Use -z textwarn when linking with -shared until we figure out why 'relocations against non-writable, allocatable sections remain'.

Bug #23759 & Bug #35419

configure.in

@@ -1525,7 +1525,7 @@ dnl the qsort routine under solaris is faulty
         AC_MSG_RESULT([$_res])
     else
        ASFLAGS="$ASFLAGS -fPIC"
-       DSO_LDOPTS='-shared -h $@'
+       DSO_LDOPTS='-shared -h $@ -Wl,-z -Wl,textwarn'
        _WARNINGS_CFLAGS=''
        _WARNINGS_CXXFLAGS=''
        if test "$OS_RELEASE" = "5.3"; then