Bug 454449 - client.mk doesn't gracefully fail if it can't locate autoconf; v3; r=ted.mielczarek

client.mk

@@ -93,6 +93,10 @@ endif
 # MacOS X 10.4 sends "no autoconf*" errors to stdout, discard those via grep
 AUTOCONF ?= $(shell which autoconf-2.13 autoconf2.13 autoconf213 2>/dev/null | grep -v '^no autoconf' | head -1)
 
+ifeq (,$(strip $(AUTOCONF)))
+AUTOCONF=$(error Couldn't find autoconf 2.13)
+endif
+
 MKDIR := mkdir
 SH := /bin/sh
 ifndef MAKE