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