[PATCH 2/7] pylibfdt: Allow building to be disabled

[Simon Glass <sjg-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>]

Some build systems want to build python libraries separately from the
rest of the build.

Add a NO_PYTHON option to enable this.

Signed-off-by: Simon Glass <sjg-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
---

 Makefile | 1 +
 README   | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/Makefile b/Makefile
index e6d8251..5cf4aee 100644
--- a/Makefile
+++ b/Makefile
@@ -120,6 +120,7 @@ SCRIPTS = dtdiff
 # We need both Python and swig to build pylibfdt.
 .PHONY: maybe_pylibfdt
 maybe_pylibfdt: FORCE
+	if [ -n "${NO_PYTHON}" ]; then exit; fi; \
 	if $(PKG_CONFIG) --cflags python >/dev/null 2>&1; then \
 		if which swig >/dev/null 2>&1; then \
 			can_build=yes; \
diff --git a/README b/README
index 96d8486..d2323fd 100644
--- a/README
+++ b/README
@@ -50,6 +50,12 @@ If you add new features, please check code coverage:
     # Open 'htmlcov/index.html' in your browser
 
 
+To disable building the python library, even if swig and Python are available,
+use:
+
+    make NO_PYTHON=1
+
+
 More work remains to support all of libfdt, including access to numeric
 values.
 
-- 
2.12.1.578.ge9c3154ca4-goog