src/MacOSX/configure.in

dnl Mac OS X configuration driver
dnl $Id: configure.in,v 1.22 2007/06/15 09:16:58 gbeauche Exp $
dnl Process this file with autoconf to produce a configure script.
dnl Based on Unix/configure.in
dnl Written in 1999 by Christian Bauer et al.
dnl Occasionally re-synchronised (merged?) with latest version
dnl Written in 2002 by Christian Bauer et al.

dnl autoconf on 10.1 doesn't understand these
dnl AC_INIT([Basilisk II], 1.0, [Christian.Bauer@uni-mainz.de], BasiliskII)
dnl AC_CONFIG_SRCDIR(main_macosx.mm)
AC_INIT(main_macosx.mm)
AC_CONFIG_AUX_DIR(../Unix)
AC_PREREQ(2.12)
AC_CONFIG_HEADER(config.h)

dnl Aliases for PACKAGE and VERSION macros.
AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE_NAME", [Define this program name.])
AC_DEFINE_UNQUOTED(VERSION, "$PACKAGE_VERSION", [Define this program version.])

dnl Some systems do not put corefiles in the currect directory, avoid saving
dnl cores for the configure tests since some are intended to dump core.
ulimit -c 0

dnl Video options.
AC_ARG_ENABLE(multiwin,
[  --enable-multiwin    allow multiple emulator windows [default=no]], [ENABLE_MULTIPLE=$enableval], [ENABLE_MULTIPLE=no])

dnl JIT compiler options.
AC_ARG_ENABLE(jit-compiler,  [  --enable-jit-compiler   enable JIT compiler [default=no]], [WANT_JIT=$enableval], [WANT_JIT=no])
AC_ARG_ENABLE(jit-debug,     [  --enable-jit-debug      activate native code disassemblers [default=no]], [WANT_JIT_DEBUG=$enableval], [WANT_JIT_DEBUG=no])

dnl FPU emulation core.
AC_ARG_ENABLE(fpe,
[  --enable-fpe=FPE        specify which fpu emulator to use [default=auto]],
[ case "$enableval" in
    dnl default is always ieee, if architecture has this fp format
    auto)       FPE_CORE_TEST_ORDER="ieee uae";;
    ieee)       FPE_CORE_TEST_ORDER="ieee";;
    uae)        FPE_CORE_TEST_ORDER="uae";;
    x86)        FPE_CORE_TEST_ORDER="x86";;
        *)              AC_MSG_ERROR([--enable-fpe takes only one of the following values: auto, x86, ieee, uae]);;
  esac
],
[ FPE_CORE_TEST_ORDER="ieee uae"
])

dnl Addressing modes.
AC_ARG_ENABLE(addressing,
[  --enable-addressing=AM  specify the addressing mode to use [default=fastest]],
[ case "$enableval" in
    real)       ADDRESSING_TEST_ORDER="real";;
    direct)     ADDRESSING_TEST_ORDER="direct";;
    banks)      ADDRESSING_TEST_ORDER="banks";;
    fastest)ADDRESSING_TEST_ORDER="direct banks";;
    *)          AC_MSG_ERROR([--enable-addressing takes only one of the following values: fastest, real, direct, banks]);;
  esac
],
[ ADDRESSING_TEST_ORDER="direct banks"
])

dnl External packages.
AC_ARG_WITH(mon,             [  --with-mon              use mon as debugger [default=yes]], [WANT_MON=$withval], [WANT_MON=yes])

dnl Canonical system information.
AC_CANONICAL_HOST
AC_CANONICAL_TARGET

dnl Target OS type (target is host if not cross-compiling).
case "$target_os" in
  linux*)       OS_TYPE=linux;;
  netbsd*)      OS_TYPE=netbsd;;
  freebsd*)     OS_TYPE=freebsd;;
  solaris*)     OS_TYPE=solaris;;
  darwin*)      OS_TYPE=darwin;;
  *)            OS_TYPE=`echo $target_os | sed -e 's/-/_/g' | sed -e 's/\./_/g'`;;
esac
DEFINES="$DEFINES -DOS_$OS_TYPE"

dnl Target CPU type.
HAVE_I386=no
HAVE_M68K=no
HAVE_SPARC=no
HAVE_POWERPC=no
HAVE_X86_64=no
case "$target_cpu" in
  i386* | i486* | i586* | i686* | i786* ) HAVE_I386=yes;;
  m68k* ) HAVE_M68K=yes;;
  sparc* ) HAVE_SPARC=yes;;
  powerpc* ) HAVE_POWERPC=yes;;
  x86_64* ) HAVE_X86_64=yes;;
esac

dnl Checks for programs.
AC_PROG_CC
AC_PROG_CC_C_O
AC_PROG_CPP
AC_PROG_CXX
AC_PROG_MAKE_SET
AC_PROG_INSTALL
AC_PROG_EGREP

dnl We use mon if possible.
MONSRCS=
if [[ "x$WANT_MON" = "xyes" ]]; then
  AC_MSG_CHECKING(for mon)
  mon_srcdir=../../../mon/src
  if grep mon_init $mon_srcdir/mon.h >/dev/null 2>/dev/null; then
    AC_MSG_RESULT(yes)
    AC_DEFINE(ENABLE_MON, 1, [Define if using "mon".])
    MONSRCS="$mon_srcdir/mon.cpp $mon_srcdir/mon_6502.cpp $mon_srcdir/mon_z80.cpp $mon_srcdir/mon_cmd.cpp $mon_srcdir/mon_disass.cpp $mon_srcdir/mon_ppc.cpp $mon_srcdir/mon_lowmem.cpp $mon_srcdir/disass/floatformat.c $mon_srcdir/disass/i386-dis.c $mon_srcdir/disass/m68k-dis.c $mon_srcdir/disass/m68k-opc.c $mon_srcdir/disass/mips-dis.c $mon_srcdir/disass/mips-opc.c $mon_srcdir/disass/mips16-opc.c"
    AC_SUBST(MONSRCS)
    CXXFLAGS="$CXXFLAGS -I$mon_srcdir -I$mon_srcdir/disass"
    AC_CHECK_LIB(ncurses, tgetent, ,
      AC_CHECK_LIB(termcap, tgetent, ,
        AC_CHECK_LIB(termlib, tgetent, ,
          AC_CHECK_LIB(terminfo, tgetent, ,
            AC_CHECK_LIB(Hcurses, tgetent, ,
              AC_CHECK_LIB(curses, tgetent))))))
    AC_CHECK_LIB(readline, readline)
  else
    AC_MSG_RESULT(no)
    AC_MSG_WARN([Could not find mon, ignoring --with-mon.])
    WANT_MON=no
  fi
fi

dnl We want pthreads. Try libpthread first, then libc_r (FreeBSD), then PTL.
HAVE_PTHREADS=yes
AC_CHECK_LIB(pthread, pthread_create, , [
  AC_CHECK_LIB(c_r, pthread_create, , [
    AC_CHECK_LIB(PTL, pthread_create, , [
      HAVE_PTHREADS=no
    ])
  ])
])
dnl OS X does have pthreads, but not in any of the above locations:
HAVE_PTHREADS=yes
if [[ "x$HAVE_PTHREADS" = "xyes" ]]; then
  AC_DEFINE(HAVE_PTHREADS, 1, [Define if pthreads are available.])
fi
AC_CHECK_FUNCS(pthread_cond_init)
AC_CHECK_FUNCS(pthread_cancel pthread_testcancel)
AC_CHECK_FUNCS(pthread_mutexattr_setprotocol)
AC_CHECK_FUNCS(pthread_mutexattr_settype)
AC_CHECK_FUNCS(pthread_mutexattr_setpshared)

