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buildsystem: add a macro to test options supported by the host compiler
author
Nicolas Thill
<nico@openwrt.org>
Sun, 2 May 2010 17:22:01 +0000
(17:22 +0000)
committer
Nicolas Thill
<nico@openwrt.org>
Sun, 2 May 2010 17:22:01 +0000
(17:22 +0000)
SVN-Revision: 21304
include/host.mk
patch
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diff --git
a/include/host.mk
b/include/host.mk
index b93ab8d536d2f0df3e973ea271b1c090dca04264..02365d9eabdf074a35c6cccc20eeb9bf8709ffd0 100644
(file)
--- a/
include/host.mk
+++ b/
include/host.mk
@@
-1,5
+1,5
@@
#
#
-# Copyright (C) 2007 OpenWrt.org
+# Copyright (C) 2007
-2010
OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
@@
-14,6
+14,17
@@
export TAR FIND
ifneq ($(__host_inc),1)
__host_inc:=1
ifneq ($(__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)
.PRECIOUS: $(TMP_DIR)/.host.mk
$(TMP_DIR)/.host.mk: $(TOPDIR)/include/host.mk
@mkdir -p $(TMP_DIR)