-$(TOPDIR)/.host.mk: $(INCLUDE_DIR)/host.mk
- echo "HOST_OS:=`uname`" > $@
- echo "HOST_ARCH:=` \
- $(HOSTCC) -dumpmachine | sed -e s'/-.*//' \
- -e 's/sparc.*/sparc/' \
- -e 's/arm.*/arm/' \
- -e 's/m68k.*/m68k/' \
- -e 's/ppc/powerpc/' \
- -e 's/v850.*/v850/' \
- -e 's/sh[234]/sh/' \
- -e 's/mips-.*/mips/' \
- -e 's/mipsel-.*/mipsel/' \
- -e 's/cris.*/cris/' \
- -e 's/i[3-9]86/i386/'`" >> $@
- echo "GNU_HOST_NAME:=`$(HOSTCC) -dumpmachine`" >> $@
+export TAR FIND
+
+ifneq ($(__host_inc),1)
+__host_inc:=1
+
+try-run = $(shell set -e; \
+ TMP_F="$(TMP_DIR)/try-run.$$$$.tmp"; \
+ if ($(1)) >/dev/null 2>&1; then echo "$(2)"; else echo "$(3)"; fi; \
+ rm -f "$$TMP_F"; \
+)
+
+host-cc-option = $(call try-run, \
+ $(HOSTCC) $(HOST_CFLAGS) $(1) -c -xc /dev/null -o "$$TMP_F",$(1),$(2) \
+)
+
+.PRECIOUS: $(TMP_DIR)/.host.mk
+$(TMP_DIR)/.host.mk: $(TOPDIR)/include/host.mk
+ @mkdir -p $(TMP_DIR)
+ @( \
+ HOST_OS=`uname`; \
+ case "$$HOST_OS" in \
+ Linux) HOST_ARCH=`uname -m`;; \
+ Darwin) HOST_ARCH=`uname -m`;; \
+ *) HOST_ARCH=`uname -p`;; \
+ esac; \
+ GNU_HOST_NAME=`gcc -dumpmachine`; \
+ [ -z "$$GNU_HOST_NAME" -o "$$HOST_OS" = "Darwin" ] && \
+ GNU_HOST_NAME=`$(TOPDIR)/scripts/config.guess`; \
+ echo "HOST_OS:=$$HOST_OS" > $@; \
+ echo "HOST_ARCH:=$$HOST_ARCH" >> $@; \
+ echo "GNU_HOST_NAME:=$$GNU_HOST_NAME" >> $@; \
+ TAR=`which gtar 2>/dev/null`; \
+ [ -n "$$TAR" -a -x "$$TAR" ] || TAR=`which gnutar 2>/dev/null`; \
+ [ -n "$$TAR" -a -x "$$TAR" ] || TAR=`which tar 2>/dev/null`; \
+ echo "TAR:=$$TAR" >> $@; \
+ FIND=`which gfind 2>/dev/null`; \
+ [ -n "$$FIND" -a -x "$$FIND" ] || FIND=`which find 2>/dev/null`; \
+ echo "FIND:=$$FIND" >> $@; \
+ echo "BASH:=$(shell which bash)" >> $@; \
+ if $$FIND -L /tmp -maxdepth 0 >/dev/null 2>/dev/null; then \
+ echo "FIND_L=$$FIND -L \$$(1)" >>$@; \
+ else \
+ echo "FIND_L=$$FIND \$$(1) -follow" >> $@; \
+ fi; \
+ if xargs --help 2>&1 | grep 'gnu.org' >/dev/null; then \
+ echo 'XARGS:=xargs -r' >> $@; \
+ else \
+ echo 'XARGS:=xargs' >> $@; \
+ fi; \
+ PATCH=`which gpatch 2>/dev/null`; \
+ [ -n "$$PATCH" -a -x "$$PATCH" ] || PATCH=`which patch 2>/dev/null`; \
+ echo "PATCH:=$$PATCH" >> $@; \
+ )
+
+endif