dnl If POSIX.4 semaphores are not available, we emulate them with pthread mutexes.
SEMSRC=
AC_CHECK_FUNCS(sem_init, , [
  if test "x$HAVE_PTHREADS" = "xyes"; then
    SEMSRC=posix_sem.cpp
  fi
])

dnl We want to enable multiple window support if possible
if [[ "x$WANT_MWIN" = "xyes" ]]; then
  WANT_MWIN=yes
  DEFINES="$DEFINES -DENABLE_MULTIPLE"
fi

dnl We use 64-bit file size support if possible.
AC_SYS_LARGEFILE

dnl Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS(stdlib.h stdint.h)
AC_CHECK_HEADERS(unistd.h fcntl.h sys/types.h sys/time.h sys/mman.h mach/mach.h)
AC_CHECK_HEADERS(readline.h history.h readline/readline.h readline/history.h)
AC_CHECK_HEADERS(sys/socket.h sys/ioctl.h sys/filio.h sys/bitypes.h sys/wait.h)
AC_CHECK_HEADERS(sys/poll.h sys/select.h)
AC_CHECK_HEADERS(arpa/inet.h)
AC_CHECK_HEADERS(linux/if.h linux/if_tun.h net/if.h net/if_tun.h, [], [], [
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
])
AC_CHECK_HEADERS(AvailabilityMacros.h)
AC_CHECK_HEADERS(IOKit/storage/IOBlockStorageDevice.h)

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_BIGENDIAN
AC_C_CONST
AC_C_INLINE
AC_CHECK_SIZEOF(short, 2)
AC_CHECK_SIZEOF(int, 4)
AC_CHECK_SIZEOF(long, 4)
AC_CHECK_SIZEOF(long long, 8)
AC_CHECK_SIZEOF(float, 4)
AC_CHECK_SIZEOF(double, 8)
AC_CHECK_SIZEOF(long double, 12)
AC_CHECK_SIZEOF(void *, 4)
AC_TYPE_OFF_T
dnl These two symbols are not defined in 10.1's autoconf:
dnl AC_CHECK_TYPE(loff_t, off_t)
dnl AC_CHECK_TYPE(caddr_t, [char *])
dnl We define loff_t as a typedef of off_t in sysdeps.h if we don't have LOFF_T
dnl OS X does have caddr_t, but the above check doesn't work, so we have to do:
AC_DEFINE(HAVE_CADDR_T, 1, [The type "caddr_t" does exist on MacOS X.])
AC_TYPE_SIZE_T
AC_TYPE_SIGNAL
AC_HEADER_TIME
AC_STRUCT_TM

dnl Check whether sys/socket.h defines type socklen_t.
dnl (extracted from ac-archive/Miscellaneous)
AC_CACHE_CHECK([for socklen_t],
  ac_cv_type_socklen_t, [
  AC_TRY_COMPILE([
    #include <sys/types.h>
    #include <sys/socket.h>
  ], [socklen_t len = 42; return 0;],
  ac_cv_type_socklen_t=yes, ac_cv_type_socklen_t=no,
  dnl When cross-compiling, do not assume anything.
  ac_cv_type_socklen_t="guessing no"
  )
])
if [[ "x$ac_cv_type_socklen_t" != "xyes" ]]; then
  AC_DEFINE(socklen_t, int, [Define to 'int' if <sys/types.h> doesn't define.])
fi

dnl Checks for library functions.
AC_CHECK_FUNCS(strdup strerror cfmakeraw)
AC_CHECK_FUNCS(clock_gettime timer_create)
AC_CHECK_FUNCS(sigaction signal)
AC_CHECK_FUNCS(mmap mprotect munmap)
AC_CHECK_FUNCS(vm_allocate vm_deallocate vm_protect)
AC_CHECK_FUNCS(poll inet_aton)

dnl Darwin seems to define mach_task_self() instead of task_self().
AC_CHECK_FUNCS(mach_task_self task_self)

dnl Check for headers and functions related to pty support (sshpty.c)
dnl From openssh-3.2.2p1 configure.ac

AC_CHECK_HEADERS(strings.h login.h sys/bsdtty.h sys/stat.h util.h pty.h)
AC_CHECK_FUNCS(_getpty vhangup strlcpy)
if test -z "$no_dev_ptmx" ; then
        if test "x$disable_ptmx_check" != "xyes" ; then
                AC_CHECK_FILE([/dev/ptmx],
                        [
                                AC_DEFINE_UNQUOTED(HAVE_DEV_PTMX, 1, [Define if you have /dev/ptmx.])
                                have_dev_ptmx=1
                        ]
                )
        fi
fi
AC_CHECK_FILE([/dev/ptc],
        [
                AC_DEFINE_UNQUOTED(HAVE_DEV_PTS_AND_PTC, 1, [Define if you have /dev/ptc.])
                have_dev_ptc=1
        ]
)

dnl (end of code from openssh-3.2.2p1 configure.ac)


dnl Check for systems where POSIX-style non-blocking I/O (O_NONBLOCK)
dnl doesn't work or is unimplemented. On these systems (mostly older
dnl ones), use the old BSD-style FIONBIO approach instead. [tcl.m4]
AC_CACHE_CHECK([FIONBIO vs. O_NONBLOCK for non-blocking I/O],
  ac_cv_nonblocking_io, [
  case "$host" in
  *-*-osf*)
    ac_cv_nonblocking_io=FIONBIO
    ;;
  *-*-sunos4*)
    ac_cv_nonblocking_io=FIONBIO
    ;;
  *-*-ultrix*)
    ac_cv_nonblocking_io=FIONBIO
    ;;
  *)
    ac_cv_nonblocking_io=O_NONBLOCK
    ;;
  esac
])
if [[ "$ac_cv_nonblocking_io" = "FIONBIO" ]]; then
  AC_DEFINE(USE_FIONBIO, 1, [Define if BSD-style non-blocking I/O is to be used])
fi

dnl Check whether compiler supports byte bit-fields
AC_CACHE_CHECK([whether compiler supports byte bit-fields],
  ac_cv_have_byte_bitfields, [
  AC_LANG_SAVE
  AC_LANG_CPLUSPLUS
  AC_TRY_RUN([
    struct A {
      unsigned char b1:4;
      unsigned char b2:4;
      unsigned char c;
      unsigned short s;
      unsigned char a[4];
    };

    int main(void) {
      A a;
      return ! (sizeof(A) == 8 && &a.c == ((unsigned char *)&a + 1));
    }],
    [ac_cv_have_byte_bitfields=yes],
    [ac_cv_have_byte_bitfields=no],
    dnl When cross-compiling, assume only GCC supports this
    [if [[ "$GCC" = "yes" ]]; then
      ac_cv_have_byte_bitfields="guessing yes"
    else
      ac_cv_have_byte_bitfields="guessing no"
    fi]
    )
  AC_LANG_RESTORE
])

dnl AC_CHECK_FRAMEWORK($1=NAME, $2=INCLUDES)
AC_DEFUN([AC_CHECK_FRAMEWORK], [
  AS_VAR_PUSHDEF([ac_Framework], [ac_cv_framework_$1])dnl
  AC_CACHE_CHECK([whether compiler supports framework $1],
    ac_Framework, [
    saved_LIBS="$LIBS"
    LIBS="$LIBS -framework $1"
    AC_TRY_LINK(
      [$2], [],
      [AS_VAR_SET(ac_Framework, yes)], [AS_VAR_SET(ac_Framework, no); LIBS="$saved_LIBS"]
    )
  ])
  AS_IF([test AS_VAR_GET(ac_Framework) = yes],
    [AC_DEFINE(AS_TR_CPP(HAVE_FRAMEWORK_$1), 1, [Define if framework $1 is available.])]
  )
  AS_VAR_POPDEF([ac_Framework])dnl
])

