Introduce the per-project build cache.

Demo_ABB/build-script.sh

@@ -13,6 +13,9 @@
 #    C_INCLUDE_PATH=/usr/include/xenomai/analogy/:${C_INCLUDE_PATH}
 #    unset USE_POHIC   
 
+mkdir -p .cache
+export PROJECT_CACHE=$(pwd)/.cache
+
 CWD=$(pwd)
 
 if [ -t 1 ] ; then

Demo_ACN/build-script.sh

@@ -13,6 +13,9 @@
 #    C_INCLUDE_PATH=/usr/include/xenomai/analogy/:${C_INCLUDE_PATH}
 #    unset USE_POHIC   
 
+mkdir -p .cache
+export PROJECT_CACHE=$(pwd)/.cache
+
 CWD=$(pwd)
 
 if [ -t 1 ] ; then