# ===========================================================================

# crosstool-NG genererated config files

# These targets are used from top-level makefile

#-----------------------------------------------------------

# List all config files, wether sourced or generated

# The top-level config file to be used be configurators

KCONFIG_TOP = config/config.in

# Build the list of all source config files

STATIC_CONFIG_FILES = $(patsubst $(CT_LIB_DIR)/%,%,$(shell find $(CT_LIB_DIR)/config -type f -name '*.in' 2>/dev/null))

# ... and how to access them:

$(STATIC_CONFIG_FILES): config

# Build a list of per-component-type source config files

ARCH_CONFIG_FILES   = $(patsubst $(CT_LIB_DIR)/%,%,$(wildcard $(CT_LIB_DIR)/config/arch/*.in))

KERNEL_CONFIG_FILES = $(patsubst $(CT_LIB_DIR)/%,%,$(wildcard $(CT_LIB_DIR)/config/kernel/*.in))

CC_CONFIG_FILES     = $(patsubst $(CT_LIB_DIR)/%,%,$(wildcard $(CT_LIB_DIR)/config/cc/*.in))

LIBC_CONFIG_FILES   = $(patsubst $(CT_LIB_DIR)/%,%,$(wildcard $(CT_LIB_DIR)/config/libc/*.in))

DEBUG_CONFIG_FILES  = $(patsubst $(CT_LIB_DIR)/%,%,$(wildcard $(CT_LIB_DIR)/config/debug/*.in))

# Build the list of generated config files

GEN_CONFIG_FILES = config.gen/arch.in     \

                   config.gen/kernel.in   \

                   config.gen/cc.in       \

                   config.gen/libc.in     \

                   config.gen/debug.in

# ... and how to access them:

# Generated files depends on config.mk (this file) because it has the

# functions needed to build the genrated files, and thus they might

# need re-generation if config.mk changes

$(GEN_CONFIG_FILES): config.gen                         \

                     $(CT_LIB_DIR)/config/config.mk

# Helper entry for the configurators

PHONY += config_files

config_files: $(STATIC_CONFIG_FILES) $(GEN_CONFIG_FILES)

# Where to access to the source config files from

config:

	@$(ECHO) "  LN    config"

	$(SILENT)ln -s $(CT_LIB_DIR)/config config

# Where to store the generated config files into

config.gen:

	@$(ECHO) "  MKDIR config.gen"

	$(SILENT)mkdir -p config.gen

#-----------------------------------------------------------

# Build list of per-component-type items to easily build generated files

ARCHS   = $(patsubst config/arch/%.in,%,$(ARCH_CONFIG_FILES))

KERNELS = $(patsubst config/kernel/%.in,%,$(KERNEL_CONFIG_FILES))

CCS     = $(patsubst config/cc/%.in,%,$(CC_CONFIG_FILES))

LIBCS   = $(patsubst config/libc/%.in,%,$(LIBC_CONFIG_FILES))

DEBUGS  = $(patsubst config/debug/%.in,%,$(DEBUG_CONFIG_FILES))

#-----------------------------------------------------------

# Helper functions to ease building generated config files

# The function 'build_gen_choice_in' builds a choice-menu of a list of

# components in the given list, also adding source-ing of associazted

# config files:

# $1 : destination file

# $2 : name for the entries family (eg. Architecture, kernel...)

# $3 : prefix for the choice entries (eg. ARCH, KERNEL...)

# $4 : base directory containing config files

# $5 : generate backend conditionals if Y, don't if anything else

# $6 : list of config entries (eg. for architectures: "alpha arm ia64"...,

#      and for kernels: "bare-metal linux"...)

# Example to build the kernels generated config file:

# $(call build_gen_choice_in,config.gen/kernel.in,Target OS,KERNEL,config/kernel,$(KERNELS))

define build_gen_choice_in

	@$(ECHO) '  IN    $(1)'

