src/Unix/configure.in

dnl Process this file with autoconf to produce a configure script.
dnl Written in 1999 by Christian Bauer et al.

AC_INIT(main_unix.cpp)
AC_PREREQ(2.12)
AC_CONFIG_HEADER(config.h)

dnl Options.
AC_ARG_ENABLE(xf86-dga,      [  --enable-xf86-dga       use the XFree86 DGA extension [default=yes]], [WANT_XF86_DGA=$enableval], [WANT_XF86_DGA=yes])
AC_ARG_ENABLE(xf86-vidmode,  [  --enable-xf86-vidmode   use the XFree86 VidMode extension [default=yes]], [WANT_XF86_VIDMODE=$enableval], [WANT_XF86_VIDMODE=yes])
AC_ARG_ENABLE(fbdev-dga,     [  --enable-fbdev-dga      use direct frame buffer access via /dev/fb [default=yes]], [WANT_FBDEV_DGA=$enableval], [WANT_FBDEV_DGA=yes])
AC_ARG_ENABLE(vosf,          [  --enable-vosf           enable video on SEGV signals [default=no]], [WANT_VOSF=$enableval], [WANT_VOSF=no])
AC_ARG_ENABLE(16bit-vidmode, [  --enable-16bit-vidmode  enable 16-bit video if possible [default=yes]], [WANT_16BIT_VIDMODE=$enableval], [WANT_16BIT_VIDMODE=yes])
AC_ARG_ENABLE(addressing,
[  --enable-addressing=mode specify the addressing mode to use [default=fastest]], 
[ case "$enableval" in
    real)       ADDRESSING_TEST_ORDER="real";;
    direct)     ADDRESSING_TEST_ORDER="direct";;
    banks)      ADDRESSING_TEST_ORDER="banks";;
dnl fastest)    ADDRESSING_TEST_ORDER="real direct banks";; gb-- will enable later...
    fastest)    ADDRESSING_TEST_ORDER="direct banks";;
    *)          AC_MSG_ERROR([--enable-mem-addressing takes only one of the following values: fastest, real, direct, banks]);;
  esac
],
dnl [ ADDRESSING_TEST_ORDER="real direct banks" gb-- will probably reactivate later
[ ADDRESSING_TEST_ORDER="direct banks"
])
AC_ARG_WITH(esd,             [  --with-esd              support ESD for sound under Linux/FreeBSD [default=yes]], [WANT_ESD=$withval], [WANT_ESD=yes])
AC_ARG_WITH(gtk,             [  --with-gtk              use GTK user interface [default=yes]], [WANT_GTK=$withval], [WANT_GTK=yes])
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;;
  *)            OS_TYPE=`echo $target_os | sed -e 's/-/_/'`;;
esac
DEFINES="$DEFINES -DOS_$OS_TYPE"

dnl Target CPU type.
HAVE_I386=no
HAVE_M68K=no
HAVE_SPARC=no
case "$target_cpu" in
  i386* | i486* | i586* | i686* | i786* ) CPU_TYPE=i386 HAVE_I386=yes;;
  m68k* ) CPU_TYPE=m68k HAVE_M68K=yes;;
  sparc* ) CPU_TYPE=sparc HAVE_SPARC=yes;;
  *) CPU_TYPE=`echo $target_cpu | sed -e 's/-/_/'`;;
esac
DEFINES="$DEFINES -DCPU_$CPU_TYPE"

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

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 $mon_srcdir/mon.h >/dev/null 2>/dev/null; then
    AC_MSG_RESULT(yes)
    AC_DEFINE(ENABLE_MON)
    MONSRCS="$mon_srcdir/mon.cpp $mon_srcdir/mon_6502.cpp $mon_srcdir/mon_8080.cpp $mon_srcdir/mon_cmd.cpp $mon_srcdir/mon_disass.cpp $mon_srcdir/mon_ppc.cpp $mon_srcdir/disass/floatformat.c $mon_srcdir/disass/i386-dis.c $mon_srcdir/disass/m68k-dis.c $mon_srcdir/disass/m68k-opc.c"
    CXXFLAGS="$CXXFLAGS -I$mon_srcdir -I$mon_srcdir/disass"
    AC_CHECK_LIB(readline, readline)
    AC_CHECK_LIB(termcap, tputs)
    AC_CHECK_HEADERS(readline.h history.h readline/readline.h readline/history.h)
  else
    AC_MSG_RESULT(no)
    AC_MSG_WARN([Could not find mon, ignoring --with-mon.])
    WANT_MON=no
  fi
fi

