examples: Handle additional example dependencies

Dependencies added via 'TARGETS' in add_example are 'in addition to' the
dependency provided by the example filename.

    * Small change to examples/CMakeLists.txt to handle additional
      dependencies
    * Prefix 'interfaces-' onto the interfaces examples

Signed-off-by: Noel Eck <noel.eck@intel.com>

examples/CMakeLists.txt

@@ -9,8 +9,8 @@
 #       <library>-[additional].c(xx)
 #       library: Name of UPM library required by example
 #       -additional: Any other string used to identify the example
-#   TARGETS - If TARGETS is set, ignore the <library>-[additional] syntax and
-#       use only the provided TARGETS as target name dependencies
+#   TARGETS - Additional dependency target/s required to BUILD/RUN this example.  If TARGETS is
+#       set, these are in addition to the dependency library provided by the example filename.
 #   SUFFIX - Provide a means to differentiate between C/C++ dependency targets and
 #       example names.  Leave empty for CXX examples. Use '-c' for c targets.
 #           SUFFIX  Example file  Dependency target  Example binary
@@ -59,12 +59,13 @@ function (add_example example_src)
     string (REPLACE "-" ";" split_name ${example_name})
     list (GET split_name 0 library_name)
 
-    # If TARGETS is not provided, parse dependency target name from example_src
-    if (NOT add_example_TARGETS)
-        # For sensorfoo, lib_target_names = sensorfoo-c
-        set (lib_target_names "${library_name}${add_example_SUFFIX}")
-    else ()
-        set (lib_target_names "${add_example_TARGETS}")
+    # Parse dependency target name from example_src filename (add on suffix)
+    # For sensorfoo, lib_target_names = sensorfoo-c
+    set (lib_target_names "${library_name}${add_example_SUFFIX}")
+
+    # If TARGETS is provided, add additional dependency targets
+    if (add_example_TARGETS)
+        list (APPEND lib_target_names "${add_example_TARGETS}")
     endif ()
 
     # Unfortunately, c++ and c library targets are not named the same. If

examples/c++/CMakeLists.txt

@@ -4,15 +4,15 @@ file (GLOB example_src_list RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} "*.cxx")
 # - Handle special cases here --------------------------------------------------
 
 # Test humidity interface for 2 sensor libraries
-add_example(humidity-sensor.cxx TARGETS si7005 bmp280)
+add_example(interfaces-humiditysensor.cxx TARGETS si7005 bmp280)
 # Test pressure interface for 2 sensor libraries
-add_example(pressure-sensor.cxx TARGETS bmp280 bmpx8x)
+add_example(interfaces-pressuresensor.cxx TARGETS bmp280 bmpx8x)
 # Test temperature interface for 3 sensor libraries
-add_example(temperature-sensor.cxx TARGETS bmp280 bmpx8x si7005)
+add_example(interfaces-temperaturesensor.cxx TARGETS bmp280 bmpx8x si7005)
 # Test light interface for 2 sensor libraries
-add_example(light-sensor.cxx TARGETS si1132 max44009)
+add_example(interfaces-lightsensor.cxx TARGETS si1132 max44009)
 # Test light controller interface for 3 sensor libraries
-add_example(light-controller.cxx TARGETS lp8860 ds1808lc hlg150h)
+add_example(interfaces-lightcontroller.cxx TARGETS lp8860 ds1808lc hlg150h)
 
 # - Create an executable for all other src files in this directory -------------
 foreach (_example_src ${example_src_list})