Checking for valid CONFIG value in Makefile

diff --git a/Makefile b/Makefile
index 3275706317b7424e7ed0db25d3a002ce6c5d7046..09b2adbc3403a3e707cf8e44336a5d4dde8b921e 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -63,22 +63,22 @@ ABCPULL = 1
 ifeq ($(CONFIG),clang)
 CXX = clang
 CXXFLAGS += -std=c++11 -Os
-endif
 
-ifeq ($(CONFIG),gcc)
+else ifeq ($(CONFIG),gcc)
 CXX = gcc
 CXXFLAGS += -std=gnu++0x -Os
-endif
 
-ifeq ($(CONFIG),gcc-4.6)
+else ifeq ($(CONFIG),gcc-4.6)
 CXX = gcc-4.6
 CXXFLAGS += -std=gnu++0x -Os
-endif
 
-ifeq ($(CONFIG),emcc)
+else ifeq ($(CONFIG),emcc)
 CXX = emcc
 CXXFLAGS += -std=c++11 -Os -Wno-warn-absolute-paths
 CXXFLAGS := $(filter-out -ggdb,$(CXXFLAGS))
+
+else ifneq ($(CONFIG),none)
+$(error Invalid CONFIG setting '$(CONFIG)'. Valid values: clang, gcc, gcc-4.6, emcc, none)
 endif
 
 ifeq ($(ENABLE_READLINE),1)