dnl Checks for libraries.
AC_CHECK_LIB(posix4, sem_init)

dnl We need X11.
AC_PATH_XTRA
if [[ "x$no_x" = "xyes" ]]; then
  AC_MSG_ERROR([You need X11 to run Basilisk II.])
fi
CFLAGS="$CFLAGS $X_CFLAGS"
CXXFLAGS="$CXXFLAGS $X_CFLAGS"
LIBS="$LIBS $X_PRE_LIBS $X_LIBS -lX11 -lXext $X_EXTRA_LIBS"

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
    ])
  ])
])
if [[ "x$HAVE_PTHREADS" = "xyes" ]]; then
  AC_DEFINE(HAVE_PTHREADS)
fi
AC_CHECK_FUNCS(pthread_cancel)

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 use DGA (XFree86 or fbdev) if possible.
if [[ "x$WANT_XF86_DGA" = "xyes" ]]; then
  AC_CHECK_LIB(Xxf86dga, XF86DGAQueryExtension, [
    AC_DEFINE(ENABLE_XF86_DGA)
    LIBS="$LIBS -lXxf86dga"
    if [[ "x$WANT_FBDEV_DGA" = "xyes" ]]; then
      AC_MSG_WARN([Cannot have both --enable-xf86-dga and --enable-fbdev-dga, ignoring --enable-fbdev-dga.])
      WANT_FBDEV_DGA=no
    fi
  ], [
    AC_MSG_WARN([Could not find XFree86 DGA extension, ignoring --enable-xf86-dga.])
    WANT_XF86_DGA=no
  ])
fi
if [[ "x$WANT_FBDEV_DGA" = "xyes" ]]; then
  AC_DEFINE(ENABLE_FBDEV_DGA)
fi

dnl We use XFree86 VidMode if possible.
if [[ "x$WANT_XF86_VIDMODE" = "xyes" ]]; then
  AC_CHECK_LIB(Xxf86vm, XF86VidModeQueryExtension, [
    AC_DEFINE(ENABLE_XF86_VIDMODE)
    LIBS="$LIBS -lXxf86vm"
  ], [
    AC_MSG_WARN([Could not find XFree86 VidMode extension, ignoring --enable-xf86-vidmode.])
    WANT_XF86_VIDMODE=no
  ])
fi

dnl We use GTK+ if possible.
UISRCS=../dummy/prefs_editor_dummy.cpp
if [[ "x$WANT_GTK" = "xyes" ]]; then
  AM_PATH_GTK(1.2.0, [
    AC_DEFINE(ENABLE_GTK)
    CFLAGS="$CFLAGS $GTK_CFLAGS"
    CXXFLAGS="$CXXFLAGS $GTK_CFLAGS"
    LIBS="$LIBS $GTK_LIBS"
    UISRCS=prefs_editor_gtk.cpp
  ], [
    AC_MSG_WARN([Could not find GTK+, disabling user interface.])
    WANT_GTK=no
  ])
fi

dnl We use ESD if possible.
if [[ "x$WANT_ESD" = "xyes" ]]; then
  AM_PATH_ESD(0.2.8, [
    AC_DEFINE(ENABLE_ESD)
    CFLAGS="$CFLAGS $ESD_CFLAGS"
    CXXFLAGS="$CXXFLAGS $ESD_CFLAGS"
    LIBS="$LIBS $ESD_LIBS"
  ], [
    AC_MSG_WARN([Could not find ESD, disabling ESD support.])
    WANT_ESD=no
  ])
fi

dnl Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS(unistd.h fcntl.h sys/time.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(void *, 4)
AC_TYPE_OFF_T
AC_CHECK_TYPE(loff_t, off_t)
AC_TYPE_SIZE_T
AC_TYPE_SIGNAL
AC_HEADER_TIME
AC_STRUCT_TM

dnl Checks for library functions.
AC_CHECK_FUNCS(strdup cfmakeraw)
AC_CHECK_FUNCS(clock_gettime timer_create)

