crosstool-ng/kconfig/kconfig.mk

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# ===========================================================================
# 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)
# The place where the kconfig stuff lies
obj = kconfig
#-----------------------------------------------------------
# The configurators rules
configurators = menuconfig oldconfig
PHONY += $(configurators)
$(configurators): config_files
menuconfig: $(obj)/mconf
@$(ECHO) " CONF $(KCONFIG_TOP)"
$(SILENT)$< $(KCONFIG_TOP)
oldconfig: $(obj)/conf .config
@$(ECHO) " CONF $(KCONFIG_TOP)"
$(SILENT)$< -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'
#-----------------------------------------------------------
# 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
HOST_LD ?= gcc
# Helpers
check_gettext = $(CT_LIB_DIR)/kconfig/check-gettext.sh
check_lxdialog = $(CT_LIB_DIR)/kconfig/lxdialog/check-lxdialog.sh
# Build flags
CFLAGS =
LDFLAGS =
# Compiler flags to use gettext
INTL_CFLAGS = $(shell $(SHELL) $(check_gettext) $(HOST_CC) $(EXTRA_CFLAGS))
# Compiler and linker flags to use ncurses
NCURSES_CFLAGS = $(shell $(SHELL) $(check_lxdialog) -ccflags)
NCURSES_LDFLAGS = $(shell $(SHELL) $(check_lxdialog) -ldflags $(HOST_CC) $(LX_FLAGS) $(EXTRA_CFLAGS))
# Common source files
COMMON_SRC = kconfig/zconf.tab.c
COMMON_OBJ = $(patsubst %.c,%.o,$(COMMON_SRC))
COMMON_DEP = $(patsubst %.o,%.dep,$(COMMON_OBJ))
$(COMMON_OBJ) $(COMMON_DEP): CFLAGS += $(INTL_CFLAGS)
# lxdialog source files
LX_SRC = $(patsubst $(CT_LIB_DIR)/%,%,$(wildcard $(CT_LIB_DIR)/kconfig/lxdialog/*.c))
LX_OBJ = $(patsubst %.c,%.o,$(LX_SRC))
LX_DEP = $(patsubst %.o,%.dep,$(LX_OBJ))
$(LX_OBJ) $(LX_DEP): CFLAGS += $(NCURSES_CFLAGS) $(INTL_CFLAGS)
# What's needed to build 'conf'
conf_SRC = kconfig/conf.c
conf_OBJ = $(patsubst %.c,%.o,$(conf_SRC))
conf_DEP = $(patsubst %.o,%.dep,$(conf_OBJ))
$(conf_OBJ) $(conf_DEP): CFLAGS += $(INTL_CFLAGS)
# What's needed to build 'mconf'
mconf_SRC = kconfig/mconf.c
mconf_OBJ = $(patsubst %.c,%.o,$(mconf_SRC))
mconf_DEP = $(patsubst %.c,%.dep,$(mconf_SRC))
$(mconf_OBJ) $(mconf_DEP): CFLAGS += $(NCURSES_CFLAGS) $(INTL_CFLAGS)
$(obj)/mconf: LDFLAGS += $(NCURSES_LDFLAGS)
ifeq ($(shell uname -o 2>/dev/null || echo unknown),Cygwin)
$(obj)/mconf: LDFLAGS += -Wl,--enable-auto-import
endif
# These are generated files:
ALL_OBJS = $(sort $(COMMON_OBJ) $(LX_OBJ) $(conf_OBJ) $(mconf_OBJ))
ALL_DEPS = $(sort $(COMMON_DEP) $(LX_DEP) $(conf_DEP) $(mconf_DEP))
# Cheesy auto-dependencies
# Only parse the following if a configurator was called, to avoid building
# dependencies when not needed (eg. list-steps, list-samples...)
# We must be carefull what we enclose, because we need some of the variable
# definitions for clean (and distclean) at least.
# Just protecting the "-include $(DEPS)" line should be sufficient.
ifneq ($(strip $(MAKECMDGOALS)),)
ifneq ($(strip $(filter $(configurators),$(MAKECMDGOALS))),)
DEPS = $(COMMON_DEP)
ifneq ($(strip $(filter oldconfig,$(MAKECMDGOALS))),)
DEPS += $(conf_DEP)
endif
ifneq ($(strip $(filter menuconfig,$(MAKECMDGOALS))),)
DEPS += $(mconf_DEP) $(LX_DEP)
endif
-include $(DEPS)
endif # MAKECMDGOALS contains a configurator rule
endif # MAKECMDGOALS != ""
# Each .o or .dep *can not* directly depend on kconfig/, because kconfig can
# be touched during the build (who's touching it, btw?) so each .o or .dep
# would be re-built when it 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).
define check_kconfig_dir
$(SILENT)if [ ! -d $(obj)/lxdialog ]; then \
$(ECHO) " MKDIR $(obj)"; \
mkdir -p $(obj)/lxdialog; \
fi
endef
# Build the dependency for C files
%.dep: %.c $(CT_LIB_DIR)/kconfig/kconfig.mk
$(check_kconfig_dir)
@$(ECHO) " DEP $@"
$(SILENT)$(HOST_CC) $(CFLAGS) $(EXTRA_CFLAGS) -MM $< |sed -r -e 's|([^:]+.o)( *:+)|$(<:.c=.o) $@\2|;' >$@
# Build C files
%.o: %.c $(CT_LIB_DIR)/kconfig/kconfig.mk
$(check_kconfig_dir)
@$(ECHO) " CC $@"
$(SILENT)$(HOST_CC) $(CFLAGS) $(EXTRA_CFLAGS) -o $@ -c $<
# Actual link
$(obj)/mconf: $(COMMON_OBJ) $(LX_OBJ) $(mconf_OBJ)
@$(ECHO) ' LD $@'
$(SILENT)$(HOST_LD) -o $@ $^ $(LDFLAGS) $(EXTRA_LDFLAGS)
$(obj)/conf: $(COMMON_OBJ) $(conf_OBJ)
@$(ECHO) ' LD $@'
$(SILENT)$(HOST_LD) -o $@ $^ $(LDFLAGS) $(EXTRA_LDFLAGS)
#-----------------------------------------------------------
# Cleaning up the mess...
clean::
@$(ECHO) " CLEAN kconfig"
$(SILENT)rm -f kconfig/{,m}conf $(ALL_OBJS) $(ALL_DEPS)
$(SILENT)rmdir --ignore-fail-on-non-empty kconfig{/lxdialog,} 2>/dev/null || true