diff --git a/GNUmakefile b/GNUmakefile
new file mode 100644
index 000000000..4c175dbc5
--- /dev/null
+++ b/GNUmakefile
@@ -0,0 +1,8 @@
+# General tools
+
+SHELL=PATH='$(PATH)' /bin/sh
+
+# enable second expansion
+.SECONDEXPANSION:
+
+include Rules.mk
diff --git a/Makefile b/Makefile
index 4c175dbc5..8c6963e61 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,6 @@
-# General tools
+all:
+	@gmake $@
+.PHONY: all
 
-SHELL=PATH='$(PATH)' /bin/sh
-
-# enable second expansion
-.SECONDEXPANSION:
-
-include Rules.mk
+.DEFAULT:
+	@gmake $@
diff --git a/test/3nodetest/Makefile b/test/3nodetest/GNUmakefile
similarity index 100%
rename from test/3nodetest/Makefile
rename to test/3nodetest/GNUmakefile
diff --git a/test/dependencies/Makefile b/test/dependencies/GNUmakefile
similarity index 100%
rename from test/dependencies/Makefile
rename to test/dependencies/GNUmakefile
diff --git a/test/integration/Makefile b/test/integration/GNUmakefile
similarity index 100%
rename from test/integration/Makefile
rename to test/integration/GNUmakefile
diff --git a/test/sharness/Makefile b/test/sharness/GNUmakefile
similarity index 100%
rename from test/sharness/Makefile
rename to test/sharness/GNUmakefile