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-rw-r--r--Makefile2
1 files changed, 2 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index 00a3533..1e20af8 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,5 @@
+.error : This Makefile needs GNU make
+
 CFLAGS+=-g -O2 -Wall -Wno-switch -Wextra -fstack-protector-strong -D_FORTIFY_SOURCE=2
 LDLIBS=-lrt
 ifdef OPENBSD