diff -rup gdal-2.1.0-orig/GDALmake.opt.in gdal-2.1.0/GDALmake.opt.in
--- gdal-2.1.0-orig/GDALmake.opt.in	2016-04-25 20:35:57.000000000 +0300
+++ gdal-2.1.0/GDALmake.opt.in	2016-05-10 05:25:25.988438174 +0300
@@ -68,7 +68,7 @@ INST_DOCS	=	@exec_prefix@/doc
 INST_MAN	=	@mandir@
 INST_HTML	=	$(HOME)/www/gdal
 
-CPPFLAGS	= @CPPFLAGS@ -I$(GDAL_ROOT)/port @EXTRA_INCLUDES@ -DGDAL_COMPILATION
+CPPFLAGS	= @CPPFLAGS@ -I$(GDAL_ROOT)/port -I$(GDAL_ROOT)/gcore @EXTRA_INCLUDES@ -DGDAL_COMPILATION
 CFLAGS		= @CFLAGS@ @C_WFLAGS@ $(USER_DEFS)
 CXXFLAGS	= @CXXFLAGS@ @CXX_WFLAGS@ $(USER_DEFS)
 CFLAGS_NOFTRAPV          = @CFLAGS_NOFTRAPV@ @C_WFLAGS@ $(USER_DEFS)