1# 
2# Copyright (C) 2007-2010 OpenWrt.org
3#
4# This is free software, licensed under the GNU General Public License v2.
5# See /LICENSE for more information.
6#
7
8TMP_DIR ?= $(TOPDIR)/tmp
9ifeq ($(if $(TARGET_BUILD),,$(DUMP)),)
10  -include $(TMP_DIR)/.host.mk
11endif
12
13export TAR FIND
14
15ifneq ($(__host_inc),1)
16__host_inc:=1
17
18try-run = $(shell set -e; \
19	TMP_F="$(TMP_DIR)/try-run.$$$$.tmp"; \
20	if ($(1)) >/dev/null 2>&1; then echo "$(2)"; else echo "$(3)"; fi; \
21	rm -f "$$TMP_F"; \
22)
23
24host-cc-option = $(call try-run, \
25	$(HOSTCC) $(HOST_CFLAGS) $(1) -c -xc /dev/null -o "$$TMP_F",$(1),$(2) \
26)
27
28.PRECIOUS: $(TMP_DIR)/.host.mk
29$(TMP_DIR)/.host.mk: $(TOPDIR)/include/host.mk
30	@mkdir -p $(TMP_DIR)
31	@( \
32		HOST_OS=`uname`; \
33		case "$$HOST_OS" in \
34			Linux) HOST_ARCH=`uname -m`;; \
35			Darwin) HOST_ARCH=`uname -m`;; \
36			*) HOST_ARCH=`uname -p`;; \
37		esac; \
38		GNU_HOST_NAME=`gcc -dumpmachine`; \
39		[ -z "$$GNU_HOST_NAME" -o "$$HOST_OS" = "Darwin" ] && \
40			GNU_HOST_NAME=`$(TOPDIR)/scripts/config.guess`; \
41		echo "HOST_OS:=$$HOST_OS" > $@; \
42		echo "HOST_ARCH:=$$HOST_ARCH" >> $@; \
43		echo "GNU_HOST_NAME:=$$GNU_HOST_NAME" >> $@; \
44		TAR=`which gtar 2>/dev/null`; \
45		[ -n "$$TAR" -a -x "$$TAR" ] || TAR=`which gnutar 2>/dev/null`; \
46		[ -n "$$TAR" -a -x "$$TAR" ] || TAR=`which tar 2>/dev/null`; \
47		echo "TAR:=$$TAR" >> $@; \
48		FIND=`which gfind 2>/dev/null`; \
49		[ -n "$$FIND" -a -x "$$FIND" ] || FIND=`which find 2>/dev/null`; \
50		echo "FIND:=$$FIND" >> $@; \
51		echo "BASH:=$(shell which bash)" >> $@; \
52		if $$FIND -L /tmp -maxdepth 0 >/dev/null 2>/dev/null; then \
53			echo "FIND_L=$$FIND -L \$$(1)" >>$@; \
54		else \
55			echo "FIND_L=$$FIND \$$(1) -follow" >> $@; \
56		fi; \
57		if xargs --help 2>&1 | grep 'gnu.org' >/dev/null; then \
58			echo 'XARGS:=xargs -r' >> $@; \
59		else \
60			echo 'XARGS:=xargs' >> $@; \
61		fi; \
62		PATCH=`which gpatch 2>/dev/null`; \
63		[ -n "$$PATCH" -a -x "$$PATCH" ] || PATCH=`which patch 2>/dev/null`; \
64		echo "PATCH:=$$PATCH" >> $@; \
65	)
66
67endif
68