[ptxdist] [PATCH v2 5/5] libubootenv: Make yaml support optional

[Alexander Dahl via ptxdist <ptxdist@pengutronix.de>]

If just used as drop in replacement with the old configuration format,
libyaml dependency is not required.  You only need to enable it, if you
intend to use the new, extended configuration format.

Link: https://github.com/sbabic/libubootenv/blob/master/docs/fw_env_config.md#configuration-file-in-yaml
Signed-off-by: Alexander Dahl <ada@thorsis.com>
---

Notes:
    v2:
    - new patch, not in v1

 rules/libubootenv.in   | 8 +++++++-
 rules/libubootenv.make | 2 +-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/rules/libubootenv.in b/rules/libubootenv.in
index 317a440fc..3bee47481 100644
--- a/rules/libubootenv.in
+++ b/rules/libubootenv.in
@@ -3,7 +3,7 @@
 menuconfig LIBUBOOTENV
 	tristate
 	select HOST_CMAKE
-	select LIBYAML
+	select LIBYAML if LIBUBOOTENV_YAML_CONFIG
 	select ZLIB
 	prompt "libubootenv                   "
 	help
@@ -21,6 +21,12 @@ config LIBUBOOTENV_TOOLS
 	help
 	  Install fw_printenv and fw_setenv to target.
 
+config LIBUBOOTENV_YAML_CONFIG
+	bool
+	prompt "extended conf file format"
+	help
+	  Support the new, extended, yaml based configuration file format.
+
 comment "u-boot-tools is selected!"
 	depends on U_BOOT_TOOLS
 
diff --git a/rules/libubootenv.make b/rules/libubootenv.make
index d6753cd87..1ec86693a 100644
--- a/rules/libubootenv.make
+++ b/rules/libubootenv.make
@@ -35,7 +35,7 @@ LIBUBOOTENV_CONF_TOOL	:= cmake
 LIBUBOOTENV_CONF_OPT	:=  \
 	$(CROSS_CMAKE_USR) \
 	-DBUILD_DOC=OFF \
-	-DNO_YML_SUPPORT=OFF
+	-DNO_YML_SUPPORT=$(call ptx/ifdef, PTXCONF_LIBUBOOTENV_YAML_CONFIG, OFF, ON)
 
 # ----------------------------------------------------------------------------
 # Target-Install
-- 
2.39.5