Don't use ?:= for setting PREFIX.

This does not work with all versions of (gnu) make.

diff --git a/Makefile b/Makefile
index 76925a61c96b011da382e53b72ab3f8ac39f3b1b..1f125c6886fb3757b193b7ca1fb0be6026f83b91 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 # where to install
-PREFIX ?:= /usr/local
+PREFIX ?= /usr/local
 libdir := $(PREFIX)/lib
 includedir := $(PREFIX)/include
 bindir := $(PREFIX)/bin