--- examples/Makefile.orig	2024-01-10 06:42:56 UTC
+++ examples/Makefile
@@ -89,7 +89,7 @@ SVERSION = $(VERSION1).$(VERSION2).$(VERSION3)
 VERSION3 = $(shell grep 'cimg_version\ ' ../CImg.h | tail -c2 | head -c1)
 SVERSION = $(VERSION1).$(VERSION2).$(VERSION3)
 
-X11PATH = /usr/X11R6
+X11PATH = $(LOCALBASE)
 
 EXE_PRE =
 EXE_EXT =
@@ -111,7 +111,7 @@ CXXVER = $(CXX)
 endif
 
 CXXVER = $(CXX)
-CFLAGS = -I.. -Wall -Wextra -Wfatal-errors -Werror=unknown-pragmas -Werror=unused-label
+CFLAGS = -I.. -Wall -Wextra $(CPPFLAGS)
 LIBS = -lm
 ifdef IS_GCC
 CXXVER = $(shell $(CXX) -v 2>&1 | tail -n 1)
@@ -151,7 +151,7 @@ VT100_CFLAGS = -Dcimg_use_vt100
 VT100_CFLAGS = -Dcimg_use_vt100
 
 # Flags to enable code optimization by the compiler.
-OPT_CFLAGS = -Ofast
+OPT_CFLAGS = # -Ofast - handled by the port CFLAGS
 ifdef IS_GCC
 # Add -mtune=generic for GCC if supported.
 NO_MTUNE_GENERIC = $(shell $(CXX) -mtune=generic -E - < /dev/null > /dev/null 2>&1; echo $$?)
@@ -176,9 +176,9 @@ OPENCV_DEFINE = -Dcimg_use_opencv
 
 # Flags to enable OpenCV support.
 OPENCV_DEFINE = -Dcimg_use_opencv
-OPENCV_INCDIR = $(shell pkg-config opencv --cflags || echo -I/usr/include/opencv) -I/usr/include/opencv -I/usr/include/opencv4
+OPENCV_INCDIR = $(shell pkg-config opencv4 --cflags || echo -I/usr/include/opencv) -I/usr/include/opencv -I/usr/include/opencv4
 OPENCV_CFLAGS = $(OPENCV_DEFINE) $(OPENCV_INCDIR)
-OPENCV_LIBS = $(shell pkg-config opencv --libs || echo -lopencv_core -lopencv_highgui)
+OPENCV_LIBS = $(shell pkg-config opencv4 --libs || echo -lopencv_core -lopencv_highgui)
 
 # Flags used to disable display capablities of CImg
 NODISPLAY_CFLAGS = -Dcimg_display=0
@@ -228,7 +228,7 @@ TIFF_CFLAGS = $(TIFF_DEFINE) $(TIFF_INCDIR)
 TIFF_DEFINE = -Dcimg_use_tiff
 TIFF_INCDIR =
 TIFF_CFLAGS = $(TIFF_DEFINE) $(TIFF_INCDIR)
-TIFF_LIBS = -ltiff
+TIFF_LIBS = -ltiff  -ltiffxx
 
 # Flags to enable native support for loading HEIF image files, using the libheif library.
 # ( https://github.com/strukturag/libheif )
@@ -247,16 +247,16 @@ OPENEXR_DEFINE = -Dcimg_use_openexr
 # Flags to enable native support for EXR image files, using the OpenEXR library.
 # ( http://www.openexr.com/ )
 OPENEXR_DEFINE = -Dcimg_use_openexr
-OPENEXR_INCDIR = -I/usr/include/OpenEXR
+OPENEXR_INCDIR = -I$(LOCALBASE)/include/OpenEXR
 OPENEXR_CFLAGS = $(OPENEXR_DEFINE) $(OPENEXR_INCDIR)
-OPENEXR_LIBS = -lIlmImf -lHalf
+OPENEXR_LIBS = -lOpenEXR -lImath
 
