[backfire] backport r27648
[openwrt-10.03/.git] / 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