[U-Boot] [PATCH v2 32/55] Only build the libfdt python module if 'swig' is available

[Simon Glass]

When swig is not available, we can still build correctly. So make this
optional. Add a comment about how to enable this build.

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

Changes in v2: None

 tools/Makefile | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/Makefile b/tools/Makefile
index a813217..0300e38 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -107,7 +107,10 @@ mkimage-objs   := $(dumpimage-mkimage-objs) mkimage.o
 fit_info-objs   := $(dumpimage-mkimage-objs) fit_info.o
 fit_check_sign-objs   := $(dumpimage-mkimage-objs) fit_check_sign.o
 
-hostprogs-$(CONFIG_SPL_OF_PLATDATA) += _libfdt.so
+# Build a libfdt Python module if swig is available
+# Use 'sudo apt-get install swig libpython-dev' to enable this
+hostprogs-$(CONFIG_SPL_OF_PLATDATA) += \
+	$(if $(shell which swig),_libfdt.so)
 _libfdt.so-sharedobjs += $(LIBFDT_OBJS)
 libfdt:
 
-- 
2.8.0.rc3.226.g39d4020