dnl Check for some MacOS X frameworks
AC_CHECK_FRAMEWORK(AppKit, [])
AC_CHECK_FRAMEWORK(Carbon, [#include <Carbon/Carbon.h>])
AC_CHECK_FRAMEWORK(IOKit, [#include <IOKit/IOKitLib.h>])
AC_CHECK_FRAMEWORK(CoreFoundation, [#include <CoreFoundation/CoreFoundation.h>])
AC_CHECK_FRAMEWORK(CoreAudio, [#include <CoreAudio/CoreAudio.h>])
AC_CHECK_FRAMEWORK(AudioUnit, [#include <AudioUnit/AudioUnit.h>])
AC_CHECK_FRAMEWORK(AudioToolbox, [#include <AudioToolbox/AudioToolbox.h>])

dnl Select system-dependant source files.
  ETHERSRC=ether_unix.cpp
  DEFINES="$DEFINES -DBSD_COMP"
  CXXFLAGS="$CXXFLAGS -fpermissive"
  dnl Check for the CAM library
  AC_CHECK_LIB(cam, cam_open_btl, HAVE_LIBCAM=yes, HAVE_LIBCAM=no) 
  if [[ "x$HAVE_LIBCAM" = "xno" ]]; then
    AC_MSG_WARN([Cannot find libcam for SCSI management, disabling SCSI support.])
  else
    dnl Check for the sys kernel includes
    AC_CHECK_HEADER(camlib.h)
    if [[ "x$ac_cv_header_camlib_h" = "xno" ]]; then
      dnl In this case I should fix this thing including a "patch"
      dnl to access directly to the functions in the kernel :) --Orlando
      AC_MSG_WARN([Cannot find includes for CAM library, disabling SCSI support.])
    else
      SCSISRC=FreeBSD/scsi_freebsd.cpp
      LIBS="$LIBS -lcam"
      DEFINES="$DEFINES -DCAM"
    fi
  fi

dnl Is the slirp library supported?
WANT_SLIRP=no
case "$ac_cv_have_byte_bitfields" in
yes|"guessing yes")
  WANT_SLIRP=yes
  ETHERSRC=ether_unix.cpp
  ;;
esac
if [[ "x$WANT_SLIRP" = "xyes" ]]; then
  AC_DEFINE(HAVE_SLIRP, 1, [Define if slirp library is supported])
  SLIRP_SRCS="\
    ../slirp/bootp.c     ../slirp/ip_output.c  ../slirp/tcp_input.c  \
    ../slirp/cksum.c     ../slirp/mbuf.c       ../slirp/tcp_output.c \
    ../slirp/debug.c     ../slirp/misc.c       ../slirp/tcp_subr.c   \
    ../slirp/if.c        ../slirp/sbuf.c       ../slirp/tcp_timer.c  \
    ../slirp/ip_icmp.c   ../slirp/slirp.c      ../slirp/tftp.c       \
    ../slirp/ip_input.c  ../slirp/socket.c     ../slirp/udp.c"
fi
AC_SUBST(WANT_SLIRP)
AC_SUBST(SLIRP_SRCS)


dnl Define a macro that translates a yesno-variable into a C macro definition
dnl to be put into the config.h file
dnl $1 -- the macro to define
dnl $2 -- the value to translate
dnl $3 -- template name
AC_DEFUN([AC_TRANSLATE_DEFINE], [
    if [[ "x$2" = "xyes" -o "x$2" = "xguessing yes" ]]; then
        AC_DEFINE($1, 1, $3)
    fi
])

dnl Check that the host supports TUN/TAP devices
AC_CACHE_CHECK([whether TUN/TAP is supported],
  ac_cv_tun_tap_support, [
  AC_TRY_COMPILE([
    #if defined(HAVE_LINUX_IF_H) && defined(HAVE_LINUX_IF_TUN_H)
    #include <linux/if.h>
    #include <linux/if_tun.h>
    #endif
    #if defined(HAVE_NET_IF_H) && defined(HAVE_NET_IF_TUN_H)
    #include <net/if.h>
    #include <net/if_tun.h>
    #endif
  ], [
    struct ifreq ifr;
    memset(&ifr, 0, sizeof(ifr));
    ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
  ],
  ac_cv_tun_tap_support=yes, ac_cv_tun_tap_support=no
  )
])
AC_TRANSLATE_DEFINE(ENABLE_TUNTAP, "$ac_cv_tun_tap_support",
  [Define if your system supports TUN/TAP devices.])

dnl Various checks if the system supports vm_allocate() and the like functions.
have_mach_vm=no
if [[ "x$ac_cv_func_vm_allocate" = "xyes" -a "x$ac_cv_func_vm_deallocate" = "xyes" -a \
      "x$ac_cv_func_vm_protect" = "xyes" ]]; then
  have_mach_vm=yes
fi
AC_TRANSLATE_DEFINE(HAVE_MACH_VM, "$have_mach_vm",
  [Define if your system has a working vm_allocate()-based memory allocator.])

dnl Check that vm_allocate(), vm_protect() work
if [[ "x$have_mach_vm" = "xyes" ]]; then

AC_CACHE_CHECK([whether vm_protect works],
  ac_cv_vm_protect_works, [
  AC_LANG_SAVE
  AC_LANG_CPLUSPLUS
  ac_cv_vm_protect_works=yes
  dnl First the tests that should segfault
  for test_def in NONE_READ NONE_WRITE READ_WRITE; do
    AC_TRY_RUN([
      #define CONFIGURE_TEST_VM_MAP
      #define TEST_VM_PROT_$test_def
      #include "../Unix/vm_alloc.cpp"
    ], ac_cv_vm_protect_works=no, rm -f core,
    dnl When cross-compiling, do not assume anything
    ac_cv_vm_protect_works="guessing no"
    )
  done
  AC_TRY_RUN([
    #define CONFIGURE_TEST_VM_MAP
    #define TEST_VM_PROT_RDWR_WRITE
    #include "../Unix/vm_alloc.cpp"
  ], , ac_cv_vm_protect_works=no,
  dnl When cross-compiling, do not assume anything
  ac_cv_vm_protect_works="guessing no"
  )
  AC_LANG_RESTORE
  ]
)

dnl Remove support for vm_allocate() if vm_protect() does not work
if [[ "x$have_mach_vm" = "xyes" ]]; then
  case $ac_cv_vm_protect_works in
    *yes) have_mach_vm=yes;;
    *no) have_mach_vm=no;;
  esac
fi
AC_TRANSLATE_DEFINE(HAVE_MACH_VM, "$have_mach_vm",
  [Define if your system has a working vm_allocate()-based memory allocator.])

fi dnl HAVE_MACH_VM

dnl Various checks if the system supports mmap() and the like functions.
dnl ... and Mach memory allocators are not supported
have_mmap_vm=no
if [[ "x$ac_cv_func_mmap" = "xyes" -a "x$ac_cv_func_munmap" = "xyes" -a \
      "x$ac_cv_func_mprotect" = "xyes" ]]; then
  if [[ "x$have_mach_vm" = "xno" ]]; then
    have_mmap_vm=yes
  fi
fi
AC_TRANSLATE_DEFINE(HAVE_MMAP_VM, "$have_mmap_vm",
  [Define if your system has a working mmap()-based memory allocator.])

dnl Check that mmap() and associated functions work.
if [[ "x$have_mmap_vm" = "xyes" ]]; then

dnl Check if we have a working anonymous mmap()
AC_CACHE_CHECK([whether mmap supports MAP_ANON],
  ac_cv_mmap_anon, [
  AC_LANG_SAVE
  AC_LANG_CPLUSPLUS
  AC_TRY_RUN([
    #define HAVE_MMAP_ANON
    #define CONFIGURE_TEST_VM_MAP
    #define TEST_VM_MMAP_ANON
    #include "../Unix/vm_alloc.cpp"
  ], ac_cv_mmap_anon=yes, ac_cv_mmap_anon=no,
  dnl When cross-compiling, do not assume anything.
  ac_cv_mmap_anon="guessing no"
  )
  AC_LANG_RESTORE
  ]
)
AC_TRANSLATE_DEFINE(HAVE_MMAP_ANON, "$ac_cv_mmap_anon",
  [Define if <sys/mman.h> defines MAP_ANON and mmap()'ing with MAP_ANON works.])