dnl Select system-dependant source files.
SERIALSRC=serial_unix.cpp
ETHERSRC=../dummy/ether_dummy.cpp
SCSISRC=../dummy/scsi_dummy.cpp
AUDIOSRC=../dummy/audio_dummy.cpp
EXTRASYSSRCS=
CAN_NATIVE_M68K=no
case "$target_os" in
linux*)
  ETHERSRC=Linux/ether_linux.cpp
  SCSISRC=Linux/scsi_linux.cpp
  AUDIOSRC=audio_oss_esd.cpp
  ;;
freebsd*3.*)
  AUDIOSRC=audio_oss_esd.cpp
  DEFINES="$DEFINES -DBSD_COMP"
  dnl Check for the CAM library
  AC_CHECK_LIB(cam, cam_open_btl, HAVE_LIBCAM=yes, HAVE_LIBCAM=no) 
  if [[ "x$HAVE_LIBCAM" = "xno" ]]; then
    AC_MSG_WARN([Cannot find libcam for SCSI management, disabling SCSI support.])
  else
    dnl Check for the sys kernel includes
    AC_CHECK_HEADER(/sys/cam/cam.h)
    if [[ "x$ac_cv_header__sys_cam_cam_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 kernel includes for CAM library, disabling SCSI support.])
    else
      SCSISRC=FreeBSD/scsi_freebsd.cpp
      CXXFLAGS="$CXXFLAGS -I/sys"
      CFLAGS="$CFLAGS -I/sys"
      LIBS="$LIBS -lcam"
      DEFINES="$DEFINES -DCAM"
    fi
  fi
  ;;
freebsd*)
  DEFINES="$DEFINES -DBSD_COMP"
  dnl Check for the SCSI library
  AC_CHECK_LIB(scsi, scsi_open, HAVE_LIBSCSI=yes, HAVE_LIBSCSI=no)
  if [[ "x$HAVE_LIBSCSI" = "xno" ]]; then
    AC_MSG_WARN([Cannot find libscsi for SCSI management, disabling SCSI support.])
  else
    dnl Check for the sys kernel includes
    AC_CHECK_HEADER(scsi.h sys/scsiio.h)
    if [[ "x$ac_cv_header_scsi_h" = "xno" ]]; then
      AC_MSG_WARN([Cannot find includes for the SCSI library, disabling SCSI support.])
    else
      SCSISRC=FreeBSD/scsi_freebsd.cpp
      LIBS="$LIBS -lscsi"
    fi
  fi
  ;;
netbsd*)
  CAN_NATIVE_M68K=yes
  ;;
solaris*)
  AUDIOSRC=Solaris/audio_solaris.cpp
  DEFINES="$DEFINES -DBSD_COMP -D_POSIX_PTHREAD_SEMANTICS"
  ;;
irix*)
  EXTRASYSSRCS=Irix/unaligned.c
  DEFINES="$DEFINES -DCRTSCTS=CNEW_RTSCTS -DB230400=B115200"
  LIBS="$LIBS -lm"
  ;;
esac

dnl Use 68k CPU natively?
WANT_NATIVE_M68K=no
if [[ "x$HAVE_M68K" = "xyes" -a "x$CAN_NATIVE_M68K" = "xyes" ]]; then
  AC_DEFINE(ENABLE_NATIVE_M68K)
  WANT_NATIVE_M68K=yes
fi

if [[ "x$HAVE_PTHREADS" = "xno" ]]; then
  dnl Serial, ethernet and audio support needs pthreads
  AC_MSG_WARN([You don't have pthreads, disabling serial, ethernet and audio support.])
  SERIALSRC=../dummy/serial_dummy.cpp
  ETHERSRC=../dummy/ether_dummy.cpp
  AUDIOSRC=../dummy/audio_dummy.cpp
fi
SYSSRCS="$SERIALSRC $ETHERSRC $SCSISRC $AUDIOSRC $SEMSRC $UISRCS $MONSRCS $EXTRASYSSRCS"

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
AC_DEFUN(AC_TRANSLATE_DEFINE, [
    if [[ "x$2" = "xyes" ]]; then
        AC_DEFINE($1)
    fi
])

