X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/8f8f3478917401f3d286dafd73902e9d80b527d2..6655815b32fc26f15e83bf12d14a6684f70e2d31:/Demos/Device/ClassDriver/makefile

diff --git a/Demos/Device/ClassDriver/makefile b/Demos/Device/ClassDriver/makefile
index cfa776a72..0e1dfae05 100644
--- a/Demos/Device/ClassDriver/makefile
+++ b/Demos/Device/ClassDriver/makefile
@@ -15,8 +15,17 @@
 
 PROJECT_DIRECTORIES = $(shell ls -d */)
 
+# This makefile is potentially infinitely recursive if something really bad
+# happens when determining the set of project directories - hard-abort if
+# more than 10 levels deep to avoid angry emails.
+ifeq ($(MAKELEVEL), 10)
+   $(error EMERGENCY ABORT: INFINITE RECURSION DETECTED)
+endif
+
 all:
+ifeq ($(OBJDIR),)
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) clean all;)
+endif
 
 %:
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) $@;)