xen/Makefile: quote HOSTCC and HOSTCXX args

In some cross-compilation environments, the CC/CXX variables may
expand out to more than one argument (to include things
like --sysroot=...).  Quote these to safely pass along.

Signed-off-by: Chris Patterson <pattersonc@ainfosec.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Release-acked-by: Wei Liu <wei.liu2@citrix.com>

diff --git a/xen/Makefile b/xen/Makefile
index 0d5f240edbb3f3c6af91f846ccc46097811b9284..b59f95d1e9c5963a5b50a0ebc5f851e45916577a 100644 (file)
--- a/xen/Makefile
+++ b/xen/Makefile
@@ -246,14 +246,14 @@ kconfig := silentoldconfig oldconfig config menuconfig defconfig \
        randconfig
 .PHONY: $(kconfig)
 $(kconfig):
-       $(MAKE) -f $(BASEDIR)/tools/kconfig/Makefile.kconfig ARCH=$(ARCH) SRCARCH=$(SRCARCH) HOSTCC=$(HOSTCC) HOSTCXX=$(HOSTCXX) $@
+       $(MAKE) -f $(BASEDIR)/tools/kconfig/Makefile.kconfig ARCH=$(ARCH) SRCARCH=$(SRCARCH) HOSTCC="$(HOSTCC)" HOSTCXX="$(HOSTCXX)" $@
 
 include/config/%.conf: include/config/auto.conf.cmd $(KCONFIG_CONFIG)
-       $(MAKE) -f $(BASEDIR)/tools/kconfig/Makefile.kconfig ARCH=$(ARCH) SRCARCH=$(SRCARCH) HOSTCC=$(HOSTCC) HOSTCXX=$(HOSTCXX) silentoldconfig
+       $(MAKE) -f $(BASEDIR)/tools/kconfig/Makefile.kconfig ARCH=$(ARCH) SRCARCH=$(SRCARCH) HOSTCC="$(HOSTCC)" HOSTCXX="$(HOSTCXX)" silentoldconfig
 
 # Allow people to just run `make` as before and not force them to configure
 $(KCONFIG_CONFIG):
-       $(MAKE) -f $(BASEDIR)/tools/kconfig/Makefile.kconfig ARCH=$(ARCH) SRCARCH=$(SRCARCH) HOSTCC=$(HOSTCC) HOSTCXX=$(HOSTCXX) defconfig
+       $(MAKE) -f $(BASEDIR)/tools/kconfig/Makefile.kconfig ARCH=$(ARCH) SRCARCH=$(SRCARCH) HOSTCC="$(HOSTCC)" HOSTCXX="$(HOSTCXX)" defconfig
 
 # Break the dependency chain for the first run
 include/config/auto.conf.cmd: ;