Turn off --no-undefined on OpenBSD again. Leave it on everywhere else for now.

configure

@@ -15953,6 +15953,11 @@ fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for linker option --no-undefined" >&5
 $as_echo_n "checking for linker option --no-undefined... " >&6; }
 have_no_undefined=no
+case "$host" in
+        *-*-openbsd*)
+        ;;
+
+    *)
         save_LDFLAGS="$LDFLAGS"
         LDFLAGS="$LDFLAGS -Wl,--no-undefined"
         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -15977,6 +15982,8 @@ fi
 rm -f core conftest.err conftest.$ac_objext \
     conftest$ac_exeext conftest.$ac_ext
         LDFLAGS="$save_LDFLAGS"
+        ;;
+esac
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $have_no_undefined" >&5
 $as_echo "$have_no_undefined" >&6; }
 

configure.in

@@ -206,6 +206,12 @@ fi
 
 AC_MSG_CHECKING(for linker option --no-undefined)
 have_no_undefined=no
+case "$host" in
+    dnl Skip this on platforms where it is just simply busted.
+    *-*-openbsd*)
+        ;;
+
+    *)
         save_LDFLAGS="$LDFLAGS"
         LDFLAGS="$LDFLAGS -Wl,--no-undefined"
         AC_TRY_LINK([
@@ -215,6 +221,8 @@ have_no_undefined=yes
         EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,--no-undefined"
         ])
         LDFLAGS="$save_LDFLAGS"
+        ;;
+esac
 AC_MSG_RESULT($have_no_undefined)
 
 dnl See whether we are allowed to use the system C library