diff options
| author | nico <nico@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2010-05-02 17:22:01 +0000 |
|---|---|---|
| committer | nico <nico@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2010-05-02 17:22:01 +0000 |
| commit | cb2f53e0b7314fbf6aeee8176c9fc3fe94893e42 (patch) | |
| tree | 26a9cd522138a8c7d61c2f1abdc617cde88f502d /include | |
| parent | 6b41b93bc5392ff632b68700d32f226f4dbc4c6f (diff) | |
buildsystem: add a macro to test options supported by the host compiler
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21304 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'include')
| -rw-r--r-- | include/host.mk | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/include/host.mk b/include/host.mk index b93ab8d53..02365d9ea 100644 --- 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. @@ -14,6 +14,17 @@ 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) |