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 <unistd.h>
    #include <fcntl.h>
    #include <sys/mman.h>
    
    int main()
    { int zero_fd; char * lm;
      if ((zero_fd = open("/dev/zero", O_RDWR)) < 0) exit(1);
      if ((lm = (char *)mmap((caddr_t)0x0000, 0x2000, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_PRIVATE, zero_fd, 0)) == MAP_FAILED) exit(1);
      lm[0] = 0x12;
          munmap(lm, 0x2000);
      close(zero_fd);
      exit(0);
    }
  ],
  [ac_cv_can_map_lm=yes],
  [ac_cv_can_map_lm=no]
  )
  AC_LANG_RESTORE
  ]
)

dnl Check if extended signals are supported.
AC_CACHE_CHECK("whether your system supports extended signal handlers",
  ac_cv_have_extended_signals, [
  AC_LANG_SAVE
  AC_LANG_CPLUSPLUS
  AC_TRY_RUN([
    #include <unistd.h>
    #include <stdlib.h>
    #include <signal.h>
    #include <fcntl.h>
    #include <sys/mman.h>

    static volatile caddr_t mem = 0;
    static int zero_fd = -1;

    static RETSIGTYPE segfault_handler(int, siginfo_t * sip, void *)
    { if ((caddr_t)(sip->si_addr) != mem) exit(1);
      munmap(mem, getpagesize()); close(zero_fd); exit(0); }

    int main()
    { if ((zero_fd = open("/dev/zero", O_RDWR)) < 0) exit(1);
      if ((mem = (caddr_t)mmap(0, getpagesize(), PROT_READ, MAP_PRIVATE, zero_fd, 0)) == (caddr_t)MAP_FAILED) exit(1);
      struct sigaction sa; sa.sa_sigaction = segfault_handler; sa.sa_flags = SA_SIGINFO;
      sigaction(SIGSEGV, &sa, 0);
      mem[0] = 0;
      exit(1); // should not be reached
    }
  ],
  [ac_cv_have_extended_signals=yes],
  [ac_cv_have_extended_signals=no]
  )
  AC_LANG_RESTORE
  ]
)
AC_TRANSLATE_DEFINE(HAVE_SIGINFO_T, "$ac_cv_have_extended_signals")
 
dnl Otherwise, check for subterfuges.
if [[ "x$ac_cv_have_extended_signals" = "xno" ]]; then
  case "$target_os" in
    linux*)
      if [[ "x$HAVE_I386" = "xyes" ]]; 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([
            #include <unistd.h>
            #include <signal.h>
            #include <fcntl.h>
            #include <sys/mman.h>

            static volatile caddr_t mem = 0;
            static int zero_fd = -1;

            static RETSIGTYPE segfault_handler(int, struct sigcontext scs)
            { if ((caddr_t)(scs.cr2) != mem) exit(1);
              munmap(mem, getpagesize()); close(zero_fd); exit(0); }

            int main()
            { if ((zero_fd = open("/dev/zero", O_RDWR)) < 0) exit(1);
              if ((mem = (caddr_t)mmap(0, getpagesize(), PROT_READ, MAP_PRIVATE, zero_fd, 0)) == (caddr_t)MAP_FAILED) exit(1);
              struct sigaction sa; sa.sa_flags = 0;
              sa.sa_handler = (RETSIGTYPE (*)(int))segfault_handler;
              sigaction(SIGSEGV, &sa, 0);
              mem[0] = 0;
              exit(1); // should not be reached
            }
          ],
          [ac_cv_have_sigcontext_hack=yes],
          [ac_cv_have_sigcontext_hack=no]
          )
          AC_LANG_RESTORE
        ])
        AC_TRANSLATE_DEFINE(HAVE_SIGCONTEXT_SUBTERFUGE, $ac_cv_have_sigcontext_hack)
      fi
      ;;
    netbsd*)
      if [[ "x$HAVE_M68K" = "xyes" ]]; 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([
            #include <unistd.h>
            #include <signal.h>
            #include <fcntl.h>
            #include <sys/mman.h>

            static volatile caddr_t mem = 0;
            static int zero_fd = -1;

            static RETSIGTYPE segfault_handler(int, int code)
            { if ((caddr_t)code != mem) exit(1);
              munmap(mem, getpagesize()); close(zero_fd); exit(0); }

            int main()
            { if ((zero_fd = open("/dev/zero", O_RDWR)) < 0) exit(1);
              if ((mem = (caddr_t)mmap(0, getpagesize(), PROT_READ, MAP_PRIVATE, zero_fd, 0)) == (caddr_t)MAP_FAILED) exit(1);
              struct sigaction sa; sa.sa_flags = 0;
              sa.sa_handler = (RETSIGTYPE (*)(int))segfault_handler;
              sigaction(SIGSEGV, &sa, 0);
              mem[0] = 0;
              exit(1); // should not be reached
            }
          ],
          [ac_cv_have_sigcontext_hack=yes],
          [ac_cv_have_sigcontext_hack=no]
          )
          AC_LANG_RESTORE
        ])
        AC_TRANSLATE_DEFINE(HAVE_SIGCONTEXT_SUBTERFUGE, $ac_cv_have_sigcontext_hack)
      fi
    ;;
  esac
fi