	$(SILENT)(echo "# $(2) menu";                                           \

	  echo "# Generated file, do not edit!!!";                              \

	  echo "";                                                              \

	  echo "choice";                                                        \

	  echo "    bool";                                                      \

	  echo "    prompt \"$(2)\"";                                           \

	  echo "";                                                              \

	  for entry in $(6); do                                                 \

	    file="$(4)/$${entry}.in";                                           \

	    _entry=$$(echo "$${entry}" |$(sed) -r -s -e 's/[-.+]/_/g;');        \

	    echo "config $(3)_$${_entry}";                                      \

	    echo "    bool";                                                    \

	    echo "    prompt \"$${entry}\"";                                    \

	    dep_val=$$($(grep) -E '^# depends on ' $${file} 2>/dev/null);       \

	    if [ -n "$${dep_val}" ]; then                                       \

	      echo "    $${dep_val#\# }";                                       \

	    fi;                                                                 \

	    if [ "$(5)" = "Y" ]; then                                           \

	      echo "    depends on BACKEND_$(3) = \"$${_entry}\" || ! BACKEND"; \

	    fi;                                                                 \

	    echo "";                                                            \

	  done;                                                                 \

	  echo "endchoice";                                                     \

	  for entry in $(6); do                                                 \

	    file="$(4)/$${entry}.in";                                           \

	    _entry=$$(echo "$${entry}" |$(sed) -r -s -e 's/[-.+]/_/g;');        \

	    echo "";                                                            \

	    echo "if $(3)_$${_entry}";                                          \

	    echo "config $(3)";                                                 \

	    echo "    default \"$${entry}\" if $(3)_$${_entry}";                \

	    echo "source $${file}";                                             \

	    echo "endif";                                                       \

	  done;                                                                 \

	  echo "";                                                              \

	  for file in $(wildcard $(4)/*.in-common); do                          \

	    echo "source $${file}";                                             \

	  done;                                                                 \

	 ) >$(1)

endef

# The function 'build_gen_menu_in' builds a menuconfig for each component in

# the given list, source-ing the associated files conditionnaly:

# $1 : destination file

# $2 : name of entries family (eg. Tools, Debug...)

# $3 : prefix for the menu entries (eg. DEBUG)

# $4 : base directory containing config files

# $5 : list of config entries (eg. for debug: "dmalloc duma gdb"...)

# Example to build the generated debug config file:

# $(call build_gen_menu_in,config.gen/debug.in,Debug,DEBUG,config/debug,$(DEBUGS))

define build_gen_menu_in

	@$(ECHO) '  IN    $(1)'

	$(SILENT)(echo "# $(2) facilities menu";                                \

	  echo "# Generated file, do not edit!!!";                              \

	  echo "";                                                              \

	  for entry in $(5); do                                                 \

	    file="$(4)/$${entry}.in";                                           \

	    _entry=$$(echo "$${entry}" |$(sed) -r -s -e 's/[-.+]/_/g;');        \

	    echo "menuconfig $(3)_$${_entry}";                                  \

	    echo "    bool";                                                    \

	    echo "    prompt \"$${entry}\"";                                    \

	    dep_val=$$($(grep) -E '^# depends on ' $${file} 2>/dev/null);       \

	    if [ -n "$${dep_val}" ]; then                                       \

	      echo "    $${dep_val#\# }";                                       \

	    fi;                                                                 \

	    echo "if $(3)_$${_entry}";                                          \

	    echo "source $${file}";                                             \

	    echo "endif";                                                       \

	    echo "";                                                            \

	  done;                                                                 \

	 ) >$(1)

endef

#-----------------------------------------------------------

# The rules for the generated config files

config.gen/arch.in: $(ARCH_CONFIG_FILES)

	$(call build_gen_choice_in,$@,Target Architecture,ARCH,config/arch,Y,$(ARCHS))

config.gen/kernel.in: $(KERNEL_CONFIG_FILES)

	$(call build_gen_choice_in,$@,Target OS,KERNEL,config/kernel,Y,$(KERNELS))

config.gen/cc.in: $(CC_CONFIG_FILES)

	$(call build_gen_choice_in,$@,C compiler,CC,config/cc,,$(CCS))

config.gen/libc.in: $(LIBC_CONFIG_FILES)

	$(call build_gen_choice_in,$@,C library,LIBC,config/libc,,$(LIBCS))

config.gen/debug.in: $(DEBUG_CONFIG_FILES)

	$(call build_gen_menu_in,$@,Debug,DEBUG,config/debug,$(DEBUGS))

#-----------------------------------------------------------

# Cleaning up the mess...

clean::

	@$(ECHO) "  CLEAN config"

	$(SILENT)rm -f config 2>/dev/null || true

	@$(ECHO) "  CLEAN config.gen"

	$(SILENT)rm -rf config.gen