#
# Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
#
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# This file is responsible for extracting the x11 native struct offsets to
# the xawt Java library. The tool needs to be run on the os/arch that
# will host the final jvm, thus the tool cannot be used when cross compiling.

# To enable cross compiling, the two versions of the generated offset file,
# sizes.32 and sizes.64 are committed into the source code repository.
# These are the ones used.

# However when not cross compiling, the offset generator tool is built and
# run, to verify that it still generates the same sizes.32 and sizes.64.

GENSRC_X11WRAPPERS :=
# Put temporary c-code and executable to calculate offsets here.
# Also put verification offset file here as well.
GENSRC_X11WRAPPERS_TMP := $(JDK_OUTPUTDIR)/gensrc_x11wrappers
# Put the generated Java classes used to interface X11 from awt here.
GENSRC_X11WRAPPERS_DST := $(JDK_OUTPUTDIR)/gensrc/sun/awt/X11

# The pre-calculated offset file are stored here:
GENSRC_SIZER_DIR := $(JDK_TOPDIR)/src/solaris/classes/sun/awt/X11/generator

# Normal case is to generate only according to target bits
GENSRC_X11_VERSION := $(OPENJDK_TARGET_CPU_BITS)
ifeq ($(OPENJDK_TARGET_CPU_BITS), 64)
  ifneq ($(OPENJDK_TARGET_OS), linux)
  # On all 64-bit systems except Linux, generate both 32 and 64 bit versions
  GENSRC_X11_VERSION := 32 64
  endif
else
  ifeq ($(OPENJDK_TARGET_OS), solaris)
  # As a special case, solaris 32-bit also generates the 64-bit version
  GENSRC_X11_VERSION := 32 64
  endif
endif

GENSRC_X11_SIZES_USED := $(addprefix $(GENSRC_X11WRAPPERS_TMP)/sizes.,$(GENSRC_X11_VERSION))

# Copy only the sizes.* files that are actually needed. WrapperGenerator picks up any it finds from the 
# file prefix it is given so those not needed need to be hidden.
$(GENSRC_X11WRAPPERS_TMP)/sizes.%: $(GENSRC_SIZER_DIR)/sizes.%
	$(MKDIR) -p $(@D)
	$(RM) '$@'
	$(SORT) $< > $@

# Run the tool on the offset files copied from the source repository to generate several Java classes 
# used in awt.
$(JDK_OUTPUTDIR)/gensrc/_the.generated.x11 : $(GENSRC_X11_SIZES_USED) $(BUILD_TOOLS)
	$(MKDIR) -p $(GENSRC_X11WRAPPERS_DST)
	$(TOOL_WRAPPERGENERATOR) $(GENSRC_X11WRAPPERS_DST) $(GENSRC_SIZER_DIR)/xlibtypes.txt "gen" $(GENSRC_X11WRAPPERS_TMP)/sizes
	$(TOUCH) $@

GENSRC_X11WRAPPERS += $(JDK_OUTPUTDIR)/gensrc/_the.generated.x11

ifneq ($(COMPILE_TYPE),cross)
    # This is not a cross compile, regenerate the offset file, so that we
    # can compare it with the version in the source code repository.

    # Generate the C code for the program that will output the offset file.
    $(GENSRC_X11WRAPPERS_TMP)/sizer.%.c : $(GENSRC_SIZER_DIR)/xlibtypes.txt $(BUILD_TOOLS)
	$(ECHO) "Generating X11 wrapper ($*-bit version)"
	$(MKDIR) -p $(@D)
	$(TOOL_WRAPPERGENERATOR) $(@D) $(GENSRC_SIZER_DIR)/xlibtypes.txt "sizer" $*

    # use -m32/-m64 only if the compiler supports it
    ifeq ($(COMPILER_SUPPORTS_TARGET_BITS_FLAG),true)
    MEMORY_MODEL_FLAG="-m$*"
    endif

    # Compile the C code into an executable.
    $(GENSRC_X11WRAPPERS_TMP)/sizer.%.exe : $(GENSRC_X11WRAPPERS_TMP)/sizer.%.c
	$(MKDIR) -p $(@D)
	(cd $(@D) && $(CC) $(MEMORY_MODEL_FLAG) -o $@ $< \
              $(X_CFLAGS) \
              $(X_LIBS) \
              -I$(JDK_OUTPUTDIR)/include \
              -I$(JDK_TOPDIR)/src/share/javavm/export \
              -I$(JDK_TOPDIR)/src/$(OPENJDK_TARGET_OS_API_DIR)/javavm/export \
              -I$(JDK_TOPDIR)/src/share/native/common \
              -I$(JDK_TOPDIR)/src/$(OPENJDK_TARGET_OS_API_DIR)/native/common \
              -I$(JDK_TOPDIR)/src/solaris/native/sun/awt \
	      -I$(JDK_TOPDIR)/src/share/native/sun/awt/debug \
	      -I$(JDK_TOPDIR)/src/share/native/sun/awt/image/cvutils -lc)

    .PRECIOUS: $(GENSRC_X11WRAPPERS_TMP)/sizer.%.exe $(GENSRC_X11WRAPPERS_TMP)/sizer.%.c

    # Run the executable create the offset file and check that it is identical
    # to the offset file in the source code repository.
    $(GENSRC_X11WRAPPERS_TMP)/sizes.%.verification : $(GENSRC_X11WRAPPERS_TMP)/sizer.%.exe
	$(MKDIR) -p $(@D)
	$(GENSRC_X11WRAPPERS_TMP)/sizer.$*.exe | $(SORT) > $@.tmp
	$(ECHO) Verifying $(GENSRC_X11WRAPPERS_TMP)/sizes.$*.verification.tmp to $(GENSRC_X11WRAPPERS_TMP)/sizes.$*
	$(DIFF) $(GENSRC_X11WRAPPERS_TMP)/sizes.$*.verification.tmp $(GENSRC_X11WRAPPERS_TMP)/sizes.$*
	mv $@.tmp $@

    GENSRC_X11WRAPPERS += $(GENSRC_X11WRAPPERS_TMP)/sizes.$(OPENJDK_TARGET_CPU_BITS).verification
endif