Add emergency aborts to the recursive makefiles to prevent system failures due to...

[pub/USBasp.git] / Demos / DualRole / ClassDriver / makefile

diff --git a/Demos/DualRole/ClassDriver/makefile b/Demos/DualRole/ClassDriver/makefile
index 0655249..ecc49ec 100644 (file)
--- a/Demos/DualRole/ClassDriver/makefile
+++ b/Demos/DualRole/ClassDriver/makefile
@@ -15,10 +15,16 @@
 
 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)
+   $(error EMERGENCY ABORT: INFINITE RECURSION DETECTED)
+endif
+
 all:
        @$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) clean all;)
 
 %:
        @$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) $@;)
 
-