## simple autoconf system for GNU make## (c) 2002-2004 Gerd Knorr <kraxel@bytesex.org>## credits for creating this one go to the autotools people because# they managed it to annoy lots of developers and users (including# me) with version incompatibilities.## This file is public domain.  No warranty.  If it breaks you keep# both pieces.########################################################################## verbose yes/noverbose		?= no# some stuff used by the testsifneq ($(verbose),no)  # verbose (for debug)  ac_init	= echo "checking $(1) ... " >&2; rc=no  ac_b_cmd	= echo "run: $(1)" >&2; $(1) >/dev/null && rc=yes  ac_s_cmd	= echo "run: $(1)" >&2; rc=`$(1)`  ac_fini	= echo "... result is $${rc}" >&2; echo >&2; echo "$${rc}"else  # normal  ac_init	= echo -n "checking $(1) ... " >&2; rc=no  ac_b_cmd	= $(1) >/dev/null 2>&1 && rc=yes  ac_s_cmd	= rc=`$(1) 2>/dev/null`  ac_fini	= echo "$${rc}" >&2; echo "$${rc}"endif# some helpers to build cflags and related variablesac_def_cflags_1 = $(if $(filter yes,$($(1))),-D$(1))ac_lib_cflags	= $(foreach lib,$(1),$(call ac_def_cflags_1,HAVE_LIB$(lib)))ac_inc_cflags	= $(foreach inc,$(1),$(call ac_def_cflags_1,HAVE_$(inc)))ac_lib_mkvar_1	= $(if $(filter yes,$(HAVE_LIB$(1))),$($(1)_$(2)))ac_lib_mkvar	= $(foreach lib,$(1),$(call ac_lib_mkvar_1,$(lib),$(2)))######################################################################### the tests ...# get unameac_uname = $(shell \	$(call ac_init,for system);\	$(call ac_s_cmd,uname -s | tr 'A-Z' 'a-z');\	$(call ac_fini))# check for some header file# args: header fileac_header = $(shell \	$(call ac_init,for $(1));\	$(call ac_b_cmd,echo '\#include <$(1)>' |\		$(CC) $(CFLAGS) -E -);\	$(call ac_fini))# check for some function# args: function [, additional libs ]ac_func = $(shell \	$(call ac_init,for $(1));\	echo 'void $(1)(void); int main(void) {$(1)();return 0;}' \		> __actest.c;\	$(call ac_b_cmd,$(CC) $(CFLAGS) $(LDFLAGS) -o \		__actest __actest.c $(2));\	rm -f __actest __actest.c;\	$(call ac_fini))# check for some library# args: function, library [, additional libs ]ac_lib = $(shell \	$(call ac_init,for $(1) in $(2));\	echo 'void $(1)(void); int main(void) {$(1)();return 0;}' \		> __actest.c;\	$(call ac_b_cmd,$(CC) $(CFLAGS) $(LDFLAGS) -o \		__actest __actest.c -l$(2) $(3));\	rm -f __actest __actest.c;\	$(call ac_fini))# check if some compiler flag works# args: compiler flagac_cflag = $(shell \	$(call ac_init,if $(CC) supports $(1));\	echo 'int main() {return 0;}' > __actest.c;\	$(call ac_b_cmd,$(CC) $(CFLAGS) $(1) $(LDFLAGS) -o \		__actest __actest.c);\	rm -f __actest __actest.c;\	$(call ac_fini))# check for some binary# args: binary nameac_binary = $(shell \	$(call ac_init,for $(1));\	$(call ac_s_cmd,which $(1));\	bin="$$rc";rc="no";\	$(call ac_b_cmd,test -x "$$$$bin");\	$(call ac_fini))# check if lib64 is usedac_lib64 = $(shell \	$(call ac_init,for libdir name);\	$(call ac_s_cmd,$(CC) -print-search-dirs | grep -q lib64 &&\		echo "lib64" || echo "lib");\	$(call ac_fini))# check for x11 ressource dir prefixac_resdir = $(shell \	$(call ac_init,for X11 app-defaults prefix);\	$(call ac_s_cmd, test -d /etc/X11/app-defaults &&\		echo "/etc/X11" || echo "/usr/X11R6/lib/X11");\	$(call ac_fini))######################################################################### build Make.configdefine newlineendefmake-config-q	= $(subst $(newline),\n,$(make-config))ifeq ($(filter config,$(MAKECMDGOALS)),config).PHONY: Make.config  LIB := $(call ac_lib64)else  LIB ?= $(call ac_lib64)  LIB := $(LIB)endif.PHONY: configconfig: Make.config	@trueMake.config: $(srcdir)/GNUmakefile	@echo -e "$(make-config-q)" > $@	@echo	@echo "Make.config written, edit if needed"	@echo