From f1b60f78e0d51bc2ae2da61d1926e39056fa6a8f Mon Sep 17 00:00:00 2001
From: William Lallemand <wlallemand@haproxy.com>
Date: Thu, 13 Dec 2018 14:02:25 +0100
Subject: [PATCH] BUILD: Makefile: Implements the help target

Use the header of the Makefile to output the help target.
---
 Makefile | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Makefile b/Makefile
index 587bc0486..4e909e36f 100644
--- a/Makefile
+++ b/Makefile
@@ -966,6 +966,9 @@ LIB_EBTREE = $(EBTREE_DIR)/libebtree.a
 INCLUDES = $(wildcard include/*/*.h ebtree/*.h)
 DEP = $(INCLUDES) .build_opts
 
+help:
+	$(Q)sed -ne "/^[^#]*$$/q;s/^#\(.*\)/\1/p" Makefile
+
 # Used only to force a rebuild if some build options change
 .build_opts: $(shell rm -f .build_opts.new; echo \'$(TARGET) $(BUILD_OPTIONS) $(VERBOSE_CFLAGS)\' > .build_opts.new; if cmp -s .build_opts .build_opts.new; then rm -f .build_opts.new; else mv -f .build_opts.new .build_opts; fi)