Build config, added foo_PATH vars, for more flexible reuse of paths

Backwards compatible with "old" local.conf

Makefile.conf

@@ -43,17 +43,31 @@ YML2_PROC=$(YML2_PATH)/yml2proc $(YML2_OPTS)
 YML2_OPTS=--encoding=utf8
 
 ######### Engine #########
-ENGINE_LIB=-L$(HOME)/lib
-ENGINE_INC=-I$(HOME)/include
+ENGINE_LIB_PATH=$(HOME)/lib
+ENGINE_INC_PATH=$(HOME)/include
 
 ######### libAdapter #########
-AD_LIB=-L$(HOME)/lib
-AD_INC=-I$(HOME)/include
+AD_LIB_PATH=$(HOME)/lib
+AD_INC_PATH=$(HOME)/include
 
 ######### Overrides #########
 -include $(HERE)/local.conf
 -include $(HERE)/src/local.conf
 
+# Add Prefixes to paths, if not already explicitly set in local.conf(s)
+ifndef ENGINE_LIB
+    ENGINE_LIB=-L$(ENGINE_LIB_PATH)
+endif
+ifndef ENGINE_INC
+    ENGINE_INC=-I$(ENGINE_INC_PATH)
+endif
+ifndef AD_LIB
+    AD_LIB=-L$(AD_LIB_PATH)
+endif
+ifndef AD_INC
+    AD_INC=-I$(AD_INC_PATH)
+endif
+
 ifdef BUILD_CONFIG
     include $(BUILD_CONFIG)
 endif

README.md

@@ -39,13 +39,15 @@ JAVA_HOME=/Library/Java/JavaVirtualMachines/openjdk8/Contents/Home
 
 YML2_PATH=$(HOME)/code/yml2
 
-ENGINE_INC=-I$(HOME)/code/engine/build/include
-ENGINE_LIB=-L$(HOME)/code/engine/build/lib
+ENGINE_INC_PATH=$(HOME)/code/engine/build/include
+ENGINE_LIB_PATH=$(HOME)/code/engine/build/lib
 
-AD_INC=-L$(HOME)/code/libad/build/include
-AD_LIB=-L$(HOME)/code/libad/build/lib
+AD_INC_PATH=$(HOME)/code/libad/build/include
+AD_LIB_PATH=$(HOME)/code/libad/build/lib
 ~~~
 
+The the foo_PATH variables will be turned into compiler directives (-I / -L), which can be directly set by just omitting "\_PATH" (e.g. ENGINE_INC). They  will take priority.
+
 Depending on what is already set in your environment, or can be found in your default include/library paths, setting any of these variables may be optional on your platform.
 
 Now, build the Adapter with