Index: gmic-1.6.5.0/src/Makefile
===================================================================
--- gmic-1.6.5.0.orig/src/Makefile
+++ gmic-1.6.5.0/src/Makefile
@@ -140,10 +140,10 @@ 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).
@@ -236,10 +236,10 @@ BOARD_LIBS = -lboard
 #-------------------------------
 STD_CLI_CFLAGS = $(MANDATORY_CFLAGS) $(PNG_CFLAGS) $(JPEG_CFLAGS) $(TIFF_CFLAGS) $(CURL_CFLAGS) $(FFTW_CFLAGS)
 STD_CLI_LIBS = $(MANDATORY_LIBS) $(PNG_LIBS) $(JPEG_LIBS) $(TIFF_LIBS) $(CURL_LIBS) $(FFTW_LIBS)
 ifeq ($(OS),Unix) # Unix.
-STD_CLI_CFLAGS += $(PARALLEL_CFLAGS) $(OPENMP_CFLAGS) $(X11_CFLAGS) $(EXR_CFLAGS) $(OPENCV_CFLAGS) # $(XSHM_CFLAGS) $(MAGICK_CFLAGS)
-STD_CLI_LIBS += $(PARALLEL_LIBS) $(OPENMP_LIBS) $(X11_LIBS) $(EXR_LIBS) $(OPENCV_LIBS) # $(XSHM_LIBS) # $(MAGICK_LIBS)
+STD_CLI_CFLAGS += $(PARALLEL_CFLAGS) $(OPENMP_CFLAGS) $(X11_CFLAGS) $(XSHM_CFLAGS) $(EXR_CFLAGS) $(OPENCV_CFLAGS) # $(MAGICK_CFLAGS)
+STD_CLI_LIBS += $(PARALLEL_LIBS) $(OPENMP_LIBS) $(X11_LIBS) $(XSHM_LIBS) $(EXR_LIBS) $(OPENCV_LIBS) # $(MAGICK_LIBS)
 else
 ifeq ($(OS),Darwin) # MacOSX.
 STD_CLI_CFLAGS += $(X11_CFLAGS) $(EXR_CFLAGS)
 STD_CLI_LIBS += $(X11_LIBS) $(EXR_LIBS) $(OPT_LIBS)
@@ -266,10 +266,10 @@ STATIC_CLI_LIBS = $(PARALLEL_LIBS) \
 #--------------------------------
 STD_GIMP_CFLAGS = $(MANDATORY_CFLAGS) $(PNG_CFLAGS) $(CURL_CFLAGS) $(FFTW_CFLAGS) -Dcimg_use_rng
 STD_GIMP_LIBS = $(MANDATORY_LIBS) $(PNG_LIBS) $(CURL_LIBS) $(FFTW_LIBS)
 ifeq ($(OS),Unix) # Unix.
-STD_GIMP_CFLAGS += $(PARALLEL_CFLAGS) $(OPENMP_CFLAGS) $(X11_CFLAGS)
-STD_GIMP_LIBS += $(PARALLEL_LIBS) $(OPENMP_LIBS) $(X11_LIBS)
+STD_GIMP_CFLAGS += $(PARALLEL_CFLAGS) $(OPENMP_CFLAGS) $(X11_CFLAGS) $(XSHM_CFLAGS)
+STD_GIMP_LIBS += $(PARALLEL_LIBS) $(OPENMP_LIBS) $(X11_LIBS) $(XSHM_LIBS)
 else
 ifeq ($(OS),Darwin) # MaxOSX.
 STD_GIMP_CFLAGS += $(X11_CFLAGS)
 STD_GIMP_LIBS += $(X11_LIBS)