configure: fix elftest when warnings enabled

If compile testing with -W then elftest.c would fail because
of unused variables.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/configure b/configure
index 6c431c31..88cbdb82 100755
--- a/configure
+++ b/configure
@@ -264,8 +264,8 @@ check_elf()
 #include <gelf.h>
 int main(void)
 {
-	Elf_Scn *scn;
-	GElf_Shdr shdr;
+	Elf_Scn *scn __attribute__((__unused__));
+	GElf_Shdr shdr  __attribute__((__unused__));;
 	return elf_version(EV_CURRENT);
 }
 EOF