Makefile: add a default rule with help text

Signed-off-by: Anders Roxell <anders.roxell@linaro.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index 6c6c31e..34b1acd 100644
--- a/Makefile
+++ b/Makefile
@@ -23,6 +23,19 @@ PROGRAM_LIST = \
 	       l2fwd \
 	       simple_timer
 
+default:
+	@echo "Make targets:"
+	@echo "all     build examples"
+	@echo "clean   remove derived files"
+	@echo ""
+	@echo "to build against a local odp installation set"
+	@echo "PKG_CONFIG_PATH=<local-odp-install-dir>/lib/pkgconfig"
+	@echo "set other ODPLIB_NAME for other implementations."
+	@echo "default: odp-linux"
+	@echo ""
+	@echo "make all"
+	@echo "make all ODPLIB_NAME=odp-dpdk"
+
 all: $(PROGRAM_LIST)
 
 clean: