bug#36762: libtool.m4 bug (spaces detection in compiler's output after -L/-R)

[Igor Rondarev]

Hi!

There is probaby a bug in 'm4/libtool.m4' that prevents correct 
detection of all the library paths provided by compiler (comparison is 
always FALSE). Here is a small patch:

> diff -ruN orig/m4/libtool.m4 patched/m4/libtool.m4
> --- orig/m4/libtool.m4   2019-04-18 16:57:12.487507441 +0300
> +++ patched/m4/libtool.m4        2019-04-18 16:57:29.503424063 +0300
> @@ -7537,8 +7537,8 @@
>      -L* | -R* | -l*)
>         # Some compilers place space between "-{L,R}" and the path.
>         # Remove the space.
> -       if test x-L = "$p" ||
> -          test x-R = "$p"; then
> +       if test x-L = "x$p" ||
> +          test x-R = "x$p"; then
>          prev=$p
>          continue
>         fi
Regards,
Igor.