#
# Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved.
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
#
# This code is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 2 only, as
# published by the Free Software Foundation.  Oracle designates this
# particular file as subject to the "Classpath" exception as provided
# by Oracle in the LICENSE file that accompanied this code.
#
# This code is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
# version 2 for more details (a copy is included in the LICENSE file that
# accompanied this code).
#
# You should have received a copy of the GNU General Public License version
# 2 along with this work; if not, write to the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
# or visit www.oracle.com if you need additional information or have any
# questions.
#

################################################################################
# This is the bootstrapping part of the build. This file is included from the
# top level Makefile, and is responsible for launching the Main.gmk file with
# the proper make and the proper make arguments.
################################################################################

# This must be the first rule
default:
.PHONY: default

# Inclusion of this pseudo-target will cause make to execute this file
# serially, regardless of -j.
.NOTPARALLEL:

# If included from the top-level Makefile then topdir is set, but not when
# recursively calling ourself with a spec.
ifeq ($(topdir),)
  topdir := $(strip $(patsubst %/make/, %, $(dir $(lastword $(MAKEFILE_LIST)))))
endif

# Our helper functions. Will include $(SPEC) if $(HAS_SPEC) is true.
include $(topdir)/make/InitSupport.gmk

# Here are "global" targets, i.e. targets that can be executed without having a configuration.
# This will define ALL_GLOBAL_TARGETS.
include $(topdir)/make/Help.gmk

# Extract main targets from Main.gmk.
ifneq ($(any_spec_file), )
  ifeq ($(wildcard $(dir $(any_spec_file))/make-support/module-deps.gmk),)
    # If make-support does not exist, we need to build the genmodules java tool first.
    $(info Creating data for first make execution in new configuration...)
    ignore_output := $(shell $(MAKE) -r -R -f $(topdir)/make/Main.gmk \
        -I $(topdir)/make/common SPEC=$(any_spec_file) NO_RECIPES=true FRC)
    $(info Done)
  endif
  ALL_MAIN_TARGETS := $(shell $(MAKE) -r -R -f $(topdir)/make/Main.gmk \
      -I $(topdir)/make/common SPEC=$(any_spec_file) NO_RECIPES=true print-targets)
else
  # Without at least a single valid configuration, we cannot extract any real
  # targets. To provide a helpful error message about the missing configuration
  # later on, accept whatever targets the user has provided for now.
  ALL_MAIN_TARGETS := $(if $(MAKECMDGOALS), $(MAKECMDGOALS), default)
endif

# Targets provided by this file.
ALL_INIT_TARGETS := reconfigure

ALL_TARGETS := $(sort $(ALL_GLOBAL_TARGETS) $(ALL_MAIN_TARGETS) $(ALL_INIT_TARGETS))

ifneq ($(findstring qp, $(MAKEFLAGS)),)
  ##############################################################################
  # When called with -qp, assume an external part (e.g. bash completion) is trying
  # to understand our targets. Just list our targets and do no more checking.
  ##############################################################################

  $(ALL_TARGETS):

  .PHONY: $(ALL_TARGETS)

else ifeq ($(HAS_SPEC),)

  ##############################################################################
  # This is the normal case, we have been called from the command line by the
  # user and we need to call ourself back with a proper SPEC.
  ##############################################################################

  $(eval $(call CheckControlVariables))
  $(eval $(call CheckDeprecatedEnvironment))
  $(eval $(call CheckInvalidMakeFlags))

  $(eval $(call ParseConfCheckOption))

  # Check that the LOG given is valid, and set LOG_LEVEL, LOG_NOFILE and MAKE_LOG_FLAGS.
  $(eval $(call ParseLogLevel))

  ifneq ($(findstring $(LOG_LEVEL),info debug trace),)
    $(info Running make as '$(strip $(MAKE) $(MFLAGS) $(COMMAND_LINE_VARIABLES) $(MAKECMDGOALS))')
  endif

  # CALLED_TARGETS is the list of targets that the user provided,
  # or "default" if unspecified.
  CALLED_TARGETS := $(if $(MAKECMDGOALS), $(MAKECMDGOALS), default)
  CALLED_SPEC_TARGETS := $(filter $(ALL_MAIN_TARGETS) $(ALL_INIT_TARGETS), $(CALLED_TARGETS))
  ifneq ($(CALLED_SPEC_TARGETS),)
    # We have at least one non-global target, which need a SPEC
    $(eval $(call ParseConfAndSpec))
    # Now SPECS contain 1..N spec files (otherwise ParseConfAndSpec fails)

    INIT_TARGETS := $(filter $(ALL_INIT_TARGETS), $(CALLED_SPEC_TARGETS))
    SEQUENTIAL_TARGETS := $(filter dist-clean clean%, $(CALLED_SPEC_TARGETS))
    PARALLEL_TARGETS := $(filter-out $(INIT_TARGETS) $(SEQUENTIAL_TARGETS), $(CALLED_SPEC_TARGETS))

