Use the '-z defs' linker option if supported to better catch undefined
symbols.
diff --git a/configure b/configure
index d4fbe3a..aeb1772 100755
--- a/configure
+++ b/configure
@@ -10234,6 +10234,52 @@
then
LDSHARED="\$(CC) -shared \$(SONAME:%=-Wl,-soname,%)"
LDDLLFLAGS="-Wl,-Bsymbolic"
+ echo "$as_me:$LINENO: checking whether the linker accepts -z defs" >&5
+echo $ECHO_N "checking whether the linker accepts -z defs... $ECHO_C" >&6
+if test "${ac_cv_c_dll_zdefs+set}" = set; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+ ac_wine_try_cflags_saved=$CFLAGS
+CFLAGS="$CFLAGS -fPIC -shared -Wl,-Bsymbolic,-z,defs"
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+#include "confdefs.h"
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+ (eval $ac_link) 2>&5
+ ac_status=$?
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -s conftest$ac_exeext'
+ { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ ac_cv_c_dll_zdefs="yes"
+else
+ echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+ac_cv_c_dll_zdefs="no"
+fi
+rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
+CFLAGS=$ac_wine_try_cflags_saved
+fi
+echo "$as_me:$LINENO: result: $ac_cv_c_dll_zdefs" >&5
+echo "${ECHO_T}$ac_cv_c_dll_zdefs" >&6
+ if test "$ac_cv_c_dll_zdefs" = "yes"
+ then
+ LDDLLFLAGS="$LDDLLFLAGS,-z,defs"
+ fi
else
echo "$as_me:$LINENO: checking whether we can build a UnixWare (Solaris) dll" >&5
echo $ECHO_N "checking whether we can build a UnixWare (Solaris) dll... $ECHO_C" >&6
