Tell BSD users to run gmake instead.

bnoordhuis · bnoordhuis · commit 09130147cfb5 · 2011-07-11T14:17:23.000+02:00
diff --git a/BSDmakefile b/BSDmakefile
@@ -0,0 +1,2 @@
+all:
+	@echo "I need GNU make. Please run \`gmake\` instead."

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+all:`
	`2`	+ @echo "I need GNU make. Please run \`gmake\` instead."