[Bug libstdc++/58638] libstdc++ builds as non-PIC when --with-pic is specified

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58638

--- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Alec Ari from comment #11)
> This fix worked for me:
> 
> --- a/libstdc++-v3/configure.ac
> +++ b/libstdc++-v3/configure.ac
> @@ -121,8 +121,8 @@ if test "$enable_shared" = yes; then
>    glibcxx_compiler_shared_flag="-D_GLIBCXX_SHARED"
>  
>  else
> -  glibcxx_lt_pic_flag=
> -  glibcxx_compiler_pic_flag=
> +  glibcxx_lt_pic_flag="-prefer-pic"
> +  glibcxx_compiler_pic_flag="$lt_prog_compiler_pic_CXX"
>    glibcxx_compiler_shared_flag=
>  fi
> 
> (no elif / no else if)

But this means always PIC, doesn't it? Even if you build with --disable-shared
and --without-pic. Surely that's not right? Why is this better than comment 9?