Re: powerpc*le-linux support

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