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

# crosstool-NG configuration targets

# These targets are used from top-level makefile

# Derive the project version from, well, the project version:

export PROJECTVERSION=$(CT_VERSION)

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

# Some static /configuration/

KCONFIG_TOP = config/config.in

obj = kconfig

PHONY += clean help oldconfig menuconfig defoldconfig

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

# List all config files, source and generated

# 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))

TOOL_CONFIG_FILES   = $(patsubst $(CT_LIB_DIR)/%,%,$(wildcard $(CT_LIB_DIR)/config/tools/*.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/tools.in    \

                   config.gen/debug.in

# ... and how to access them:

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

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

# need re-generation if kconfig.mk changes

$(GEN_CONFIG_FILES): config.gen                         \

                     $(CT_LIB_DIR)/kconfig/kconfig.mk

# KCONFIG_TOP should already be in STATIC_CONFIG_FILES, anyway...

CONFIG_FILES = $(sort $(KCONFIG_TOP) $(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))

TOOLS   = $(patsubst config/tools/%.in,%,$(TOOL_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 : 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 $(5); do                                             \

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

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

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

	    echo "    bool";                                                \

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

	    if grep -E '^# +EXPERIMENTAL$$' $${file} >/dev/null 2>&1; then  \

	      echo " (EXPERIMENTAL)\"";                                     \

	      echo "    depends on EXPERIMENTAL";                           \

	    else                                                            \

	      echo "\"";                                                    \

	    fi;                                                             \

	  done;                                                             \

	  echo "";                                                          \

	  echo "endchoice";                                                 \

	  for entry in $(5); 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;                                                             \

	 ) >$(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. TOOL, DEBUG)

# $4 : base directory containing config files

# $5 : list of config entries (eg. for tools: "libelf sstrip"..., and for

#      debug: "dmalloc duma gdb"...)

# Example to build the tools generated config file:

# $(call build_gen_menu_in,config.gen/tools.in,Tools,TOOL,config/tools,$(TOOLS))

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";                                                \

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

	    if grep -E '^# +EXPERIMENTAL$$' $${file} >/dev/null 2>&1; then  \

	      echo " (EXPERIMENTAL)\"";                                     \

	      echo "    depends on EXPERIMENTAL";                           \

	    else                                                            \

	      echo "\"";                                                    \

	    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,$(ARCHS))

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

	$(call build_gen_choice_in,$@,Target OS,KERNEL,config/kernel,$(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/tools.in: $(TOOL_CONFIG_FILES)

	$(call build_gen_menu_in,$@,Tools,TOOL,config/tools,$(TOOLS))

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

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

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

# The configurators rules

menuconfig: $(obj)/mconf $(CONFIG_FILES)

	$(SILENT)$< $(KCONFIG_TOP)

oldconfig: $(obj)/conf .config $(CONFIG_FILES)

	$(SILENT)$< -s $(KCONFIG_TOP)

defoldconfig: $(obj)/conf .config $(CONFIG_FILES)

	$(SILENT)yes "" |$< -s $(KCONFIG_TOP)

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

# Help text used by make help

help-config::

	@echo  '  menuconfig         - Update current config using a menu based program'

	@echo  '  oldconfig          - Update current config using a provided .config as base'

	@echo  '  defoldconfig       - As oldconfig, above, but using defaults for new options'

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

# Hmmm! Cheesy build!

# Or: where I can unveil my make-fu... :-]

# Oh! Files not here are there, in fact! :-)

vpath %.c $(CT_LIB_DIR)

vpath %.h $(CT_LIB_DIR)

# What is the compiler?

HOST_CC ?= gcc -funsigned-char

# Compiler flags to use gettext

EXTRA_CFLAGS += $(shell $(SHELL) $(CT_LIB_DIR)/kconfig/check-gettext.sh $(HOST_CC) $(CFLAGS))

# Compiler and linker flags to use ncurses

EXTRA_CFLAGS += $(shell $(SHELL) $(CT_LIB_DIR)/kconfig/lxdialog/check-lxdialog.sh -ccflags)