 # Flags to enable native support for various video files, using the FFMPEG library.
 # ( http://www.ffmpeg.org/ )
-FFMPEG_DEFINE = -Dcimg_use_ffmpeg -D__STDC_CONSTANT_MACROS
-FFMPEG_INCDIR = -I/usr/include/libavcodec -I/usr/include/libavformat -I/usr/include/libswscale -I/usr/include/ffmpeg
-FFMPEG_CFLAGS = $(FFMPEG_DEFINE) $(FFMPEG_INCDIR)
-FFMPEG_LIBS = -lavcodec -lavformat -lswscale
+#FFMPEG_DEFINE = -Dcimg_use_ffmpeg -D__STDC_CONSTANT_MACROS
+FFMPEG_INCDIR = -I$(LOCALBASE)/include/libavcodec -I$(LOCALBASE)/include/libavformat -I$(LOCALBASE)/include/libswscale -I$(LOCALBASE)/include/ffmpeg
+#FFMPEG_CFLAGS = $(FFMPEG_DEFINE) $(FFMPEG_INCDIR)
+#FFMPEG_LIBS = -lavcodec -lavformat -lswscale
 
 # Flags to enable native support for compressed .cimgz files, using the Zlib library.
 # ( http://www.zlib.net/ )
@@ -292,17 +292,17 @@ endif
 
 # Flags to enable the use of LAPACK routines for matrix computation
 # ( http://www.netlib.org/lapack/ )
-LAPACK_DEFINE = -Dcimg_use_lapack
+#LAPACK_DEFINE = -Dcimg_use_lapack
 LAPACK_INCDIR =
-LAPACK_CFLAGS = $(LAPACK_DEFINE) $(LAPACK_INCDIR)
-LAPACK_LIBS = -lblas -llapack
+#LAPACK_CFLAGS = $(LAPACK_DEFINE) $(LAPACK_INCDIR)
+#LAPACK_LIBS = -lblas -llapack
 
 # Flags to enable the use of the Board library
 # ( https://github.com/c-koi/libboard )
 BOARD_DEFINE = -Dcimg_use_board
-BOARD_INCDIR = -I/usr/include/board
-BOARD_CFLAGS = $(BOARD_DEFINE) $(BOARD_INCDIR)
-BOARD_LIBS = -lboard
+BOARD_INCDIR = -I$(LOCALBASE)/include/board
+#BOARD_CFLAGS = $(BOARD_DEFINE) $(BOARD_INCDIR)
+#BOARD_LIBS = -lboard
 
 # Flags to compile GIMP plug-ins.
 ifeq ($(MSYSTEM),MINGW32)
@@ -372,6 +372,7 @@ $(XSHM_LIBS)" \
 $(HEIF_LIBS) \
 $(LAPACK_LIBS) \
 $(XSHM_LIBS)" \
+$(PTHREAD_LIBS)" \
 all $(EXTRA_FILES)
 
 # Linux/BSD/Mac OSX targets, with X11 display.
@@ -452,6 +453,7 @@ $(OPT_CFLAGS) \
 	@$(MAKE) \
 "CONF_CFLAGS = \
 $(OPT_CFLAGS) \
+$(OPENMP_CFLAGS) \
 $(VT100_CFLAGS) \
 $(X11_CFLAGS) \
 $(XSHM_CFLAGS) \
@@ -465,8 +467,11 @@ $(MAGICK_CFLAGS) \
 $(CURL_CFLAGS) \
 $(OPENCV_CFLAGS) \
 $(MAGICK_CFLAGS) \
+$(LAPACK_CFLAGS) \
+$(BOARD_CFLAGS) \
 $(FFTW3_CFLAGS)" \
 "CONF_LIBS = \
+$(FREEBSD_LDFLAGS) \
 $(X11_LIBS) \
 $(XSHM_LIBS) \
 $(XRANDR_LIBS) \
@@ -479,6 +484,8 @@ $(MAGICK_LIBS) \
 $(CURL_LIBS) \
 $(OPENCV_LIBS) \
 $(MAGICK_LIBS) \
+$(LAPACK_LIBS) \
+$(BOARD_LIBS) \
 $(FFTW3_LIBS)" \
 "STRIP_EXE=true" \
 all $(EXTRA_FILES)