X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/8f8f3478917401f3d286dafd73902e9d80b527d2..deb6fce7bc7c897242eccd02bf9da5e5191efb58:/Projects/makefile

diff --git a/Projects/makefile b/Projects/makefile
index 50ce7ad6d..e169689bf 100644
--- a/Projects/makefile
+++ b/Projects/makefile
@@ -13,10 +13,19 @@
 # custom LUFA library build options are reflected in the compiled
 # code.
 
-PROJECT_DIRECTORIES = $(shell ls -d *)
+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) $@;)