Incorrect processor define on Apple M1

Hello,

we do have some issues on cppTango, which uses omniORB, with obvious
crashes on Apple M1.

The problem seems to be that the omniORB pkg-config files use the wrong
processor defines.

configure.ac has:

####
case "$host" in
  i?86-*)   proc_name="x86Processor";     proc_def="__x86__";;
  x86_64-*) proc_name="x8664Processor";   proc_def="__x86_64__";;
  sparc-*)  proc_name="SparcProcessor";   proc_def="__sparc__";;
  alpha*)   proc_name="AlphaProcessor";   proc_def="__alpha__";;
  m68k-*)   proc_name="m68kProcessor";    proc_def="__m68k__";;
  mips*)    proc_name="IndigoProcessor";  proc_def="__mips__";;
  arm-*)    proc_name="ArmProcessor";     proc_def="__arm__";;
  s390-*)   proc_name="s390Processor";    proc_def="__s390__";;
  ia64-*)   proc_name="ia64Processor";    proc_def="__ia64__";;
  hppa*)    proc_name="HppaProcessor";    proc_def="__hppa__";;
  powerpc*) proc_name="PowerPCProcessor"; proc_def="__powerpc__";;
esac

AC_SUBST(PROCESSOR_NAME, $proc_name)
AC_SUBST(PROCESSOR_DEFINE, $proc_def)
####

and that gives

PROCESSOR_DEFINE='__arm__'
PROCESSOR_NAME='ArmProcessor'

IMHO __arm__ is wrong here according to [1] and

clang -dM -E - < /dev/null | grep __arm
#define __arm64 1
#define __arm64__ 1

Does that make sense?

Thanks,
Thomas

[1]:
https://opensource.apple.com/source/WTF/WTF-7601.1.46.42/wtf/Platform.h.auto.html

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