#!/bin/sh
#
# Copyright (c) 2012, 2025, Oracle and/or its affiliates. All rights reserved.
# Copyright (c) 2021, Azul Systems, Inc. All rights reserved.
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
#
# This code is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 2 only, as
# published by the Free Software Foundation.
#
# This code is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
# version 2 for more details (a copy is included in the LICENSE file that
# accompanied this code).
#
# You should have received a copy of the GNU General Public License version
# 2 along with this work; if not, write to the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
# or visit www.oracle.com if you need additional information or have any
# questions.
#

# This is a wrapper for the config.guess from autoconf. The latter does not
# properly detect 64 bit systems on all platforms. Instead of patching the
# autoconf system (which might easily get lost in a future update), we wrap it
# and fix the broken property, if needed.

DIR=`dirname $0`
OUT=`. $DIR/autoconf-config.guess 2> /dev/null`

# Handle some cases that autoconf-config.guess is not capable of
if [ "x$OUT" = x ]; then
  if [ `uname -s` = Linux ]; then
    # Test and fix little endian MIPS.
    if [ `uname -m` = mipsel ]; then
      OUT=mipsel-unknown-linux-gnu
    fi
  # Test and fix cygwin machine arch .x86_64
  elif [[ `uname -s` = CYGWIN* ]]; then
    if [ `uname -m` = ".x86_64" ]; then
      OUT=x86_64-unknown-cygwin
    fi
  fi

  if [ "x$OUT" = x ]; then
    # Run autoconf-config.guess again to get the error message.
    . $DIR/autoconf-config.guess > /dev/null
  else
    printf "guessed by custom config.guess... " >&2
  fi
fi

# Test and fix cygwin/msys CPUs
echo $OUT | grep -e "-pc-cygwin" > /dev/null 2> /dev/null
if test $? != 0; then
  echo $OUT | grep -e "-pc-mingw" > /dev/null 2> /dev/null
fi
if test $? = 0; then
  case `echo $PROCESSOR_IDENTIFIER | cut -f1 -d' '` in
    intel64|Intel64|INTEL64|em64t|EM64T|amd64|AMD64|8664|x86_64)
      REAL_CPU=x86_64
      OUT=$REAL_CPU`echo $OUT | sed -e 's/[^-]*//'`
      ;;
    ARMv8)
      REAL_CPU=aarch64
      OUT=$REAL_CPU`echo $OUT | sed -e 's/[^-]*//'`
      ;;
  esac
fi

# Test and fix wsl
echo $OUT | grep '\(unknown\|pc\)-linux-gnu' > /dev/null 2> /dev/null
if test $? = 0; then
  uname -r | grep -i microsoft > /dev/null 2> /dev/null
  if test $? = 0; then
    OUT=`echo $OUT | sed -e 's/\(unknown\|pc\)-linux-gnu/pc-wsl/'`
  fi
fi

# Test and fix architecture string on AIX
# On AIX 'config.guess' returns 'powerpc' as architecture but 'powerpc' is
# implicitly handled as 32-bit architecture in 'platform.m4' so we check
# for the kernel mode rewrite it to 'powerpc64' if we'Re running in 64-bit mode.
# The check could also be done with `/usr/sbin/prtconf | grep "Kernel Type" | grep "64-bit"`
echo $OUT | grep powerpc-ibm-aix > /dev/null 2> /dev/null
if test $? = 0; then
  if [ -x /bin/getconf ] ; then
    KERNEL_BITMODE=`getconf KERNEL_BITMODE`
    if  [ "$KERNEL_BITMODE" = "32" ]; then
      KERNEL_BITMODE=""
    fi
  fi
  OUT=powerpc$KERNEL_BITMODE`echo $OUT | sed -e 's/[^-]*//'`
fi

# Test and fix cpu on Macosx when C preprocessor is not on the path
echo $OUT | grep i386-apple-darwin > /dev/null 2> /dev/null
if test $? = 0; then
  REAL_CPU=`uname -m`
  OUT=$REAL_CPU`echo $OUT | sed -e 's/[^-]*//'`
fi

echo $OUT