On 24 Apr 2016 00:46, Leno Hou wrote:
>    3) But when I set CHOST="powerpc64le-unkown-linux-gnu" in Gentoo and
> execute aclocal, automake, libtoolize --copy --force, autoconf. When I
> glance in the latest m4/libtool.m4 :

i took another look at this patch.  it isn't making sense to me, and your
commit message doesn't have an explanation as to why you need it.  the only
thing you've written is "i looked at the file, and it looks incorrect".

do you have a build failure/log somewhere to share ?

> if AC_TRY_EVAL(ac_compile); then
>    case `/usr/bin/file conftest.o` in
>      *32-bit*)
>        case $host in
> ...
>          powerpc64le-*linux*)
>            LD="${LD-ld} -m elf32lppclinux"
>            ;;
>          powerpc64-*linux*)
>            LD="${LD-ld} -m elf32ppclinux"
>            ;;
> ...
>      *64-bit*)
>        case $host in
> ...
>          powerpcle-*linux*)
>            LD="${LD-ld} -m elf64lppc"
>            ;;
>          powerpc-*linux*)
>            LD="${LD-ld} -m elf64ppc"
>            ;;
> ...
> 
> seems linked to $LD='$LD-ld -m elf64ppc' and failed to compile packages.

this code is really for multilib situations.  it's only needed when you want
to compile for a diff ABI than the toolchain is defaulting to.

so if --host=powerpc64le-linux-gnu, it should produce 64-bit binaries, and
libtool doesn't have to do anything.  that's why powerpc64 isn't listed in
the 64-bit section.

adding it here would only matter if your powerpc64le-linux-gnu is producing
32-bit binaries by default, and that doesn't make sense.  and as you can
see from the arch list in this section, no other target does this.
-mike