Root/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
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            *) 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
63endif
64

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