--- apps/tiff2geotiff/Makefile.orig	2013-08-24 03:06:51.000000000 +0800
+++ apps/tiff2geotiff/Makefile	2026-06-06 11:56:44.000000000 +0800
@@ -8,4 +8,6 @@
 
 LIBRARIES = tiff geotiff proj
 
+MAKEFILE_INCLUDE_DIRS += -I@@MP_PREFIX@@/lib/proj9/include
+
 include ${TOP}/make/config/base.mk