[PATCH] configure: fix parameter expansion of --cross-cc-cflags options

[matheus . ferst]

From: Matheus Ferst <matheus.fe...@eldorado.org.br>

Without this fix, any use of --cross-cc-cflags-* causes a message like:
$ ../configure --cross-cc-ppc64le=clang --cross-cc-cflags-ppc64le="-target 
powerpc64le-unknown-linux-gnu -sysroot ..."
../configure: 1: eval: cross_cc_cflags_--cross-cc-cflags-ppc64le=-target: not 
found
../configure: 3816: export: cross_cc_cflags_--cross-cc-cflags-ppc64le: bad 
variable name

Signed-off-by: Matheus Ferst <matheus.fe...@eldorado.org.br>
---
 configure | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure b/configure
index e1a31fb332..4735c1bffc 100755
--- a/configure
+++ b/configure
@@ -402,7 +402,7 @@ for opt do
   ;;
   --cross-cc-*[!a-zA-Z0-9_-]*=*) error_exit "Passed bad --cross-cc-FOO option"
   ;;
-  --cross-cc-cflags-*) cc_arch=${opt#--cross-cc-flags-}; cc_arch=${cc_arch%%=*}
+  --cross-cc-cflags-*) cc_arch=${opt#--cross-cc-cflags-}; 
cc_arch=${cc_arch%%=*}
                       eval "cross_cc_cflags_${cc_arch}=\$optarg"
                       cross_cc_vars="$cross_cc_vars cross_cc_cflags_${cc_arch}"
   ;;
-- 
2.25.1