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

dnl Determine the addressing mode to use
if [[ "x$WANT_NATIVE_M68K" = "xyes" ]]; then
  ADDRESSING_MODE="real"
else
  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" = "xno" ]]; then
        continue
      fi
      if [[ "x$ac_cv_c_bigendian" = "xyes" ]]; then
        dnl Requires only VOSF if 16-bit vidmode enable
        if [[ "x$WANT_16BIT_VIDMODE" = "xyes" ]]; then
          if [[ "x$CAN_VOSF" = "xno" ]]; then
            continue
          fi
        else
          DEFINES="$DEFINES -DDISABLE_16BIT_VIDMODE"
        fi
      else
        dnl Requires VOSF
        if [[ "x$CAN_VOSF" = "xno" ]]; then
          continue
        fi
      fi
      dnl Real addressing will probably work
      ADDRESSING_MODE="real"
      WANT_VOSF=yes dnl we can use VOSF and we need it actually
      DEFINES="$DEFINES -DREAL_ADDRESSING"
      break
      ;;
    direct)
      dnl Requires VOSF
      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"
        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
fi

dnl Since real and direct addressing modes automatically activate VOSF,
dnl I put this test here.
if [[ "x$WANT_VOSF" = "xyes" ]]; then
  if [[ "x$CAN_VOSF" = "xno" ]]; then
    AC_MSG_WARN([Sorry, your system does not support Video on SEGV signals])
    WANT_VOSF=no
  else
    AC_DEFINE(ENABLE_VOSF)
  fi
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_EGREP_CPP(yes,
[#if __GNUC__ - 1 > 1 || __GNUC_MINOR__ - 1 > 5
  yes
#endif
], [AC_MSG_RESULT(yes); HAVE_GCC27=yes], AC_MSG_RESULT(no))

dnl Set "-fomit-frame-pointer" on i386 GCC 2.7 or higher.
if [[ "x$HAVE_GCC27" = "xyes" -a "x$HAVE_I386" = "xyes" ]]; then
  CFLAGS="$CFLAGS -fomit-frame-pointer"
  CXXFLAGS="$CXXFLAGS -fomit-frame-pointer"
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"
FPUSRCS="../uae_cpu/fpp.cpp"
if [[ "x$HAVE_GCC27" = "xyes" -a "x$HAVE_I386" = "xyes" ]]; then
  dnl i386 CPU
  DEFINES="$DEFINES -DREGPARAM=\"__attribute__((regparm(3)))\""
  if [[ "x$HAVE_GAS" = "xyes" ]]; then
    ASM_OPTIMIZATIONS=i386
    DEFINES="$DEFINES -DX86_ASSEMBLY -DOPTFLAGS"
    CPUSRCS="../uae_cpu/compiler.cpp cpufast1.s cpufast2.s cpufast3.s cpufast4.s cpufast5.s cpufast6.s cpufast7.s cpufast8.s"
    FPUSRCS="../uae_cpu/fpu_x86.cpp"
  fi
elif [[ "x$HAVE_GCC27" = "xyes" -a "x$HAVE_SPARC" = "xyes" -a "x$HAVE_GAS" = "xyes" ]]; then
  dnl SPARC CPU
  case "$target_os" in
  solaris*)
    AC_MSG_CHECKING(SPARC CPU architecture)
    SPARC_TYPE=`Solaris/which_sparc`
    AC_MSG_RESULT($SPARC_TYPE)
    case "$SPARC_TYPE" in
    SPARC_V8)
      ASM_OPTIMIZATIONS="SPARC V8 architecture"
      DEFINES="$DEFINES -DSPARC_V8_ASSEMBLY" dnl -DOPTFLAGS"
      CFLAGS="$CFLAGS -Wa,-Av8"
      CXXFLAGS="$CXXFLAGS -Wa,-Av8"
      ;;
    SPARC_V9)
      ASM_OPTIMIZATIONS="SPARC V9 architecture"
      DEFINES="$DEFINES -DSPARC_V9_ASSEMBLY" dnl -DOPTFLAGS"
      CFLAGS="$CFLAGS -Wa,-Av9"
      CXXFLAGS="$CXXFLAGS -Wa,-Av9"
      ;;
    esac
    ;;
  esac
elif [[ "x$WANT_NATIVE_M68K" = "xyes" ]]; then
  dnl Native m68k, no emulation
  CPUINCLUDES="-I../native_cpu"
  CPUSRCS="asm_support.s"
fi