AC_CACHE_CHECK([whether mmap supports MAP_ANONYMOUS],
  ac_cv_mmap_anonymous, [
  AC_LANG_SAVE
  AC_LANG_CPLUSPLUS
  AC_TRY_RUN([
    #define HAVE_MMAP_ANONYMOUS
    #define CONFIGURE_TEST_VM_MAP
    #define TEST_VM_MMAP_ANON
    #include "../Unix/vm_alloc.cpp"
  ], ac_cv_mmap_anonymous=yes, ac_cv_mmap_anonymous=no,
  dnl When cross-compiling, do not assume anything.
  ac_cv_mmap_anonymous="guessing no"
  )
  AC_LANG_RESTORE
  ]
)
AC_TRANSLATE_DEFINE(HAVE_MMAP_ANONYMOUS, "$ac_cv_mmap_anonymous",
  [Define if <sys/mman.h> defines MAP_ANONYMOUS and mmap()'ing with MAP_ANONYMOUS works.])

AC_CACHE_CHECK([whether mprotect works],
  ac_cv_mprotect_works, [
  AC_LANG_SAVE
  AC_LANG_CPLUSPLUS
  ac_cv_mprotect_works=yes
  dnl First the tests that should segfault
  for test_def in NONE_READ NONE_WRITE READ_WRITE; do
    AC_TRY_RUN([
      #define CONFIGURE_TEST_VM_MAP
      #define TEST_VM_PROT_$test_def
      #include "../Unix/vm_alloc.cpp"
    ], ac_cv_mprotect_works=no, rm -f core,
    dnl When cross-compiling, do not assume anything
    ac_cv_mprotect_works="guessing no"
    )
  done
  AC_TRY_RUN([
    #define CONFIGURE_TEST_VM_MAP
    #define TEST_VM_PROT_RDWR_WRITE
    #include "../Unix/vm_alloc.cpp"
  ], , ac_cv_mprotect_works=no,
  dnl When cross-compiling, do not assume anything
  ac_cv_mprotect_works="guessing no"
  )
  AC_LANG_RESTORE
  ]
)

dnl Remove support for mmap() if mprotect() does not work
if [[ "x$have_mmap_vm" = "xyes" ]]; then
  case $ac_cv_mprotect_works in
    *yes) have_mmap_vm=yes;;
    *no) have_mmap_vm=no;;
  esac
fi
AC_TRANSLATE_DEFINE(HAVE_MMAP_VM, $have_mmap_vm,
  [Define if your system has a working mmap()-based memory allocator.])

fi dnl HAVE_MMAP_VM

dnl Check if we can modify the __PAGEZERO segment for use as Low Memory
AC_CACHE_CHECK([whether __PAGEZERO can be Low Memory area 0x0000-0x2000],
  ac_cv_pagezero_hack, [
  ac_cv_pagezero_hack=no 
  if AC_TRY_COMMAND([Darwin/testlmem.sh 0x2000]); then
    ac_cv_pagezero_hack=yes
    dnl might as well skip the test for mmap-able low memory
    ac_cv_can_map_lm=no
  fi
])
AC_TRANSLATE_DEFINE(PAGEZERO_HACK, "$ac_cv_pagezero_hack",
  [Define if the __PAGEZERO Mach-O Low Memory Globals hack works on this system.])

dnl Check if we can mmap 0x2000 bytes from 0x0000
AC_CACHE_CHECK([whether we can map Low Memory area 0x0000-0x2000],
  ac_cv_can_map_lm, [
  AC_LANG_SAVE
  AC_LANG_CPLUSPLUS
  AC_TRY_RUN([
    #include "../Unix/vm_alloc.cpp"
    int main(void) { /* returns 0 if we could map the lowmem globals */
      volatile char * lm = 0;
      if (vm_init() < 0) exit(1);
      if (vm_acquire_fixed(0, 0x2000) < 0) exit(1);
      lm[0] = 'z';
      if (vm_release((char *)lm, 0x2000) < 0) exit(1);
      vm_exit(); exit(0);
    }
  ], ac_cv_can_map_lm=yes, ac_cv_can_map_lm=no,
  dnl When cross-compiling, do not assume anything.
  ac_cv_can_map_lm="guessing no"
  )
  AC_LANG_RESTORE
  ]
)

dnl Check signal handlers need to be reinstalled
AC_CACHE_CHECK([whether signal handlers need to be reinstalled],
  ac_cv_signal_need_reinstall, [
  AC_LANG_SAVE
  AC_LANG_CPLUSPLUS
  AC_TRY_RUN([
    #include <stdlib.h>
    #ifdef HAVE_UNISTD_H
    #include <unistd.h>
    #endif
    #include <signal.h>
    static int handled_signal = 0;
    RETSIGTYPE sigusr1_handler(int) { handled_signal++; }
    int main(void) { /* returns 0 if signals need not to be reinstalled */
      signal(SIGUSR1, sigusr1_handler); raise(SIGUSR1); raise(SIGUSR1);
      exit(handled_signal == 2);
    }
  ], ac_cv_signal_need_reinstall=yes, ac_cv_signal_need_reinstall=no,
  dnl When cross-compiling, do not assume anything.
  ac_cv_signal_need_reinstall="guessing yes"
  )
  AC_LANG_RESTORE
  ]
)
AC_TRANSLATE_DEFINE(SIGNAL_NEED_REINSTALL, "$ac_cv_signal_need_reinstall",
  [Define if your system requires signals to be reinstalled.])

dnl Check if sigaction handlers need to be reinstalled
AC_CACHE_CHECK([whether sigaction handlers need to be reinstalled],
  ac_cv_sigaction_need_reinstall, [
  AC_LANG_SAVE
  AC_LANG_CPLUSPLUS
  AC_TRY_RUN([
    #include <stdlib.h>
    #ifdef HAVE_UNISTD_H
    #include <unistd.h>
    #endif
    #include <signal.h>
    static int handled_signal = 0;
    RETSIGTYPE sigusr1_handler(int) { handled_signal++; }
    typedef RETSIGTYPE (*signal_handler)(int);
    static signal_handler mysignal(int sig, signal_handler handler) {
      struct sigaction old_sa;
      struct sigaction new_sa;
      new_sa.sa_handler = handler;
      return ((sigaction(sig,&new_sa,&old_sa) < 0) ? SIG_IGN : old_sa.sa_handler);
    }
    int main(void) { /* returns 0 if signals need not to be reinstalled */
      mysignal(SIGUSR1, sigusr1_handler); raise(SIGUSR1); raise(SIGUSR1);
      exit(handled_signal == 2);
    }
  ], ac_cv_sigaction_need_reinstall=yes, ac_cv_sigaction_need_reinstall=no,
  dnl When cross-compiling, do not assume anything.
  ac_cv_sigaction_need_reinstall="guessing yes"
  )
  AC_LANG_RESTORE
  ]
)
AC_TRANSLATE_DEFINE(SIGACTION_NEED_REINSTALL, "$ac_cv_sigaction_need_reinstall",
  [Define if your system requires sigactions to be reinstalled.])

