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| author | Nicolas Thill <nico@openwrt.org> | 2010-05-02 17:22:01 +0000 |
|---|---|---|
| committer | Nicolas Thill <nico@openwrt.org> | 2010-05-02 17:22:01 +0000 |
| commit | 4ec517b27c9e5e0fee8434bbac387706964e53a3 (patch) | |
| tree | 26a9cd522138a8c7d61c2f1abdc617cde88f502d | |
| parent | 8c0162fb0c7f63ae2db11d652d27ea41178587d5 (diff) | |
| download | upstream-4ec517b27c9e5e0fee8434bbac387706964e53a3.tar.gz upstream-4ec517b27c9e5e0fee8434bbac387706964e53a3.tar.bz2 upstream-4ec517b27c9e5e0fee8434bbac387706964e53a3.zip | |
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
| -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 b93ab8d536..02365d9eab 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) |