#  Makefile.rules - OCERA make framework common project rules -*- makefile -*-
#
#  (C) Copyright 2003 by Pavel Pisa - OCERA team member
#  (C) Copyright 2006 by Michal Sojka - Czech Technical University, FEE, DCE
#
# The OMK build system is distributed under the GNU General Public
# License.  See file COPYING for details.
#
# input variables
# V                .. if set to 1, full command text is shown else short form is used
# SUBDIRS          .. list of subdirectories intended for make from actual directory
# default_CONFIG   .. list of default config assignments CONFIG_XXX=y/n ...

# We need to ensure definition of sources directory first
ifndef SOURCES_DIR
SOURCES_DIR := $(shell ( pwd -L ) )
endif

.PHONY: all default check-make-ver

all: check-make-ver default
	@echo "Compilation finished"

#=========================
# Include the config file

ifneq ($(CONFIG_FILE_OK),y)
ifndef CONFIG_FILE
CONFIG_FILE      := $(MAKERULES_DIR)/config.omk
endif
ifneq ($(wildcard $(CONFIG_FILE)-default),)
-include $(CONFIG_FILE)-default
else
ifneq ($(MAKECMDGOALS),default-config)
$(warning Please, run "make default-config" first)
endif
endif

ifneq ($(wildcard $(CONFIG_FILE)),)
include $(CONFIG_FILE)
CONFIG_FILE_OK = y
endif
endif #$(CONFIG_FILE_OK)

export SOURCES_DIR MAKERULES_DIR RELATIVE_DIR
export CONFIG_FILE OMK_SERIALIZE_INCLUDED OMK_VERBOSE OMK_SILENT
# OMK_SERIALIZE_INCLUDED has to be exported to submakes because passes
# must to be serialized only in the toplevel make.

ifndef RELATIVE_DIR
RELATIVE_DIR := $(SOURCES_DIR:$(MAKERULES_DIR)%=%)
endif
override RELATIVE_DIR := $(RELATIVE_DIR:/%=%)
override RELATIVE_DIR := $(RELATIVE_DIR:\\%=%)
#$(warning  RELATIVE_DIR $(RELATIVE_DIR))
override BACK2TOP_DIR := $(shell echo $(RELATIVE_DIR)/ | sed -e 's_//_/_g' -e 's_/\./_/_g' -e 's_^\./__g'  -e 's_\([^/][^/]*\)_.._g' -e 's_/$$__')
#$(warning  BACK2TOP_DIR $(BACK2TOP_DIR))

#$(warning SOURCES_DIR = $(SOURCES_DIR))
#$(warning MAKERULES_DIR = $(MAKERULES_DIR))
#$(warning RELATIVE_DIR = $(RELATIVE_DIR))

#vpath %.c $(SOURCES_DIR)
#vpath %.cc $(SOURCES_DIR)
#vpath %.cxx $(SOURCES_DIR)

VPATH = $(SOURCES_DIR)
srcdir = $(SOURCES_DIR)

# Defines for quiet compilation
ifdef V
  ifeq ("$(origin V)", "command line")
    OMK_VERBOSE = $(V)
  endif
endif
ifndef OMK_VERBOSE
  OMK_VERBOSE = 0
endif
ifeq ($(OMK_VERBOSE),1)
  Q =
else
  Q = @
endif
ifneq ($(findstring s,$(MAKEFLAGS)),)
  QUIET_CMD_ECHO = true
  OMK_SILENT = 1
else
  QUIET_CMD_ECHO = echo
endif

# ===================================================================
# We have set up all important variables, so we can check and include
# real OCERA style Makefile.omk now
ifndef OMK_INCLUDED
include $(SOURCES_DIR)/Makefile.omk
OMK_INCLUDED := 1
endif


check-make-ver:
	@GOOD_MAKE_VERSION=`echo $(MAKE_VERSION) | sed -n -e 's/^[4-9]\..*\|^3\.9[0-9].*\|^3\.8[1-9].*/y/p'` ; \
	if [ x$$GOOD_MAKE_VERSION != xy ] ; then \
		echo "Your make program version is too old and does not support OMK system." ; \
		echo "Please update to make program 3.81beta1 or newer." ; exit 1 ; \
	fi

distclean dist-clean:
	@$(QUIET_CMD_ECHO) "  RM      $(COMPILED_DIR_NAME) $(BUILD_DIR_NAME)"
	@rm -fr $(MAKERULES_DIR)/$(COMPILED_DIR_NAME)  $(MAKERULES_DIR)/$(BUILD_DIR_NAME)

# Common OMK templates
# ====================

# Syntax: $(call mkdir,<dir name>)
define mkdir_def
	[ -d $(1) ] || mkdir -p $(1) || exit 1
endef

ifneq ($(V),2)
NO_PRINT_DIRECTORY := --no-print-directory
endif

# Syntax: $(call omk_pass_template,<pass name>,<build dir>,[<local make flags>],[<local condition>])
define omk_pass_template
.PHNOY: $(1) $(1)-local
$(1):
	+@$(foreach dir,$(SUBDIRS),$(call mkdir_def,$(2)/$(dir)); \
		$(MAKE) SOURCES_DIR=$(SOURCES_DIR)/$(dir) $(NO_PRINT_DIRECTORY) \
		RELATIVE_DIR=$(RELATIVE_DIR)/$(dir) -C $(2)/$(dir) \
		-f $(SOURCES_DIR)/$(dir)/Makefile $$@ || exit 1 ;) true
ifneq ($(4),)
	@echo "make[omk]: $$@ in $(RELATIVE_DIR)"; \
	$(call mkdir_def,$(2)); \
	$(MAKE) $(NO_PRINT_DIRECTORY) -C $(2) \
	        -f $(SOURCES_DIR)/Makefile $(3) $$(@:%=%-local)
endif
endef

# =======================
# DEFAULT CONFIG PASS

default-config:
	@echo "# Start of OMK config file" > "$(CONFIG_FILE)-default"
	@echo "# This file should not be altered manually" >> "$(CONFIG_FILE)-default"
	@echo "# Overrides should be stored in file $(notdir $(CONFIG_FILE))" >> "$(CONFIG_FILE)-default"
	@echo >> "$(CONFIG_FILE)-default"
	@$(MAKE) $(NO_PRINT_DIRECTORY) -C $(MAKERULES_DIR) \
		RELATIVE_DIR="" SOURCES_DIR=$(MAKERULES_DIR) \
		-f $(MAKERULES_DIR)/Makefile default-config-pass

$(eval $(call omk_pass_template,default-config-pass,$$(LOCAL_BUILD_DIR),,always))

default-config-pass-local:
#	@echo Default config for $(RELATIVE_DIR)
	@echo "# Config for $(RELATIVE_DIR)" >> "$(CONFIG_FILE)-default"
	@$(foreach x, $(default_CONFIG), echo $(x) | \
		sed -e 's/^.*=x$$/#\0/' >> "$(CONFIG_FILE)-default" ; )