1 files changed, 7 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index 6be584f536..82ab2f78f6 100644
--- a/Makefile
+++ b/Makefile
@@ -18,6 +18,13 @@
 MAKEFLAGS += --no-builtin-rules
 .SUFFIXES:
 
+
+# -----------------------------------------------------------------------------
+# Sanitize environment
+
+# See Trac #11530
+export GREP_OPTIONS :=
+
 ifneq "$(filter maintainer-clean distclean clean clean_% help,$(MAKECMDGOALS))" ""
 -include mk/config.mk
 else