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# Femto - FEmto's a Makefile TOol

# Copyright (C) 2018 Romain GARBI

# 

# Permission is hereby granted, free of charge, to any person obtaining a copy

# of this software and associated documentation files (the "Software"), to deal

# in the Software without restriction, including without limitation the rights

# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

# copies of the Software, and to permit persons to whom the Software is

# furnished  to do so, subject to the following conditions:

# 

# The above copyright notice and this permission notice shall be included in all

# copies or substantial portions of the Software.

# 

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

# THE SOFTWARE.



ifneq (,$(wildcard ./femto-config.mk))

    include femto-config.mk

endif



USEOPTIONS =$(addprefix use-,$(OPTIONS))

USEOPTIONSX = $(addsuffix .no-gen,$(USEOPTIONS))

NOOPTIONS =$(addprefix no-,$(OPTIONS))

NOOPTIONSX = $(addsuffix .no-gen,$(NOOPTIONS))

DEFAULTOPTIONSX = $(addsuffix .no-gen,$(DEFAULTOPTIONS))

SUBCONF =$(addsuffix .config,$(SUBCONFIG))

CONFIGVARS = $(addprefix prg_,$(PROGRAMS)) \

			  $(addprefix path_,$(PROGRAMS)) \

			  $(addprefix fn_,$(FUNCTIONS)) \

			  $(addprefix lib_,$(LIBS)) \

			  $(addprefix use_,$(OPTIONS)) \

			  $(ADDITIONALVARS)

	



$(PROGRAMS):

	@echo "Looking for program : $@ ..."

	@if which $@ 2> /dev/null; then \

		echo prg_$@=1 >> femto-config.mk; \

		echo path_$@=`which $@` >> femto-config.mk; \

		echo "	found"; \

	else \

		echo "	none"; \

		echo prg_$@=0 >> femto-config.mk; \

		echo path_$@=0 >> femto-config.mk; \

	fi;

	

$(LIBS):

	@echo "Looking for lib : $@ ..."

	@echo "int main() { return 0;}" > config.c

	@if $(CC) config.c $(CFLAGS) $(LDFLAGS) -l$@ -O0 2> /dev/null;	then \

		echo "lib_$@ = 1" >>  femto-config.mk; \

		echo "	found"; \

	else \

		echo "	none"; \

		echo "lib_$@ = 0" >>  femto-config.mk; \

	fi;

	

$(FUNCTIONS):

	@echo "Looking for : $@ ..."

	@sed -e 's,[@]fn[@],$@,g' -e 's,[@]fnp[@],$(shell echo $@ | sed -e 's,/,_,g' -e 's,[.],_,g'),g'< config.c.in > config.c

	@if $(CC) config.c $(CFLAGS) $(LDFLAGS) -O0 2> /dev/null; then \

		echo "fn_$@ = 1" >>  femto-config.mk; \

		echo "	found"; \

	else \

		echo "fn_$@ = 0" >>  femto-config.mk; \

		echo "	none"; \

	fi; 



$(USEOPTIONS):

	@echo "$(subst use-,use_,$@)=1" >> femto-config.mk

	$(MAKE) config.h

	

$(NOOPTIONS): 

	@echo "$(subst no-,use_,$@)=0" >> femto-config.mk

	$(MAKE) config.h

	

$(USEOPTIONSX):

	@echo "$(subst use-,use_,$(basename $@))=1" >> femto-config.mk

	

$(NOOPTIONSX):

	@echo "$(subst no-,use_,$(basename $@))=0" >> femto-config.mk



localmk:

	@echo Removing femto-config.mk

	@echo "" > femto-config.mk;	

	

$(SUBCONF):

	$(MAKE) -C $(basename $@) config

	

config: localmk $(PROGRAMS) $(LIBS) $(FUNCTIONS) $(DEFAULTOPTIONSX) $(SUBCONF)

	$(MAKE) config.h

	

config.h: femto-subst

	./femto-subst < config.h.in > config.h



femto-subst: femto-config.mk

	echo \#!/bin/sh > femto-subst

	echo sed $(foreach v,$(CONFIGVARS),-e 's,[@]$(v)[@],$($(v)),g') >> femto-subst

	chmod +x femto-subst

	

.PHONY: config config.h localmk $(SUBCONF) $(FUNCTIONS) $(PROGRAMS) $(LIBS) \

	$(NOOPTIONS) $(NOOPTIONSX) $(USEOPTIONS) $(USEOPTIONSX) femto-subst