dnl UAE CPU sources for all non-m68k-native architectures.
if [[ "x$WANT_NATIVE_M68K" = "xno" ]]; then
  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"
fi

dnl Remove the "-g" option if set for GCC.
if [[ "x$HAVE_GCC27" = "xyes" ]]; then
  dnl gb-- Probably not the cleanest way to take
  CFLAGS=`echo $CFLAGS | sed -e 's/ -g / /;s/^-g / /;s/ -g$/ /;s/^-g$//'`
  CXXFLAGS=`echo $CXXFLAGS | sed -e 's/ -g / /;s/^-g / /;s/ -g$/ /;s/^-g$//'`
fi

dnl Generate Makefile.
AC_SUBST(DEFINES)
AC_SUBST(SYSSRCS)
AC_SUBST(CPUINCLUDES)
AC_SUBST(CPUSRCS)
AC_OUTPUT(Makefile)

dnl Print summary.
echo
echo Basilisk II configuration summary:
echo
echo XFree86 DGA support .............. : $WANT_XF86_DGA
echo XFree86 VidMode support .......... : $WANT_XF86_VIDMODE
echo fbdev DGA support ................ : $WANT_FBDEV_DGA
echo Enable video on SEGV signals ..... : $WANT_VOSF
echo ESD sound support ................ : $WANT_ESD
echo GTK user interface ............... : $WANT_GTK
echo mon debugger support ............. : $WANT_MON
echo Running m68k code natively ....... : $WANT_NATIVE_M68K
echo Assembly optimizations ........... : $ASM_OPTIMIZATIONS
echo Addressing mode .................. : $ADDRESSING_MODE
echo
echo "Configuration done. Now type \"make\" (or \"gmake\")."
Revision:	1.27
Committed:	2000-10-11T17:55:06Z (24 years, 1 month ago) by cebix
Branch:	MAIN
Changes since 1.26:	+98 -55 lines
Log Message:	- added a few more emulated privileged instructions to NetBSD/m68k - tried to make VOSF run under NetBSD/m68k, little success (shows stripes and sometimes crashes)
#	Content
1	dnl Process this file with autoconf to produce a configure script.
2	dnl Written in 1999 by Christian Bauer et al.
3
4	AC_INIT(main_unix.cpp)
5	AC_PREREQ(2.12)
6	AC_CONFIG_HEADER(config.h)
7
8	dnl Options.
9	AC_ARG_ENABLE(xf86-dga, [ --enable-xf86-dga use the XFree86 DGA extension [default=yes]], [WANT_XF86_DGA=$enableval], [WANT_XF86_DGA=yes])
10	AC_ARG_ENABLE(xf86-vidmode, [ --enable-xf86-vidmode use the XFree86 VidMode extension [default=yes]], [WANT_XF86_VIDMODE=$enableval], [WANT_XF86_VIDMODE=yes])
11	AC_ARG_ENABLE(fbdev-dga, [ --enable-fbdev-dga use direct frame buffer access via /dev/fb [default=yes]], [WANT_FBDEV_DGA=$enableval], [WANT_FBDEV_DGA=yes])
12	AC_ARG_ENABLE(vosf, [ --enable-vosf enable video on SEGV signals [default=no]], [WANT_VOSF=$enableval], [WANT_VOSF=no])
13	AC_ARG_ENABLE(16bit-vidmode, [ --enable-16bit-vidmode enable 16-bit video if possible [default=yes]], [WANT_16BIT_VIDMODE=$enableval], [WANT_16BIT_VIDMODE=yes])
14	AC_ARG_ENABLE(addressing,
15	[ --enable-addressing=mode specify the addressing mode to use [default=fastest]],
16	[ case "$enableval" in
17	real) ADDRESSING_TEST_ORDER="real";;
18	direct) ADDRESSING_TEST_ORDER="direct";;
