$OpenBSD: patch-CMakeLists_txt,v 1.2 2014/06/12 14:07:17 sthen Exp $
--- CMakeLists.txt.orig	Tue Apr 22 08:54:27 2014
+++ CMakeLists.txt	Thu Jun 12 14:46:50 2014
@@ -96,7 +96,10 @@ endif()
 # Install directories
 
 string(TOLOWER ${PROJECT_NAME} projectname)
-set(OPENJPEG_INSTALL_SUBDIR "${projectname}-${OPENJPEG_VERSION_MAJOR}.${OPENJPEG_VERSION_MINOR}")
+
+if(NOT OPENJPEG_INSTALL_SUBDIR)
+  set(OPENJPEG_INSTALL_SUBDIR "${projectname}-${OPENJPEG_VERSION_MAJOR}.${OPENJPEG_VERSION_MINOR}")
+endif()
 
 if(NOT OPENJPEG_INSTALL_BIN_DIR)
   set(OPENJPEG_INSTALL_BIN_DIR "bin")