dnl Check if Mach exceptions supported.
AC_CACHE_CHECK([whether your system supports Mach exceptions],
  ac_cv_have_mach_exceptions, [
  AC_LANG_SAVE
  AC_LANG_CPLUSPLUS
  AC_TRY_RUN([
    #define HAVE_MACH_EXCEPTIONS 1
    #define CONFIGURE_TEST_SIGSEGV_RECOVERY
    #include "../Unix/vm_alloc.cpp"
    #include "../Unix/sigsegv.cpp"
  ], [
  sigsegv_recovery=mach
  ac_cv_have_mach_exceptions=yes
  ],
  ac_cv_have_mach_exceptions=no,
  dnl When cross-compiling, do not assume anything.
  ac_cv_have_mach_exceptions=no
  )
  AC_LANG_RESTORE
  ]
)
AC_TRANSLATE_DEFINE(HAVE_MACH_EXCEPTIONS, "$ac_cv_have_mach_exceptions",
  [Define if your system supports Mach exceptions.])

dnl Otherwise, check if extended signals are supported.
if [[ -z "$sigsegv_recovery" ]]; then
  AC_CACHE_CHECK([whether your system supports extended signal handlers],
    ac_cv_have_extended_signals, [
    AC_LANG_SAVE
    AC_LANG_CPLUSPLUS
    AC_TRY_RUN([
      #define HAVE_SIGINFO_T 1
      #define CONFIGURE_TEST_SIGSEGV_RECOVERY
      #include "../Unix/vm_alloc.cpp"
      #include "../Unix/sigsegv.cpp"
    ], [
    sigsegv_recovery=siginfo
    ac_cv_have_extended_signals=yes
    ],
    ac_cv_have_extended_signals=no,
    dnl When cross-compiling, do not assume anything.
    ac_cv_have_extended_signals=no
    )
    AC_LANG_RESTORE
    ]
  )
  AC_TRANSLATE_DEFINE(HAVE_SIGINFO_T, "$ac_cv_have_extended_signals",
    [Define if your system support extended signals.])
fi

dnl Otherwise, check for subterfuges.
if [[ -z "$sigsegv_recovery" ]]; then
  AC_CACHE_CHECK([whether we then have a subterfuge for your system],
  ac_cv_have_sigcontext_hack, [
    AC_LANG_SAVE
    AC_LANG_CPLUSPLUS
    AC_TRY_RUN([
      #define HAVE_SIGCONTEXT_SUBTERFUGE 1
      #define CONFIGURE_TEST_SIGSEGV_RECOVERY
      #include "../Unix/vm_alloc.cpp"
      #include "../Unix/sigsegv.cpp"
    ], [
    sigsegv_recovery=sigcontext
    ac_cv_have_sigcontext_hack=yes
    ],
    ac_cv_have_sigcontext_hack=no,
    dnl When cross-compiling, do not assume anything.
    ac_cv_have_sigcontext_hack=no
    )
    AC_LANG_RESTORE
  ])
  AC_TRANSLATE_DEFINE(HAVE_SIGCONTEXT_SUBTERFUGE, "$ac_cv_have_sigcontext_hack",
    [Define if we know a hack to replace siginfo_t->si_addr member.])
fi

dnl Check if we can ignore the fault (instruction skipping in SIGSEGV handler)
AC_CACHE_CHECK([whether we can skip instruction in SIGSEGV handler],
  ac_cv_have_skip_instruction, [
  AC_LANG_SAVE
  AC_LANG_CPLUSPLUS
  AC_TRY_RUN([
    #define HAVE_SIGSEGV_SKIP_INSTRUCTION 1
    #define CONFIGURE_TEST_SIGSEGV_RECOVERY
    #include "../Unix/vm_alloc.cpp"
    #include "../Unix/sigsegv.cpp"
  ], ac_cv_have_skip_instruction=yes, ac_cv_have_skip_instruction=no,
  dnl When cross-compiling, do not assume anything.
  ac_cv_have_skip_instruction=no
  )
  AC_LANG_RESTORE
  ]
)
AC_TRANSLATE_DEFINE(HAVE_SIGSEGV_SKIP_INSTRUCTION, "$ac_cv_have_skip_instruction",
  [Define if we can ignore the fault (instruction skipping in SIGSEGV handler).])

dnl Can we do Video on SEGV Signals ?
CAN_VOSF=no
if [[ -n "$sigsegv_recovery" ]]; then
  CAN_VOSF=yes
fi

dnl A dummy program that returns always true
AC_PATH_PROG([BLESS], "true")

dnl Check for linker script support
case $target_os:$target_cpu in
linux*:i?86)    LINKER_SCRIPT_FLAGS="-Wl,-T,ldscripts/linux-i386.ld";;
linux*:x86_64)  LINKER_SCRIPT_FLAGS="-Wl,-T,ldscripts/linux-x86_64.ld";;
linux*:powerpc) LINKER_SCRIPT_FLAGS="-Wl,-T,ldscripts/linux-ppc.ld";;
netbsd*:i?86)   LINKER_SCRIPT_FLAGS="-Wl,-T,ldscripts/linux-i386.ld";;
freebsd*:i?86)  LINKER_SCRIPT_FLAGS="-Wl,-T,ldscripts/freebsd-i386.ld";;
darwin*:*)      LINKER_SCRIPT_FLAGS="-Wl,-seg1addr,0x78048000";;
esac
if [[ -n "$LINKER_SCRIPT_FLAGS" ]]; then
  AC_CACHE_CHECK([whether linker script is usable],
    ac_cv_linker_script_works, [
    AC_LANG_SAVE
    AC_LANG_CPLUSPLUS
    saved_LDFLAGS="$LDFLAGS"
    LDFLAGS="$LDFLAGS $LINKER_SCRIPT_FLAGS"
    AC_TRY_RUN(
      [int main() {if ((char *)&main < (char *)0x70000000) return 1;}],
      [ac_cv_linker_script_works=yes],
      [ac_cv_linker_script_works=no],
      dnl When cross-compiling, assume it works
      [ac_cv_linker_script_works="guessing yes"]
    )
    AC_LANG_RESTORE
    if [[ "$ac_cv_linker_script_works" = "no" ]]; then
      LDFLAGS="$saved_LDFLAGS"
      LINKER_SCRIPT_FLAGS=""
    fi
  ])
fi
AC_TRANSLATE_DEFINE(HAVE_LINKER_SCRIPT, "$ac_cv_linker_script_works",
  [Define if there is a linker script to relocate the executable above 0x70000000.])

