include/host.mk

   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
   8 TMP_DIR ?= $(TOPDIR)/tmp
   9 ifeq ($(if $(TARGET_BUILD),,$(DUMP)),)
  10   -include $(TMP_DIR)/.host.mk
  11 endif
  12
  13 export TAR FIND
  14
  15 ifneq ($(__host_inc),1)
  16 __host_inc:=1
  17
  18 try-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
  24 host-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                         *) HOST_ARCH=`uname -p`;; \
  36                 esac; \
  37                 GNU_HOST_NAME=`gcc -dumpmachine`; \
  38                 [ -n "$$GNU_HOST_NAME" ] || \
  39                         GNU_HOST_NAME=`$(SCRIPT_DIR)/config.guess`; \
  40                 echo "HOST_OS:=$$HOST_OS" > $@; \
  41                 echo "HOST_ARCH:=$$HOST_ARCH" >> $@; \
  42                 echo "GNU_HOST_NAME:=$$GNU_HOST_NAME" >> $@; \
  43                 TAR=`which gtar 2>/dev/null`; \
  44                 [ -n "$$TAR" -a -x "$$TAR" ] || TAR=`which gnutar 2>/dev/null`; \
  45                 [ -n "$$TAR" -a -x "$$TAR" ] || TAR=`which tar 2>/dev/null`; \
  46                 echo "TAR:=$$TAR" >> $@; \
  47                 FIND=`which gfind 2>/dev/null`; \
  48                 [ -n "$$FIND" -a -x "$$FIND" ] || FIND=`which find 2>/dev/null`; \
  49                 echo "FIND:=$$FIND" >> $@; \
  50                 echo "BASH:=$(shell which bash)" >> $@; \
  51                 if $$FIND -L /tmp -maxdepth 0 >/dev/null 2>/dev/null; then \
  52                         echo "FIND_L=$$FIND -L \$$(1)" >>$@; \
  53                 else \
  54                         echo "FIND_L=$$FIND \$$(1) -follow" >> $@; \
  55                 fi; \
  56                 if xargs --help 2>&1 | grep 'gnu.org' >/dev/null; then \
  57                         echo 'XARGS:=xargs -r' >> $@; \
  58                 else \
  59                         echo 'XARGS:=xargs' >> $@; \
  60                 fi; \
  61         )
  62
  63 endif