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#
# simple autoconf system for GNU make
#
# (c) 2002-2006 Gerd Hoffmann <kraxel@suse.de>
#
# 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/no
verbose ?= no
# some stuff used by the tests
ifneq ($(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 variables
ac_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 uname
ac_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 file
ac_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 flag
ac_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 name
ac_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 used
ac_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 prefix
ac_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))
# check if package is installed, via pkg-config
# args: pkg name
ac_pkg_config = $(shell \
$(call ac_init,for $(1) (using pkg-config));\
$(call ac_b_cmd, pkg-config $(1));\
$(call ac_fini))
########################################################################
# build Make.config
define newline
endef
make-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: config
config: Make.config
@true
Make.config: $(srcdir)/GNUmakefile
@echo -e "$(make-config-q)" > $@
@echo
@echo "Make.config written, edit if needed"
@echo
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