19	banks) ADDRESSING_TEST_ORDER="banks";;
20	dnl fastest) ADDRESSING_TEST_ORDER="real direct banks";; gb-- will enable later...
21	fastest) ADDRESSING_TEST_ORDER="direct banks";;
22	*) AC_MSG_ERROR([--enable-mem-addressing takes only one of the following values: fastest, real, direct, banks]);;
23	esac
24	],
25	dnl [ ADDRESSING_TEST_ORDER="real direct banks" gb-- will probably reactivate later
26	[ ADDRESSING_TEST_ORDER="direct banks"
27	])
28	AC_ARG_WITH(esd, [ --with-esd support ESD for sound under Linux/FreeBSD [default=yes]], [WANT_ESD=$withval], [WANT_ESD=yes])
29	AC_ARG_WITH(gtk, [ --with-gtk use GTK user interface [default=yes]], [WANT_GTK=$withval], [WANT_GTK=yes])
30	AC_ARG_WITH(mon, [ --with-mon use mon as debugger [default=yes]], [WANT_MON=$withval], [WANT_MON=yes])
31
32	dnl Canonical system information.
33	AC_CANONICAL_HOST
34	AC_CANONICAL_TARGET
35
36	dnl Target OS type (target is host if not cross-compiling).
37	case "$target_os" in
38	linux*) OS_TYPE=linux;;
39	netbsd*) OS_TYPE=netbsd;;
40	freebsd*) OS_TYPE=freebsd;;
41	solaris*) OS_TYPE=solaris;;
42	*) OS_TYPE=`echo $target_os \| sed -e 's/-/_/'`;;
43	esac
44	DEFINES="$DEFINES -DOS_$OS_TYPE"
45
46	dnl Target CPU type.
47	HAVE_I386=no
48	HAVE_M68K=no
49	HAVE_SPARC=no
50	case "$target_cpu" in
51	i386* \| i486* \| i586* \| i686* \| i786* ) CPU_TYPE=i386 HAVE_I386=yes;;
52	m68k* ) CPU_TYPE=m68k HAVE_M68K=yes;;
53	sparc* ) CPU_TYPE=sparc HAVE_SPARC=yes;;
54	*) CPU_TYPE=`echo $target_cpu \| sed -e 's/-/_/'`;;
55	esac
56	DEFINES="$DEFINES -DCPU_$CPU_TYPE"
57
58	dnl Checks for programs.
59	AC_PROG_CC
60	AC_PROG_CC_C_O
61	AC_PROG_CPP
62	AC_PROG_CXX
63	AC_PROG_MAKE_SET
64	AC_PROG_INSTALL
65
66	dnl We use mon if possible.
67	MONSRCS=
68	if [[ "x$WANT_MON" = "xyes" ]]; then
69	AC_MSG_CHECKING(for mon)
70	mon_srcdir=../../../mon/src
71	if grep mon_init $mon_srcdir/mon.h >/dev/null 2>/dev/null; then
72	AC_MSG_RESULT(yes)
73	AC_DEFINE(ENABLE_MON)
74	MONSRCS="$mon_srcdir/mon.cpp $mon_srcdir/mon_6502.cpp $mon_srcdir/mon_8080.cpp $mon_srcdir/mon_cmd.cpp $mon_srcdir/mon_disass.cpp $mon_srcdir/mon_ppc.cpp $mon_srcdir/disass/floatformat.c $mon_srcdir/disass/i386-dis.c $mon_srcdir/disass/m68k-dis.c $mon_srcdir/disass/m68k-opc.c"
75	CXXFLAGS="$CXXFLAGS -I$mon_srcdir -I$mon_srcdir/disass"
76	AC_CHECK_LIB(readline, readline)
77	AC_CHECK_LIB(termcap, tputs)
78	AC_CHECK_HEADERS(readline.h history.h readline/readline.h readline/history.h)
79	else
80	AC_MSG_RESULT(no)
81	AC_MSG_WARN([Could not find mon, ignoring --with-mon.])
82	WANT_MON=no
83	fi
84	fi
85
86	dnl Checks for libraries.
87	AC_CHECK_LIB(posix4, sem_init)
88
89	dnl We need X11.
90	AC_PATH_XTRA
91	if [[ "x$no_x" = "xyes" ]]; then
92	AC_MSG_ERROR([You need X11 to run Basilisk II.])
93	fi
94	CFLAGS="$CFLAGS $X_CFLAGS"