EXTRA_LDFLAGS += $(shell $(SHELL) $(CT_LIB_DIR)/kconfig/lxdialog/check-lxdialog.sh -ldflags $(HOST_CC))

# Common source files, and lxdialog source files

SRC = kconfig/zconf.tab.c

LXSRC = $(patsubst $(CT_LIB_DIR)/%,%,$(wildcard $(CT_LIB_DIR)/kconfig/lxdialog/*.c))

# What's needed to build 'conf'

conf_SRC  = $(SRC) kconfig/conf.c

conf_OBJ  = $(patsubst %.c,%.o,$(conf_SRC))

# What's needed to build 'mconf'

mconf_SRC = $(SRC) $(LXSRC) kconfig/mconf.c

mconf_OBJ = $(patsubst %.c,%.o,$(mconf_SRC))

# Cheesy auto-dependencies

DEPS = $(patsubst %.c,%.d,$(sort $(conf_SRC) $(mconf_SRC)))

# This is not very nice, as they will get rebuild even if (dist)cleaning... :-(

# Should look into the Linux kernel Kbuild to see how they do that...

# To really make me look into this, keep the annoying "DEP xxx" messages.

# Also see the comment for the "%.o: %c" rule below

%.d: %.c $(CT_LIB_DIR)/kconfig/kconfig.mk

	$(SILENT)if [ ! -d $(obj)/lxdialog ]; then  \

	   $(ECHO) "  MKDIR $(obj)";           \

	   mkdir -p $(obj)/lxdialog;        \

	 fi

	@$(ECHO) "  DEP   $@"

	$(SILENT)$(HOST_CC) $(CFLAGS) $(EXTRA_CFLAGS) -MM $< |sed -r -e 's|([^:]+.o)( *:+)|$(<:.c=.o) $@\2|;' >$@

-include $(DEPS)

# Each .o must depend on the corresponding .c (obvious, isn't it?),

# but *can not* depend on kconfig/, because kconfig can be touched

# during the build (who's touching it, btw?) so each .o would be

# re-built when they sould not be.

# So manually check for presence of $(obj) (ie. kconfig), and only mkdir

# if needed. After all, that's not so bad...

# mkdir $(obj)/lxdialog, because we need it, and incidentally, that

# also creates $(obj).

# Also rebuild the object files is the makefile is changed

%.o: %.c $(CT_LIB_DIR)/kconfig/kconfig.mk

	$(SILENT)if [ ! -d $(obj)/lxdialog ]; then  \

	   $(ECHO) "  MKDIR $(obj)";           \

	   mkdir -p $(obj)/lxdialog;        \

	 fi

	@$(ECHO) "  CC    $@"

	$(SILENT)$(HOST_CC) $(CFLAGS) $(EXTRA_CFLAGS) -o $@ -c $<

$(obj)/mconf: $(mconf_OBJ)

	@$(ECHO) '  LD    $@'

	$(SILENT)$(HOST_CC) $(CFLAGS) $(EXTRA_CFLAGS) $(LDFLAGS) $(EXTRA_LDFLAGS) -o $@ $^

$(obj)/conf: $(conf_OBJ)

	@$(ECHO) '  LD    $@'

	$(SILENT)$(HOST_CC) $(CFLAGS) $(EXTRA_CFLAGS) $(LDFLAGS) $(EXTRA_LDFLAGS) -o $@ $^

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

# Cleaning up the mess...

clean::

	@$(ECHO) "  CLEAN kconfig"

	$(SILENT)rm -f kconfig/{,m}conf $(conf_OBJ) $(mconf_OBJ) $(DEPS)

	$(SILENT)rmdir --ignore-fail-on-non-empty kconfig{/lxdialog,} 2>/dev/null || true

	@$(ECHO) "  CLEAN config"

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

	@$(ECHO) "  CLEAN config.gen"

	$(SILENT)rm -rf config.gen