#**************************************************************************
#*
#*  X11-specific rules files, used to compile the X11 graphics driver
#*  when supported by the current platform
#*
#**************************************************************************

#########################################################################
#
# Try to detect an X11 setup.
#
# We simply try to detect a `X11R6/bin', `X11R5/bin' or `X11/bin' in
# the current path.
#
ifneq ($(findstring X11R6$(SEP)bin,$(PATH)),)
xversion := X11R6
endif

ifneq ($(findstring X11R5$(SEP)bin,$(PATH)),)
xversion := X11R5
endif

ifneq ($(findstring X11$(SEP)bin,$(PATH)),)
xversion := X11
endif

ifdef xversion
X11_PATH := $(subst ;, ,$(PATH)) $(subst :, ,$(PATH))
X11_PATH := $(filter %$(xversion)$(SEP)bin,$(X11_PATH))
X11_PATH := $(X11_PATH:%$(SEP)bin=%)
endif

##########################################################################
#
# Update some variables to compile the X11 graphics module. Note that
# X11 is available on Unix, or on OS/2. However, it only compiles with
# gcc on the latter platform, which is why it is safe to use the flags
# `-L' and `-l'
#
ifneq ($(X11_PATH),)

X11_INCLUDE    := $(X11_PATH)$(SEP)include
X11_LIB        := $(X11_PATH)$(SEP)lib

# the GRAPH_LINK variable is expanded each time an executable is linked against
# the graphics library..
#
GRAPH_LINK     += -L$(X11_LIB) -lX11

# add the X11 driver object file to the graphics library
#
GRAPH_OBJS += $(OBJ_)grx11.$O

GR_X11  := config$(SEP)x11
GR_X11_ := $(GR_X11)$(SEP)

DEVICES         += X11
DEVICE_INCLUDES += $(GR_X11)

# the rule used to compile the X11 driver
#
$(OBJ_)grx11.$O: $(GR_X11_)grx11.c $(GR_X11_)grx11.h
	$(CC) $(CFLAGS) $(GRAPH_INCLUDES:%=$I%) $I$(GR_X11) \
              $(X11_INCLUDE:%=$I%) $T$@ $<
endif