configure: Fix test with -Werror=implicit-function-declaration
authorDaniel Stenberg <daniel@haxx.se>
Thu, 14 Nov 2013 02:58:25 +0000 (18:58 -0800)
committerDaniel Stenberg <daniel@haxx.se>
Thu, 14 Nov 2013 03:00:22 +0000 (19:00 -0800)
commit1f0616ea1a89606c6fec7a0855dda12ef5c7a9be
treefead2ce82a212835b3e0eeb9be59ba792433cf4a
parent55250d2d02a4b27838ff7887cf370bb8ca10783b
configure: Fix test with -Werror=implicit-function-declaration

The ipv6 auto-detect test in configure returns a false negative when
CFLAGS contains -Werror=implicit-function-declaration. (I have been
using this flag to detect code issues that would result in SEGVs on
x86_64-cygwin.)

Patch-by: Yaakov Selkowitz
Bug: http://curl.haxx.se/bug/view.cgi?id=1304
configure.ac