst
+++ b/doc/build/tools.rst
@@ -45,3 +45,12 @@
$ make tools-only_defconfig
$ make tools-only
+
+
+Building without Python
+-----------------------
+
+The tools-only builds bytes pylibfdt by default. To disable this, use the
+NO_PYTHON variable::
+
+ NO_PYTHON=1 make tools-only_defconfig tools-only
diff --git a/scripts/dtc/Makefile b/scripts/dtc/Makefile
index 58d879d..faa72d9 100644
--- a/scripts/dtc/Makefile
+++ b/scripts/dtc/Makefile
@@ -19,4 +19,6 @@
$(obj)/dtc-lexer.lex.o: $(obj)/dtc-parser.tab.h
# Added for U-Boot
+ifeq ($(PYTHON_ENABLE),y)
subdir-$(CONFIG_PYLIBFDT) += pylibfdt
+endif