dnl Copyright (C) 1993-2019 Free Software Foundation, Inc.
dnl This file is free software, distributed under the terms of the GNU
dnl General Public License.  As a special exception to the GNU General
dnl Public License, this file may be distributed as part of a program
dnl that contains a configuration script generated by Autoconf, under
dnl the same distribution terms as the rest of that program.

dnl From Bruno Haible, Marcus Daniels, Sam Steingold.

AC_PREREQ([2.69])

dnl Usage:
dnl CL_LINK_CHECK(ECHO-TEXT, CACHE-ID, INCLUDES, FUNCTION-BODY, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND])
AC_DEFUN([CL_LINK_CHECK],
[AC_MSG_CHECKING(for $1)
AC_CACHE_VAL($2,[
AC_LINK_IFELSE([AC_LANG_PROGRAM([[$3]], [[$4]])], [$2=yes], [$2=no])
])
AC_MSG_RESULT([$]$2)
if test [$]$2 = yes; then
  ifelse([$5], , :, [$5])
ifelse([$6], , , [else
  $6
])dnl
fi
])

dnl Expands to the "extern ..." prefix used for system declarations.
dnl AC_LANG_EXTERN()
AC_DEFUN([AC_LANG_EXTERN],
[extern
#ifdef __cplusplus
"C"
#endif
])

AC_DEFUN([CL_CANONICAL_HOST],
[AC_REQUIRE([AC_PROG_CC])
AC_CANONICAL_HOST
])

AC_DEFUN([CL_CANONICAL_HOST_CPU],
[AC_REQUIRE([CL_CANONICAL_HOST])AC_REQUIRE([AC_PROG_CC])
case "$host_cpu" in
changequote(,)dnl
  i[4567]86 )
    host_cpu=i386
    ;;
  alphaev[4-8] | alphaev56 | alphapca5[67] | alphaev6[78] )
    host_cpu=alpha
    ;;
  hppa1.0 | hppa1.1 | hppa2.0* | hppa64 )
    host_cpu=hppa
    ;;
  powerpc )
    host_cpu=rs6000
    ;;
  c1 | c2 | c32 | c34 | c38 | c4 )
    host_cpu=convex
    ;;
  arm* )
    host_cpu=arm
    ;;
changequote([,])dnl
  mips* )
    AC_CACHE_CHECK([for 64-bit MIPS], cl_cv_host_mips64, [
AC_EGREP_CPP(yes,
[#if defined(_MIPS_SZLONG)
#if (_MIPS_SZLONG == 64)
/* We should also check for (_MIPS_SZPTR == 64), but gcc keeps this at 32. */
  yes
#endif
#endif
], cl_cv_host_mips64=yes, cl_cv_host_mips64=no)
])
if test $cl_cv_host_mips64 = yes; then
  host_cpu=mips64
fi
    ;;
dnl UltraSPARCs running Linux have `uname -m` = "sparc64", but the C compiler
dnl still generates 32-bit code.
  sparc | sparc64 )
    AC_CACHE_CHECK([for 64-bit SPARC], cl_cv_host_sparc64, [
AC_EGREP_CPP(yes,
[#if defined(__sparcv9) || defined(__arch64__)
  yes
#endif
], cl_cv_host_sparc64=yes, cl_cv_host_sparc64=no)
])
if test $cl_cv_host_sparc64 = yes; then
  host_cpu=sparc64
else
  host_cpu=sparc
fi
    ;;
dnl MacOS X 10.5 machines on x86_64 platforms have 'uname -m' = "i386" even
dnl if 64-bit programs are fully supported.
dnl AMD64 running Linux have 'uname -m' = "x86_64" even if userland is purely
dnl 32-bit.
  i386 | x86_64 )
    AC_CACHE_CHECK([for 64-bit userland on x86-64], cl_cv_host_x86_64, [
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
[[#if !defined __x86_64__
# error __x86_64__ not defined
#endif
]])
], [cl_cv_host_x86_64=yes], [cl_cv_host_x86_64=no])
])
if test $cl_cv_host_x86_64 = yes; then
  host_cpu=x86_64
else
  host_cpu=i386
fi
  ;;
dnl PowerPC64 is another case where 'uname -m' and userland may disagree.
  powerpc64 )
    AC_CACHE_CHECK([for 64-bit userland on PowerPC64], cl_cv_host_powerpc64, [
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
[[#if !defined __powerpc64__
# error __powerpc64__ not defined
#endif
]])
], [cl_cv_host_powerpc64=yes], [cl_cv_host_powerpc64=no])
])
if test $cl_cv_host_powerpc64 = yes; then
  host_cpu=powerpc64
else
  host_cpu=rs6000
fi
  ;;
esac
dnl was AC_DEFINE_UNQUOTED(__${host_cpu}__) but KAI C++ 3.2d doesn't like this
cat >> confdefs.h <<EOF
#ifndef __${host_cpu}__
#define __${host_cpu}__ 1
#endif
EOF
])

