include/host.mk

   1 #
   2 # Copyright (C) 2007-2015 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 $(TMP_DIR)/.host.mk
  11 endif
  12
  13 ifneq ($(__host_inc),1)
  14 __host_inc:=1
  15
  16 try-run = $(shell set -e; \
  17         TMP_F="$(TMP_DIR)/try-run.$$$$.tmp"; \
  18         if ($(1)) >/dev/null 2>&1; then echo "$(2)"; else echo "$(3)"; fi; \
  19         rm -f "$$TMP_F"; \
  20 )
  21
  22 host-cc-option = $(call try-run, \
  23         $(HOSTCC) $(HOST_CFLAGS) $(1) -c -xc /dev/null -o "$$TMP_F",$(1),$(2) \
  24 )
  25
  26 .PRECIOUS: $(TMP_DIR)/.host.mk
  27 $(TMP_DIR)/.host.mk: $(TOPDIR)/include/host.mk
  28         @mkdir -p $(TMP_DIR)
  29         @( \
  30                 HOST_OS=`uname`; \
  31                 case "$$HOST_OS" in \
  32                         Linux) HOST_ARCH=`uname -m`;; \
  33                         Darwin) HOST_ARCH=`uname -m`;; \
  34                         *) HOST_ARCH=`uname -p`;; \
  35                 esac; \
  36                 GNU_HOST_NAME=`gcc -dumpmachine`; \
  37                 [ -z "$$GNU_HOST_NAME" -o "$$HOST_OS" = "Darwin" ] && \
  38                         GNU_HOST_NAME=`$(TOPDIR)/scripts/config.guess`; \
  39                 echo "HOST_OS:=$$HOST_OS" > $@; \
  40                 echo "HOST_ARCH:=$$HOST_ARCH" >> $@; \
  41                 echo "GNU_HOST_NAME:=$$GNU_HOST_NAME" >> $@; \
  42                 if gfind -L /dev/null || find -L /dev/null; then \
  43                         echo "FIND_L=find -L \$$(1)" >> $@; \
  44                 else \
  45                         echo "FIND_L=find \$$(1) -follow" >> $@; \
  46                 fi \
  47         ) >/dev/null 2>/dev/null
  48
  49 endif