Index: gmic-1.6.0.3/src/Makefile
===================================================================
--- gmic-1.6.0.3.orig/src/Makefile
+++ gmic-1.6.0.3/src/Makefile
@@ -142,10 +142,10 @@ OPENMP_LIBS = -lgomp
 # Flags to enable image display, using X11
 # (keep /usr/ dirname here since X11 is located in /usr/ on Mac too).
 # This requires the presence of the X11 include and library files.
 # (package 'libx11-dev' on Debian).
-X11_CFLAGS = -Dcimg_display=1 -Dcimg_appname=\\\"gmic\\\" -I/usr/X11R6/include #-Dcimg_use_xrandr
-X11_LIBS = -L/usr/X11R6/$(LIB) -lX11 -lpthread #-lXrandr
+X11_CFLAGS = -Dcimg_display=1 -Dcimg_appname=\\\"gmic\\\" -I/usr/X11R6/include -Dcimg_use_xrandr
+X11_LIBS = -L/usr/X11R6/$(LIB) -lX11 -lpthread -lXrandr
 
 # Flags to enable fast display, using XShm.
 # This requires the presence of the X11 extension include and library files.
 # (package 'libx11-dev' on Debian).
@@ -234,20 +234,20 @@ BOARD_LIBS = -lboard
 # Predefined sets of flags for different default configurations.
 #----------------------------------------------------------------
 
 # Unix : Standard build.
-STD_UNIX_CFLAGS = $(MANDATORY_CFLAGS) $(PARALLEL_CFLAGS) $(OPENMP_CFLAGS) $(X11_CFLAGS) $(PNG_CFLAGS) \
+STD_UNIX_CFLAGS = $(MANDATORY_CFLAGS) $(PARALLEL_CFLAGS) $(OPENMP_CFLAGS) $(X11_CFLAGS) $(XSHM_CFLAGS) $(PNG_CFLAGS) \
                   $(JPEG_CFLAGS) $(TIFF_CFLAGS) $(ZLIB_CFLAGS) \
-	  	  $(EXR_CFLAGS) $(FFTW_CFLAGS) $(OPENCV_CFLAGS) # $(XSHM_CFLAGS) $(MAGICK_CFLAGS)
-STD_UNIX_LIBS = $(MANDATORY_LIBS) $(PARALLEL_LIBS) $(OPENMP_LIBS) $(X11_LIBS) $(PNG_LIBS) \
+	  	  $(EXR_CFLAGS) $(FFTW_CFLAGS) # $(OPENCV_CFLAGS) $(MAGICK_CFLAGS)
+STD_UNIX_LIBS = $(MANDATORY_LIBS) $(PARALLEL_LIBS) $(OPENMP_LIBS) $(X11_LIBS) $(XSHM_LIBS) $(PNG_LIBS) \
 		   $(JPEG_LIBS) $(TIFF_LIBS) $(ZLIB_LIBS) \
-	           $(EXR_LIBS) $(FFTW_LIBS) $(OPENCV_LIBS) # $(XSHM_LIBS) # $(MAGICK_LIBS)
+	           $(EXR_LIBS) $(FFTW_LIBS) # $(OPENCV_LIBS) # $(MAGICK_LIBS)
 
 # Unix : Minimal build.
-MINIMAL_UNIX_CFLAGS = $(MANDATORY_CFLAGS) $(PARALLEL_CFLAGS) $(OPENMP_CFLAGS) $(DEBUG_CFLAGS) $(X11_CFLAGS) \
-	              ${TIFF_CFLAGS} ${PNG_CFLAGS} $(ZLIB_CFLAGS) $(FFTW_CFLAGS) $(CHECKIMAGE_CFLAGS) $(OPENCV_CFLAGS)
-MINIMAL_UNIX_LIBS = $(MANDATORY_LIBS) $(PARALLEL_LIBS) $(OPENMP_LIBS) $(X11_LIBS) \
-	               ${TIFF_LIBS} ${PNG_LIBS} $(ZLIB_LIBS) $(FFTW_LIBS) $(OPENCV_LIBS)
+MINIMAL_UNIX_CFLAGS = $(MANDATORY_CFLAGS) $(PARALLEL_CFLAGS) $(OPENMP_CFLAGS) $(DEBUG_CFLAGS) $(X11_CFLAGS) $(XSHM_CFLAGS) \
+	              ${TIFF_CFLAGS} ${PNG_CFLAGS} $(ZLIB_CFLAGS) $(FFTW_CFLAGS) $(CHECKIMAGE_CFLAGS) # $(OPENCV_CFLAGS)
+MINIMAL_UNIX_LIBS = $(MANDATORY_LIBS) $(PARALLEL_LIBS) $(OPENMP_LIBS) $(X11_LIBS) $(XSHM_LIBS) \
+	               ${TIFF_LIBS} ${PNG_LIBS} $(ZLIB_LIBS) $(FFTW_LIBS) # $(OPENCV_LIBS)
 
 # Unix : Static build.
 #STATIC_PATH = $(USR)/${LIB}/x86_64-linux-gnu
 STATIC_PATH=$(USR)/$(LIB)