cmake: extensions: add target_sources_if_dt_node()
This is like target_sources_ifdef(), except it works if a devicetree
node exists.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
diff --git a/cmake/extensions.cmake b/cmake/extensions.cmake
index b4b977f..fcde962 100644
--- a/cmake/extensions.cmake
+++ b/cmake/extensions.cmake
@@ -21,6 +21,7 @@
# 3.5. File system management
# 4. Devicetree extensions
# 4.1 dt_*
+# 4.2. *_if_dt_node
# 5. Zephyr linker functions
# 5.1. zephyr_linker*
@@ -3118,6 +3119,36 @@
endif()
endfunction()
+# 4.2. *_if_dt_node
+#
+# This section is similar to the extensions named *_ifdef, except
+# actions are performed if the devicetree contains some node.
+# *_if_dt_node functions may be added as needed, or if they are likely
+# to be useful for user applications.
+
+# Add item(s) to a target's SOURCES list if a devicetree node exists.
+#
+# Example usage:
+#
+# # If the devicetree alias "led0" refers to a node, this
+# # adds "blink_led.c" to the sources list for the "app" target.
+# target_sources_if_dt_node("led0" app PRIVATE blink_led.c)
+#
+# # If the devicetree path "/soc/serial@4000" is a node, this
+# # adds "uart.c" to the sources list for the "lib" target,
+# target_sources_if_dt_node("/soc/serial@4000" lib PRIVATE uart.c)
+#
+# <path> : Path to devicetree node to check
+# <target> : Build system target whose sources to add to
+# <scope> : Scope to add items to
+# <item> : Item (or items) to add to the target
+function(target_sources_if_dt_node path target scope item)
+ dt_node_exists(check PATH "${path}")
+ if(${check})
+ target_sources(${target} ${scope} ${item} ${ARGN})
+ endif()
+endfunction()
+
########################################################
# 5. Zephyr linker function
########################################################