dnl Determine the addressing mode to use
ADDRESSING_MODE=""
AC_MSG_CHECKING([for the addressing mode to use])
  for am in $ADDRESSING_TEST_ORDER; do
    case $am in
    real)
      dnl Requires ability to mmap() Low Memory globals
      if [[ "x$ac_cv_can_map_lm$ac_cv_pagezero_hack" = "xnono" ]]; then
        continue
      fi
      dnl Requires VOSF screen updates
      if [[ "x$CAN_VOSF" = "xno" ]]; then
        continue
      fi
      dnl Real addressing will probably work.
      ADDRESSING_MODE="real"
      WANT_VOSF=yes dnl we can use VOSF and we need it actually
      DEFINES="$DEFINES -DREAL_ADDRESSING"
      AC_DEFINE(REAL_ADDRESSING, 1, [Emulated memory is memory mapped to actual address.])
      if [[ "x$ac_cv_pagezero_hack" = "xyes" ]]; then
        BLESS=Darwin/lowmem
        LDFLAGS="$LDFLAGS -pagezero_size 0x2000"
      fi
      break
      ;;
    direct)
      dnl Requires VOSF screen updates
      if [[ "x$CAN_VOSF" = "xyes" ]]; then
        ADDRESSING_MODE="direct"
        WANT_VOSF=yes dnl we can use VOSF and we need it actually
        DEFINES="$DEFINES -DDIRECT_ADDRESSING"
        AC_DEFINE(DIRECT_ADDRESSING, 1, [Emulated memory is an offset from actual address.])
        break
      fi
      ;;
    banks)
      dnl Default addressing mode
      ADDRESSING_MODE="memory banks"
      break
      ;;
    *)
      AC_MSG_ERROR([Internal configure.in script error for $am addressing mode])
    esac
  done
AC_MSG_RESULT($ADDRESSING_MODE)
if [[ "x$ADDRESSING_MODE" = "x" ]]; then
  AC_MSG_WARN([Sorry, no suitable addressing mode in $ADDRESSING_TEST_ORDER])
  ADDRESSING_MODE="memory banks"
fi

dnl Banked Memory Addressing mode is not supported by the JIT compiler
if [[ "x$WANT_JIT" = "xyes" -a "x$ADDRESSING_MODE" = "xmemory banks" ]]; then
  AC_MSG_ERROR([Sorry, the JIT Compiler requires Direct Addressing, at least])
fi

dnl Enable VOSF screen updates with this feature is requested and feasible
if [[ "x$WANT_VOSF" = "xyes" -a "x$CAN_VOSF" = "xyes" ]]; then
    AC_DEFINE(ENABLE_VOSF, 1, [Define if using video enabled on SEGV signals.])
else
    WANT_VOSF=no
fi

dnl Check for GAS.
HAVE_GAS=no
AC_MSG_CHECKING(for GAS .p2align feature)
cat >conftest.S << EOF
        .text
        .p2align 5
EOF
if $CC conftest.S -c -o conftest.o >/dev/null 2>&1 ; then HAVE_GAS=yes; fi
AC_MSG_RESULT($HAVE_GAS)

dnl Check for GCC 2.7 or higher.
HAVE_GCC27=no
AC_MSG_CHECKING(for GCC 2.7 or higher)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#if ! (__GNUC__ - 1 > 1 || __GNUC_MINOR__ - 1 > 5)
                                     # error gcc < 2.7
                                     #endif
                                   ]])],
                  [AC_MSG_RESULT(yes); HAVE_GCC27=yes],
                  [AC_MSG_RESULT(no)])

dnl Check for GCC 3.0 or higher.
HAVE_GCC30=no
AC_MSG_CHECKING(for GCC 3.0 or higher)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#if ! (__GNUC__ >= 3)
                                     # error gcc < 3
                                     #endif
                                   ]])],
                  [AC_MSG_RESULT(yes); HAVE_GCC30=yes],
                  [AC_MSG_RESULT(no)])

dnl Check for ICC.
AC_MSG_CHECKING(for ICC)
HAVE_ICC=no
if $CXX -V -v 2>&1 | grep -q "Intel(R) C++ Compiler"; then
  HAVE_ICC=yes
fi
AC_MSG_RESULT($HAVE_ICC)

dnl Set "-fomit-frame-pointer" on i386 GCC 2.7 or higher.
dnl Also set "-fno-exceptions" for C++ because exception handling requires
dnl the frame pointer.
if [[ "x$HAVE_GCC27" = "xyes" -a "x$HAVE_I386" = "xyes" ]]; then
  CFLAGS="$CFLAGS -fomit-frame-pointer"
  CXXFLAGS="$CXXFLAGS -fomit-frame-pointer -fno-exceptions"
fi

dnl (gb) Do not merge constants since it breaks fpu/fpu_x86.cpp.
dnl As of 2001/08/02, this affects the following compilers:
dnl Official: probably gcc-3.1 (mainline CVS)
dnl Mandrake: gcc-2.96 >= 0.59mdk, gcc-3.0.1 >= 0.1mdk
dnl Red Hat : gcc-2.96 >= 89, gcc-3.0 >= 1
if [[ "x$HAVE_GCC27" = "xyes" -a "x$HAVE_ICC" = "xno" ]]; then
  SAVED_CXXFLAGS="$CXXFLAGS"
  CXXFLAGS="$CXXFLAGS -fno-merge-constants"
  AC_CACHE_CHECK([whether GCC supports constants merging], ac_cv_gcc_constants_merging, [
    AC_LANG_SAVE
    AC_LANG_CPLUSPLUS
    AC_TRY_COMPILE([],[],[ac_cv_gcc_constants_merging=yes],[ac_cv_gcc_constants_merging=no])
    AC_LANG_RESTORE
  ])
  if [[ "x$ac_cv_gcc_constants_merging" != "xyes" ]]; then
    CXXFLAGS="$SAVED_CXXFLAGS"
  fi
fi

dnl Store motion was introduced in 3.3-hammer branch and any gcc >= 3.4
dnl However, there are some corner cases exposed on x86-64
if [[ "x$HAVE_GCC27" = "xyes" -a "x$HAVE_ICC" = "xno" ]]; then
  SAVED_CXXFLAGS="$CXXFLAGS"
  CXXFLAGS="$CXXFLAGS -fno-gcse-sm"
  AC_CACHE_CHECK([whether GCC supports store motion], ac_cv_gcc_store_motion, [
    AC_LANG_SAVE
    AC_LANG_CPLUSPLUS
    AC_TRY_COMPILE([],[],[ac_cv_gcc_store_motion=yes],[ac_cv_gcc_store_motion=no])
    AC_LANG_RESTORE
  ])
  if [[ "x$ac_cv_gcc_store_motion" != "xyes" ]]; then
    CXXFLAGS="$SAVED_CXXFLAGS"
  fi
fi

dnl Add -fno-strict-aliasing for slirp sources
if [[ "x$HAVE_GCC30" = "xyes" ]]; then
  SAVED_CFLAGS="$CFLAGS"
  CFLAGS="$CFLAGS -fno-strict-aliasing"
  AC_CACHE_CHECK([whether the compiler supports -fno-strict-aliasing],
    ac_cv_gcc_no_strict_aliasing, [
    AC_TRY_COMPILE([],[],
      [ac_cv_gcc_no_strict_aliasing=yes; AC_SUBST(SLIRP_CFLAGS, "-fno-strict-aliasing")],
      [ac_cv_gcc_no_strict_aliasing=no])
  ])
  CFLAGS="$SAVED_CFLAGS"
fi

dnl Add -mdynamic-no-pic for MacOS X (XXX icc10 will support MacOS X)
if [[ "x$HAVE_GCC30" = "xyes" -a "x$HAVE_ICC" = "xno" ]]; then
  SAVED_CFLAGS="$CFLAGS"
  CFLAGS="$CFLAGS -mdynamic-no-pic"
  AC_CACHE_CHECK([whether the compiler supports -mdynamic-no-pic],
    ac_cv_gcc_mdynamic_no_pic, [
    AC_TRY_COMPILE([],[],[ac_cv_gcc_mdynamic_no_pic=yes],[ac_cv_gcc_mdynamic_no_pic=no])
  ])
  if [[ "x$ac_cv_gcc_mdynamic_no_pic" = "xyes" ]]; then
    CXXFLAGS="$CXXFLAGS -mdynamic-no-pic"
  else
    CFLAGS="$SAVED_CFLAGS"
  fi
fi

