Re: powerpc*le-linux support

[Alan Modra]

On Thu, Jun 06, 2013 at 11:31:34AM +0930, Alan Modra wrote:
> This adds support for little-endian powerpc linux, and tidies the
> existing host match for powerpc.  config.sub won't return ppc*-*linux*
> so there isn't much point in matching that.

> -       ppc*-*linux*|powerpc*-*linux*)
> +       powerpcle*)
> +         LD="${LD-ld} -m elf64lppc"
> +         ;;
> +       powerpc*)
>           LD="${LD-ld} -m elf64ppc"
>           ;;

I didn't get that quite right.  'powerpc*' in the above matches too
much, for example when your host is powerpc64-linux and target
powerpc64le-linux you'll get -melf64ppc added to LD.  Since
powerpc64le-linux-ld wants -melf64lppc (or nothing) that will fail.
Revised as follows.

        * m4/libtool.m4 (ld -m flags): Remove non-canonical ppc host match.
        Support little-endian powerpc linux host.

diff --git a/m4/libtool.m4 b/m4/libtool.m4
index d7013c5..501246d 100644
--- a/m4/libtool.m4
+++ b/m4/libtool.m4
@@ -1307,7 +1307,7 @@ ia64-*-hpux*)
   rm -rf conftest*
   ;;
 
-x86_64-*kfreebsd*-gnu|x86_64-*linux*|ppc*-*linux*|powerpc*-*linux*| \
+x86_64-*kfreebsd*-gnu|x86_64-*linux*|powerpc*-*linux*| \
 s390*-*linux*|s390*-*tpf*|sparc*-*linux*)
   # Find out which ABI we are using.
   echo 'int i;' > conftest.$ac_ext
@@ -1328,7 +1328,10 @@ s390*-*linux*|s390*-*tpf*|sparc*-*linux*)
                ;;
            esac
            ;;
-         ppc64-*linux*|powerpc64-*linux*)
+         powerpc64le-*)
+           LD="${LD-ld} -m elf32lppclinux"
+           ;;
+         powerpc64-*)
            LD="${LD-ld} -m elf32ppclinux"
            ;;
          s390x-*linux*)
@@ -1347,7 +1350,10 @@ s390*-*linux*|s390*-*tpf*|sparc*-*linux*)
          x86_64-*linux*)
            LD="${LD-ld} -m elf_x86_64"
            ;;
-         ppc*-*linux*|powerpc*-*linux*)
+         powerpcle-*)
+           LD="${LD-ld} -m elf64lppc"
+           ;;
+         powerpc-*)
            LD="${LD-ld} -m elf64ppc"
            ;;
          s390*-*linux*|s390*-*tpf*)


-- 
Alan Modra
Australia Development Lab, IBM