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# Copyright (c) 2012, 2013, 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 ($(COMPILER_SUPPORTS_TARGET_BITS_FLAG), true)
    MEMORY_MODEL_FLAG="$(COMPILER_TARGET_BITS_FLAG)$*"
  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/$(OPENJDK_TARGET_OS_EXPORT_DIR)/javavm/export \
	    -I$(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