dnl Select appropriate CPU source and REGPARAM define.
ASM_OPTIMIZATIONS=none
CPUSRCS="cpuemu1.cpp cpuemu2.cpp cpuemu3.cpp cpuemu4.cpp cpuemu5.cpp cpuemu6.cpp cpuemu7.cpp cpuemu8.cpp"

dnl Other platforms should define their own set of noflags file variants
CAN_JIT=no
if [[ "x$HAVE_GCC27" = "xyes" -a "x$HAVE_I386" = "xyes" ]]; then
  dnl i386 CPU
  DEFINES="$DEFINES -DUNALIGNED_PROFITABLE -DREGPARAM=\"__attribute__((regparm(3)))\""
  if [[ "x$HAVE_GAS" = "xyes" ]]; then
    ASM_OPTIMIZATIONS=i386
    DEFINES="$DEFINES -DX86_ASSEMBLY -DOPTIMIZED_FLAGS -DSAHF_SETO_PROFITABLE"
    CAN_JIT=yes
  fi
elif [[ "x$HAVE_GCC30" = "xyes" -a "x$HAVE_X86_64" = "xyes" ]]; then
  dnl x86-64 CPU
  DEFINES="$DEFINES -DUNALIGNED_PROFITABLE"
  if [[ "x$HAVE_GAS" = "xyes" ]]; then
    ASM_OPTIMIZATIONS="x86-64"
    DEFINES="$DEFINES -DX86_64_ASSEMBLY -DOPTIMIZED_FLAGS"
    CAN_JIT=yes
  fi
fi

dnl Enable JIT compiler, if possible.
if [[ "x$WANT_JIT" = "xyes" -a "x$CAN_JIT" ]]; then
  if [[ "x$WANT_JIT_DEBUG" = "xyes" ]]; then
    if [[ "x$WANT_MON" = "xno" ]]; then
      AC_MSG_WARN([cxmon not found, ignoring --enable-jit-debug])
      WANT_JIT_DEBUG=no
    fi
  fi

  dnl IEEE core is the only FPU emulator to use with the JIT compiler
  case $FPE_CORE_TEST_ORDER in
  ieee*) ;;
  *) AC_MSG_WARN([Forcing use of the IEEE FPU core, as the JIT compiler supports only this one.]) ;;
  esac
  FPE_CORE_TEST_ORDER="ieee"
else
  WANT_JIT=no
  WANT_JIT_DEBUG=no
  JITSRCS=""
fi

dnl Utility macro used by next two tests.
dnl AC_EXAMINE_OBJECT(C source code,
dnl     commands examining object file,
dnl     [commands to run if compile failed]):
dnl
dnl Compile the source code to an object file; then convert it into a
dnl printable representation.  All unprintable characters and
dnl asterisks (*) are replaced by dots (.).  All white space is
dnl deleted.  Newlines (ASCII 0x10) in the input are preserved in the
dnl output, but runs of newlines are compressed to a single newline.
dnl Finally, line breaks are forcibly inserted so that no line is
dnl longer than 80 columns and the file ends with a newline.  The
dnl result of all this processing is in the file conftest.dmp, which
dnl may be examined by the commands in the second argument.
dnl
AC_DEFUN([gcc_AC_EXAMINE_OBJECT],
[AC_LANG_SAVE
AC_LANG_C
dnl Next bit cribbed from AC_TRY_COMPILE.
cat > conftest.$ac_ext <<EOF
[#line __oline__ "configure"
#include "confdefs.h"
$1
]EOF
if AC_TRY_EVAL(ac_compile); then
  od -c conftest.o |
    sed ['s/^[0-7]*[    ]*/ /
          s/\*/./g
          s/ \\n/*/g
          s/ [0-9][0-9][0-9]/./g
          s/  \\[^ ]/./g'] |
    tr -d '
 ' | tr -s '*' '
' | fold | sed '$a\
' > conftest.dmp
  $2
ifelse($3, , , else
  $3
)dnl
fi
rm -rf conftest*
AC_LANG_RESTORE])

dnl Floating point format probe.
dnl The basic concept is the same as the above: grep the object
dnl file for an interesting string.  We have to watch out for
dnl rounding changing the values in the object, however; this is
dnl handled by ignoring the least significant byte of the float.
dnl
dnl Does not know about VAX G-float or C4x idiosyncratic format.
dnl It does know about PDP-10 idiosyncratic format, but this is
dnl not presently supported by GCC.  S/390 "binary floating point"
dnl is in fact IEEE (but maybe we should have that in EBCDIC as well
dnl as ASCII?)
dnl
AC_DEFUN([gcc_AC_C_FLOAT_FORMAT],
[AC_CACHE_CHECK(floating point format, ac_cv_c_float_format,
[gcc_AC_EXAMINE_OBJECT(
[/* This will not work unless sizeof(double) == 8.  */
extern char sizeof_double_must_be_8 [sizeof(double) == 8 ? 1 : -1];

/* This structure must have no internal padding.  */
struct possibility {
  char prefix[8];
  double candidate;
  char postfix[8];
};

#define C(cand) { "\nformat:", cand, ":tamrof\n" }
struct possibility table [] =
{
  C( 3.25724264705901305206e+01), /* @@IEEEFP - IEEE 754 */
  C( 3.53802595280598432000e+18), /* D__float - VAX */
  C( 5.32201830133125317057e-19), /* D.PDP-10 - PDP-10 - the dot is 0x13a */
  C( 1.77977764695171661377e+10), /* IBMHEXFP - s/390 format, ascii */
  C(-5.22995989424860458374e+10)  /* IBMHEXFP - s/390 format, EBCDIC */
};],
 [if   grep 'format:.@IEEEF.:tamrof' conftest.dmp >/dev/null 2>&1; then
    ac_cv_c_float_format='IEEE (big-endian)'
  elif grep 'format:.I@@PFE.:tamrof' conftest.dmp >/dev/null 2>&1; then
    ac_cv_c_float_format='IEEE (big-endian)'
  elif grep 'format:.FEEEI@.:tamrof' conftest.dmp >/dev/null 2>&1; then
    ac_cv_c_float_format='IEEE (little-endian)'
  elif grep 'format:.EFP@@I.:tamrof' conftest.dmp >/dev/null 2>&1; then
    ac_cv_c_float_format='IEEE (little-endian)'
  elif grep 'format:.__floa.:tamrof' conftest.dmp >/dev/null 2>&1; then
    ac_cv_c_float_format='VAX D-float'
  elif grep 'format:..PDP-1.:tamrof' conftest.dmp >/dev/null 2>&1; then
    ac_cv_c_float_format='PDP-10'
  elif grep 'format:.BMHEXF.:tamrof' conftest.dmp >/dev/null 2>&1; then
    ac_cv_c_float_format='IBM 370 hex'
  else
    AC_MSG_ERROR(Unknown floating point format)
  fi],
  [AC_MSG_ERROR(compile failed)])
])
# IEEE is the default format.  If the float endianness isn't the same
# as the integer endianness, we have to set FLOAT_WORDS_BIG_ENDIAN
# (which is a tristate: yes, no, default).  This is only an issue with
# IEEE; the other formats are only supported by a few machines each,
# all with the same endianness.
format=IEEE_FLOAT_FORMAT
fbigend=
case $ac_cv_c_float_format in
    'IEEE (big-endian)' )
        if test $ac_cv_c_bigendian = no; then
            fbigend=1
        fi
        ;;
    'IEEE (little-endian)' )
        if test $ac_cv_c_bigendian = yes; then
            fbigend=0
        fi
        ;;
    'VAX D-float' )
        format=VAX_FLOAT_FORMAT
        ;;
    'PDP-10' )
        format=PDP10_FLOAT_FORMAT
        ;;
    'IBM 370 hex' )
        format=IBM_FLOAT_FORMAT
        ;;
esac
AC_DEFINE_UNQUOTED(HOST_FLOAT_FORMAT, $format,
  [Define to the floating point format of the host machine.])
if test -n "$fbigend"; then
        AC_DEFINE_UNQUOTED(HOST_FLOAT_WORDS_BIG_ENDIAN, $fbigend,
  [Define to 1 if the host machine stores floating point numbers in
   memory with the word containing the sign bit at the lowest address,
   or to 0 if it does it the other way around.