    # The spec files depend on the autoconf source code. This check makes sure
    # the configuration is up to date after changes to configure.
    $(SPECS): $(wildcard $(topdir)/common/autoconf/*)
        ifeq ($(CONF_CHECK), fail)
	  @echo "Error: The configuration is not up to date for '$(lastword $(subst /, , $(dir $@)))'."
	  $(call PrintConfCheckFailed)
	  @exit 2
        else ifeq ($(CONF_CHECK), auto)
	  @echo "Note: The configuration is not up to date for '$(lastword $(subst /, , $(dir $@)))'."
	  @( cd $(topdir) && \
	      $(MAKE) $(MFLAGS) $(MAKE_LOG_FLAGS) -f $(topdir)/make/Init.gmk SPEC=$@ HAS_SPEC=true \
	      reconfigure )
        else ifeq ($(CONF_CHECK), ignore)
          # Do nothing
        endif

    # Unless reconfigure is explicitely called, let all targets depend on the spec files to be up to date.
    ifeq ($(findstring reconfigure, $(CALLED_SPEC_TARGETS)), )
      $(CALLED_SPEC_TARGETS): $(SPECS)
    endif

    # The recipe will be run once for every target specified, but we only want to execute the
    # recipe a single time, hence the TARGET_DONE with a dummy command if true.
    $(ALL_MAIN_TARGETS) $(ALL_INIT_TARGETS):
	@$(if $(TARGET_DONE), \
	  true \
	, \
	  $(foreach spec, $(SPECS), \
	    ( cd $(topdir) && \
	    $(MAKE) $(MFLAGS) $(MAKE_LOG_FLAGS) -j 1 -f $(topdir)/make/Init.gmk \
	        SPEC=$(spec) HAS_SPEC=true \
	        USER_MAKE_VARS="$(USER_MAKE_VARS)" MAKE_LOG_FLAGS=$(MAKE_LOG_FLAGS) \
	        LOG_LEVEL=$(LOG_LEVEL) LOG_NOFILE=$(LOG_NOFILE) \
	        INIT_TARGETS="$(INIT_TARGETS)" SEQUENTIAL_TARGETS="$(SEQUENTIAL_TARGETS)" \
	        PARALLEL_TARGETS="$(PARALLEL_TARGETS)"  \
	        main ) && \
	  ) true \
	  $(eval TARGET_DONE=true) \
	)

    .PHONY: $(ALL_MAIN_TARGETS) $(ALL_INIT_TARGETS)

  endif # has $(CALLED_SPEC_TARGETS)

else # HAS_SPEC=true

  ##############################################################################
  # Now we have a spec. This part provides the "main" target that acts as a
  # trampoline to call the Main.gmk with the value of $(MAKE) found in the spec
  # file.
  ##############################################################################

  ifeq ($(LOG_NOFILE), true)
    # Disable log wrapper if LOG=[level,]nofile was given
    override BUILD_LOG_WRAPPER :=
  endif

  ifeq ($(OUTPUT_SYNC_SUPPORTED), true)
    OUTPUT_SYNC_FLAG := -O$(OUTPUT_SYNC)
  endif

  $(eval $(call CheckSpecSanity))

  reconfigure:
        ifneq ($(CONFIGURE_COMMAND_LINE), )
	  $(ECHO) "Re-running configure using arguments '$(CONFIGURE_COMMAND_LINE)'"
        else
	  $(ECHO) "Re-running configure using default settings"
        endif
	( cd $(OUTPUT_ROOT) && PATH="$(ORIGINAL_PATH)" \
	    $(BASH) $(TOPDIR)/configure $(CONFIGURE_COMMAND_LINE) )

  main-init:
	$(call RotateLogFiles)
	$(BUILD_LOG_WRAPPER) $(PRINTF) "Building target(s) '$(strip \
	    $(INIT_TARGETS) $(SEQUENTIAL_TARGETS) $(PARALLEL_TARGETS) \
	    )' in configuration '$(CONF_NAME)'\n"


  # MAKEOVERRIDES is automatically set and propagated by Make to sub-Make calls.
  # We need to clear it of the init-specific variables. The user-specified
  # variables are explicitely propagated using $(USER_MAKE_VARS).
  main: MAKEOVERRIDES :=

  main: $(INIT_TARGETS) main-init
        ifneq ($(SEQUENTIAL_TARGETS), )
          # Don't touch build output dir since we might be cleaning. That means
	  # no log wrapper.
	  ( cd $(TOPDIR) && \
	      $(MAKE) $(MAKE_ARGS) -j 1 -f make/Main.gmk $(USER_MAKE_VARS) \
	      $(SEQUENTIAL_TARGETS) \
	  )
        endif
        ifneq ($(PARALLEL_TARGETS), )
	  $(call StartGlobalTimer)
	  $(call PrepareSmartJavac)
	  ( cd $(TOPDIR) && \
	      $(BUILD_LOG_WRAPPER) $(MAKE) $(MAKE_ARGS) $(OUTPUT_SYNC_FLAG) \
	      -j $(JOBS) -f make/Main.gmk $(USER_MAKE_VARS) \
	      $(PARALLEL_TARGETS) \
	  )
	  $(call CleanupSmartJavac)
	  $(call StopGlobalTimer)
	  $(call ReportBuildTimes)
        endif
	$(BUILD_LOG_WRAPPER) $(PRINTF) "Finished building target(s) '$(strip \
	    $(INIT_TARGETS) $(SEQUENTIAL_TARGETS) $(PARALLEL_TARGETS) \
	    )' in configuration '$(CONF_NAME)'\n"

  .PHONY: reconfigure main-init main
endif