X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/d887c0c73cbfc16a1e51207041fd94399de70c29..b2920402b4bdbb0523dcb5d8f89dd1c1f548b28b:/Bootloaders/makefile

diff --git a/Bootloaders/makefile b/Bootloaders/makefile
index 0c183e73e..ba4f51259 100644
--- a/Bootloaders/makefile
+++ b/Bootloaders/makefile
@@ -22,8 +22,23 @@ ifeq ($(MAKELEVEL), 10)
    $(error EMERGENCY ABORT: INFINITE RECURSION DETECTED)
 endif
 
-all:
-	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) clean all;)
+# If building without a per-project object directory, we can't build in parallel
+ifeq ($(OBJDIR),)
+   .NOTPARALLEL:
 
-%:
-	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) $@;)
+   # Ensure projects are pre-cleaned if the target is the default or "all"
+   ifeq ($(MAKECMDGOALS),)
+      MAKECMDGOALS := clean all
+   endif
+   ifneq ($(findstring all, $(MAKECMDGOALS)),)
+      MAKECMDGOALS := clean $(MAKECMDGOALS)
+   endif
+endif
+
+%: $(PROJECT_DIRECTORIES)
+	@echo . > /dev/null
+
+$(PROJECT_DIRECTORIES):
+	@$(MAKE) -C $@ $(MAKECMDGOALS)
+    
+.PHONY: $(PROJECT_DIRECTORIES)