comparison Makefile @ 374:ecad1ea0382a prerelease

Makefile improved checks. It does not fail after distclean

 
 # set the project to be compiled by calling: make all PROJECT=<project_name>
 
 # if the PROJECT variable is not set, throw an error and exit
 # otherwise, we could have unexpected data loss when calling clean without it
-ifndef PROJECT
-  ifndef EXAMPLE
-    $(warning PROJECT or EXAMPLE should be set in order to build)
+NO_PROJECT_TARGETS=distclean stop
+ifeq (,$(filter $(NO_PROJECT_TARGETS),$(MAKECMDGOALS)))
+  ifndef PROJECT
+    ifndef EXAMPLE
+      $(error PROJECT or EXAMPLE should be set when the target is not one of: `$(NO_PROJECT_TARGETS)`)
+    endif
   endif
 endif
 
-ifndef EXAMPLE
-  PROJECT_DIR := $(abspath projects/$(PROJECT))
-endif
-
+# if we are building an example, just copy it to the projects/ folder
+# and tehn treat it as a project
 ifdef EXAMPLE
   PROJECT?=exampleTempProject
   PROJECT_DIR?=$(abspath projects/$(PROJECT))
+  $(shell mkdir -p $(abspath projects)
   $(shell rm -rf $(PROJECT_DIR))
   $(shell cp -r examples/$(EXAMPLE) $(PROJECT_DIR))
-endif
+else
+  PROJECT_DIR := $(abspath projects/$(PROJECT))
+endif
+
+ifdef PROJECT
+  $(shell mkdir -p $(PROJECT_DIR)/build)
+endif
+
 OUTPUT_FILE?=$(PROJECT_DIR)/$(PROJECT)
 COMMAND_LINE_OPTIONS?=$(CL)
 RUN_COMMAND?=$(OUTPUT_FILE) $(COMMAND_LINE_OPTIONS)
 BELA_STARTUP_SCRIPT?=/root/BeagleRT_startup.sh
 BELA_AUDIO_THREAD_NAME?=bela-audio 
 SCREEN_NAME?=BeagleRT
 
-#TODO: run these lines only if the command is not syntax or 
-$(shell mkdir -p $(PROJECT_DIR)/build)
+
 RM := rm -rf
 STATIC_LIBS := ./libprussdrv.a ./libNE10.a
 LIBS := -lrt -lnative -lxenomai -lsndfile
 
 # refresh library cache and check if libpd is there