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# -*-makefile-*-
#
# Copyright (C) 2008, 2009 by Marc Kleine-Budde <mkl@pengutronix.de>
#
# For further information about the PTXdist project and license conditions
# see the README file.
#
#
# nice little helper from eglibc
#
# $(call ptx/opt-dis, VAR) is 'y' if VAR is not 'y', or 'n' otherwise.
# VAR should be a variable name, not a variable reference; this is
# less general, but more terse for the intended use.
# You can use it to add a file to a list if an option group is
# disabled, like this:
# routines-$(call option-disabled, OPTION_POSIX_C_LANG_WIDE_CHAR) += ...
#
define ptx/opt-dis
$(call ptx/ifdef,$(1),n,y)
endef
#
# $(call ptx/ifdef, PTXCONF_SYMBOL, yes, no) is equivalent to the C
# construct:
#
# PTXCONF_SYMBOL ? "yes" : "no"
#
# $(call ptx/ifdef, SYMBOL, yes, no)
# $1, $2, $3
#
define ptx/ifdef
$(strip $(if $(filter y,$($(strip $(1)))),$(2),$(3)))
endef
#
# $(call ptx/ifeq, SYMBOL, val, yes, no) is equivalent to the C
# construct (plus, strings can be compared here, too):
#
# SYMBOL == val ? "yes" : "no"
#
# $(call ptx/ifeq, SYMBOL, val, yes, no)
# $1, $2, $3, $4
#
define ptx/ifeq
$(strip $(if $(filter $(strip $(2)),$($(strip $(1)))),$(3),$(4)))
endef
#
# $(call ptx/endis, PTXCONF_SYMBOL) returns "enable" or "disable"
# depending on the symbol is defined or not
#
# $(call ptx/endis, PTXCONF_SYMBOL)
# $1
#
define ptx/endis
$(call ptx/ifdef, $(1), enable, disable)
endef
#
# $(call ptx/disen, PTXCONF_SYMBOL) returns "disable" or "enable"
# depending on the symbol is defined or not
#
# $(call ptx/disen, PTXCONF_SYMBOL)
# $1
#
define ptx/disen
$(call ptx/ifdef, $(1), disable, enable)
endef
#
# $(call ptx/wwo, PTXCONF_SYMBOL) returns "with" or "without"
# depending on the symbol is defined or not
#
# $(call ptx/wwo, PTXCONF_SYMBOL)
# $1
#
define ptx/wwo
$(call ptx/ifdef, $(1), with, without)
endef
#
# $(call ptx/wow, PTXCONF_SYMBOL) returns "with" or "without"
# depending on the symbol is defined or not
#
# $(call ptx/wow, PTXCONF_SYMBOL)
# $1
#
define ptx/wow
$(call ptx/ifdef, $(1), without, with)
endef
#
# $(call ptx/onoff, PTXCONF_SYMBOL) returns "ON" or "OFF"
# depending on the symbol is defined or not
#
# $(call ptx/onoff, PTXCONF_SYMBOL)
# $1
#
define ptx/onoff
$(call ptx/ifdef, $(1), ON, OFF)
endef
#
# $(call ptx/truefalse, PTXCONF_SYMBOL) returns "true" or "false"
# depending on the symbol is defined or not
#
# $(call ptx/truefalse, PTXCONF_SYMBOL)
# $1
#
define ptx/truefalse
$(call ptx/ifdef, $(1), true, false)
endef
#
# $(call ptx/falsetrue, PTXCONF_SYMBOL) returns "true" or "false"
# depending on the symbol is defined or not
#
# $(call ptx/falsetrue, PTXCONF_SYMBOL)
# $1
#
define ptx/falsetrue
$(call ptx/ifdef, $(1), false, true)
endef
#
# $(call ptx/yesno, PTXCONF_SYMBOL) returns "yes" or "no"
# depending on the symbol is defined or not
#
# $(call ptx/yesno, PTXCONF_SYMBOL)
# $1
#
define ptx/yesno
$(call ptx/ifdef, $(1), yes, no)
endef
define ptx/config-foo
$(strip $(if $($(strip $(1))),
$(if $(call remove_quotes,$($(2))),
$(call remove_quotes,$($(2))),
$(if $(filter update,$(3)),,$(call ptx/error, $(2) is undefined or empty))),
undefined))
endef
#
# $(call ptx/config-version, PTXCONF_SYMBOL,PTXCONF_SYMBOL2) returns:
# - if PTXCONF_SYMBOL is defined:
# - $(PTXCONF_SYMBOL2_VERSION) without quotes if it's not empty
# - fails with an error otherwise
# - 'undefined if PTXCONF_SYMBOL is not defined
# If PTXCONF_SYMBOL2 is empty then PTXCONF_SYMBOL_VERSION is used instead.
#
# This makes it easy to ensure, that the version of a package is defined if
# the package is enabled.
#
define ptx/config-version
$(call ptx/config-foo,$(strip $(1)),$(if $(strip $(2)),$(strip $(2))_VERSION,$(strip $(1))_VERSION))
endef
#
# $(call ptx/config-md5, PTXCONF_SYMBOL,PTXCONF_SYMBOL2) returns:
# - if PTXCONF_SYMBOL is defined:
# - $(PTXCONF_SYMBOL2_MD5) without quotes if it's not empty
# - fails with an error otherwise
# - 'undefined if PTXCONF_SYMBOL is not defined
# If PTXCONF_SYMBOL2 is empty then PTXCONF_SYMBOL_MD5 is used instead.
#
# This makes it easy to ensure, that the md5 sum of a package is defined if
# the package is enabled.
#
define ptx/config-md5
$(call ptx/config-foo,$(strip $(1)),$(if $(strip $(2)),$(strip $(2))_MD5,$(strip $(1))_MD5),$(PTXCONF_SETUP_CHECK))
endef
# vim: syntax=make
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