   This macro should not be defined if the ordering is the same as for
   multi-word integers.])
fi
])

dnl Select appropriate FPU source.
gcc_AC_C_FLOAT_FORMAT
AC_CHECK_HEADERS(ieee754.h ieeefp.h floatingpoint.h nan.h)

for fpe in $FPE_CORE_TEST_ORDER; do
  case $fpe in
  ieee)
    case $ac_cv_c_float_format in
    IEEE*)
      FPE_CORE="IEEE fpu core"
      DEFINES="$DEFINES -DFPU_IEEE"
      AC_DEFINE(FPU_IEEE, 1, [Floating Point Core emulation method is IEEE.])
      FPUSRCS="../uae_cpu/fpu/fpu_ieee.cpp"
      dnl Math functions not mandated by C99 standard
      AC_CHECK_FUNCS(isnanl isinfl)
      dnl Math functions required by C99 standard, but probably not
      dnl implemented everywhere. In that case, we fall back to the
      dnl regular variant for doubles.
      AC_CHECK_FUNCS(logl log10l expl powl fabsl sqrtl)
      AC_CHECK_FUNCS(sinl cosl tanl sinhl coshl tanhl)
      AC_CHECK_FUNCS(asinl acosl atanl asinhl acoshl atanhl)
      AC_CHECK_FUNCS(floorl ceill)
      break
      ;;
    esac
    ;;
  x86)
    if [[ ":$HAVE_GCC27:$HAVE_I386:$HAVE_GAS:" = ":yes:yes:yes:" ]]; then
      FPE_CORE="i387 fpu core"
      DEFINES="$DEFINES -DFPU_X86"
      FPUSRCS="../uae_cpu/fpu/fpu_x86.cpp"
      break
    fi
    ;;
  uae)
    FPE_CORE="uae fpu core"
    DEFINES="$DEFINES -DFPU_UAE"
    AC_DEFINE(FPU_UAE, 1, [Floating Point Core emulation is standard UAE.])
    FPUSRCS="../uae_cpu/fpu/fpu_uae.cpp"
    break
    ;;
  *)
    AC_MSG_ERROR([Internal configure.in script error for $fpe fpu core])
    ;;
  esac
done
if [[ "x$FPE_CORE" = "x" ]]; then
  AC_MSG_ERROR([Sorry, no suitable FPU core found in $FPE_CORE_TEST_ORDER])
fi

dnl Check for certain math functions
AC_CHECK_FUNCS(atanh)
AC_CHECK_FUNCS(isnan isinf finite isnormal signbit)

dnl UAE CPU sources for all non-m68k-native architectures.
  CPUINCLUDES="-I../uae_cpu"
  CPUSRCS="../uae_cpu/basilisk_glue.cpp ../uae_cpu/memory.cpp ../uae_cpu/newcpu.cpp ../uae_cpu/readcpu.cpp $FPUSRCS cpustbl.cpp cpudefs.cpp $CPUSRCS $JITSRCS"

dnl Remove the "-g" option if set for GCC.
if [[ "x$HAVE_GCC27" = "xyes" ]]; then
  CFLAGS=`echo $CFLAGS | sed -e 's/-g\b//g'`
  CXXFLAGS=`echo $CXXFLAGS | sed -e 's/-g\b//g'`
fi

dnl Or if we have -IPA (MIPSPro compilers)
if [[ "x$HAVE_IPA" = "xyes" ]]; then
  CFLAGS="`echo $CFLAGS | sed -e 's/-g//g'` -O3 -OPT:Olimit=0 -IPA"
  CXXFLAGS="`echo $CXXFLAGS | sed -e 's/-g//g'` -O3 -OPT:Olimit=0 -IPA"
  CXXFLAGS="-LANG:std $CXXFLAGS"
  LDFLAGS="$LDFLAGS -O3 -OPT:Olimit=0 -IPA"
fi

dnl
dnl Some Mac OS X specific stuff:
dnl

dnl MacOS 10.2 (and later?) have a particular header for defining the OS version
if [[ "x$ac_cv_header_AvailabilityMacros_h" = "xyes" ]]; then
  AC_DEFINE(AVAILABILITYMACROS, 1, [Header specific to 10.2 and later.])
fi

dnl Which IDE do we use?
if test -d "/Developer/Applications/Xcode.app"; then
  IDE=xcodebuild
  PROJECT=BasiliskII.xcode
  IDEARGS="-project BasiliskII.xcode"
else
  IDE=pbxbuild
  PROJECT=BasiliskII.pbproj
  IDEARGS=""
fi

AC_DEFINE(HAVE_SLIRP, 1, [Try to compile network emulation library!])
AC_DEFINE(DATADIR, "~", [unix_ether needs this!])

dnl Generate Makefile.
AC_SUBST(DEFINES)
AC_SUBST(MONSRCS)
AC_SUBST(CPUINCLUDES)
AC_SUBST(CPUSRCS)
AC_SUBST(BLESS)
AC_SUBST(IDE)
AC_SUBST(PROJECT)
AC_SUBST(IDEARGS)
AC_SUBST(SLIRP_SRCS)
AC_SUBST(KEYCODES)
AC_SUBST(WANT_JIT)
AC_SUBST(WANT_JIT_DEBUG)
dnl autoconf on 10.1 doesn't understand these
dnl AC_CONFIG_FILES([Makefile])
dnl AC_OUTPUT
AC_OUTPUT(Makefile)

dnl Print summary.
echo
echo Basilisk II configuration summary:
echo
echo Multiple emulator windows .............. : $ENABLE_MULTIPLE
echo Enable video on SEGV signals ........... : $WANT_VOSF
echo mon debugger support ................... : $WANT_MON
echo Build JIT compiler ..................... : $WANT_JIT
echo Build JIT with debug code .............. : $WANT_JIT_DEBUG
echo Floating-Point emulation core .......... : $FPE_CORE
echo Assembly optimizations ................. : $ASM_OPTIMIZATIONS
echo Addressing mode ........................ : $ADDRESSING_MODE
echo Bad memory access recovery type ........ : $sigsegv_recovery
echo Mac OS X development environment ....... : $IDE
echo
echo "Configuration done. Now type \"make\" (or \"make ide\")."
Revision:	1.23
Committed:	2007-06-15T10:11:28Z (17 years, 5 months ago) by gbeauche
Branch:	MAIN
Changes since 1.22:	+19 -61 lines
Log Message:	Fix cxmon files inclusion. Drop support for non ppc & x86 MacOS X arches. Make JIT files & defs selection at build-time, not configure-time (FATs). NOTE: be careful, larger changes are yet to come.