Apple M1 compilation issue.

[Karel Gardas]

Hello,

RTEMS community is using MPC as a part of GNU C compiler. Recently we 
have been hit by an issue of compiling GNU C compiler toolchain on the 
Apple M1 hardware. The issue is easily fixable by the patch below, but 
RTEMS community refuses to include the fix without a clear sign that 
upstream project (you) were contacted and asked either for patch 
acceptance or fixing the issue.

Could you be so kind and in next release use latest available autotools 
to generate configure script and associated files? This way, problematic 
config.sub file is generated with the proper support for Apple M1 
hardware and everything should be working again.

Thanks!
Karel Gardas



--- mpc/build-aux/config.sub.orig       2022-05-11 09:20:51.000000000 +0200
+++ mpc/build-aux/config.sub    2022-05-11 09:23:47.000000000 +0200
@@ -916,6 +916,10 @@
                 cpu=sparc
                 vendor=`echo "$basic_machine" | sed 's/-.*//'`
                 ;;
+       arm64-*)
+               cpu=aarch64
+               vendor=`echo "$basic_machine" | sed 's/-.*//'`
+               ;;

         *-*)
                 # shellcheck disable=SC2162