AC_DEFUN([CL_CANONICAL_HOST_CPU_FOR_FFCALL],
[AC_REQUIRE([CL_CANONICAL_HOST])AC_REQUIRE([AC_PROG_CC])
case "$host_cpu" in
changequote(,)dnl
  i[4567]86 )
    host_cpu=i386
    ;;
  alphaev[4-8] | alphaev56 | alphapca5[67] | alphaev6[78] )
    host_cpu=alpha
    ;;
  hppa1.0 | hppa1.1 | hppa2.0* | hppa64 )
    host_cpu=hppa
    ;;
  powerpc )
    host_cpu=rs6000
    ;;
  c1 | c2 | c32 | c34 | c38 | c4 )
    host_cpu=convex
    ;;
  arm* )
    host_cpu=arm
    ;;
changequote([,])dnl
  mips )
    AC_CACHE_CHECK([for 64-bit MIPS], cl_cv_host_mips64, [
AC_EGREP_CPP(yes,
[#if defined(_MIPS_SZLONG)
#if (_MIPS_SZLONG == 64)
/* We should also check for (_MIPS_SZPTR == 64), but gcc keeps this at 32. */
  yes
#endif
#endif
], cl_cv_host_mips64=yes, cl_cv_host_mips64=no)
])
if test $cl_cv_host_mips64 = yes; then
  host_cpu=mips64
else
  AC_CACHE_CHECK([for MIPS with n32 ABI], cl_cv_host_mipsn32, [
dnl Strictly speaking, the MIPS ABI (-32 or -n32) is independent from the CPU
dnl identification (-mips[12] or -mips[34]). But -n32 is commonly used together
dnl with -mips3, and it's easier to test the CPU identification.
AC_EGREP_CPP(yes,
[#if __mips >= 3
  yes
#endif
], cl_cv_host_mipsn32=yes, cl_cv_host_mipsn32=no)
])
if test $cl_cv_host_mipsn32 = yes; then
  host_cpu=mipsn32
fi
fi
    ;;
dnl UltraSPARCs running Linux have `uname -m` = "sparc64", but the C compiler
dnl still generates 32-bit code.
  sparc | sparc64 )
    AC_CACHE_CHECK([for 64-bit SPARC], cl_cv_host_sparc64, [
AC_EGREP_CPP(yes,
[#if defined(__sparcv9) || defined(__arch64__)
  yes
#endif
], cl_cv_host_sparc64=yes, cl_cv_host_sparc64=no)
])
if test $cl_cv_host_sparc64 = yes; then
  host_cpu=sparc64
else
  host_cpu=sparc
fi
    ;;
esac
dnl was AC_DEFINE_UNQUOTED(__${host_cpu}__) but KAI C++ 3.2d doesn't like this
cat >> confdefs.h <<EOF
#ifndef __${host_cpu}__
#define __${host_cpu}__ 1
#endif
EOF
])