95	CXXFLAGS="$CXXFLAGS $X_CFLAGS"
96	LIBS="$LIBS $X_PRE_LIBS $X_LIBS -lX11 -lXext $X_EXTRA_LIBS"
97
98	dnl We want pthreads. Try libpthread first, then libc_r (FreeBSD), then PTL.
99	HAVE_PTHREADS=yes
100	AC_CHECK_LIB(pthread, pthread_create, , [
101	AC_CHECK_LIB(c_r, pthread_create, , [
102	AC_CHECK_LIB(PTL, pthread_create, , [
103	HAVE_PTHREADS=no
104	])
105	])
106	])
107	if [[ "x$HAVE_PTHREADS" = "xyes" ]]; then
108	AC_DEFINE(HAVE_PTHREADS)
109	fi
110	AC_CHECK_FUNCS(pthread_cancel)
111
112	dnl If POSIX.4 semaphores are not available, we emulate them with pthread mutexes.
113	SEMSRC=
114	AC_CHECK_FUNCS(sem_init, , [
115	if test "x$HAVE_PTHREADS" = "xyes"; then
116	SEMSRC=posix_sem.cpp
117	fi
118	])
119
120	dnl We use DGA (XFree86 or fbdev) if possible.
121	if [[ "x$WANT_XF86_DGA" = "xyes" ]]; then
122	AC_CHECK_LIB(Xxf86dga, XF86DGAQueryExtension, [
123	AC_DEFINE(ENABLE_XF86_DGA)
124	LIBS="$LIBS -lXxf86dga"
125	if [[ "x$WANT_FBDEV_DGA" = "xyes" ]]; then
126	AC_MSG_WARN([Cannot have both --enable-xf86-dga and --enable-fbdev-dga, ignoring --enable-fbdev-dga.])
127	WANT_FBDEV_DGA=no
128	fi
129	], [
130	AC_MSG_WARN([Could not find XFree86 DGA extension, ignoring --enable-xf86-dga.])
131	WANT_XF86_DGA=no
132	])
133	fi
134	if [[ "x$WANT_FBDEV_DGA" = "xyes" ]]; then
135	AC_DEFINE(ENABLE_FBDEV_DGA)
136	fi
137
138	dnl We use XFree86 VidMode if possible.
139	if [[ "x$WANT_XF86_VIDMODE" = "xyes" ]]; then
140	AC_CHECK_LIB(Xxf86vm, XF86VidModeQueryExtension, [
141	AC_DEFINE(ENABLE_XF86_VIDMODE)
142	LIBS="$LIBS -lXxf86vm"
143	], [
144	AC_MSG_WARN([Could not find XFree86 VidMode extension, ignoring --enable-xf86-vidmode.])
145	WANT_XF86_VIDMODE=no
146	])
147	fi
148
149	dnl We use GTK+ if possible.
150	UISRCS=../dummy/prefs_editor_dummy.cpp
151	if [[ "x$WANT_GTK" = "xyes" ]]; then
152	AM_PATH_GTK(1.2.0, [
153	AC_DEFINE(ENABLE_GTK)
154	CFLAGS="$CFLAGS $GTK_CFLAGS"
155	CXXFLAGS="$CXXFLAGS $GTK_CFLAGS"
156	LIBS="$LIBS $GTK_LIBS"
157	UISRCS=prefs_editor_gtk.cpp
158	], [
159	AC_MSG_WARN([Could not find GTK+, disabling user interface.])
160	WANT_GTK=no
161	])
162	fi
163
164	dnl We use ESD if possible.
165	if [[ "x$WANT_ESD" = "xyes" ]]; then
166	AM_PATH_ESD(0.2.8, [
167	AC_DEFINE(ENABLE_ESD)
168	CFLAGS="$CFLAGS $ESD_CFLAGS"
169	CXXFLAGS="$CXXFLAGS $ESD_CFLAGS"
170	LIBS="$LIBS $ESD_LIBS"
171	], [
172	AC_MSG_WARN([Could not find ESD, disabling ESD support.])
173	WANT_ESD=no
174	])
175	fi
176
177	dnl Checks for header files.
178	AC_HEADER_STDC
179	AC_CHECK_HEADERS(unistd.h fcntl.h sys/time.h)
180
181	dnl Checks for typedefs, structures, and compiler characteristics.
182	AC_C_BIGENDIAN
183	AC_C_CONST
184	AC_C_INLINE
185	AC_CHECK_SIZEOF(short, 2)
186	AC_CHECK_SIZEOF(int, 4)
187	AC_CHECK_SIZEOF(long, 4)
188	AC_CHECK_SIZEOF(long long, 8)
189	AC_CHECK_SIZEOF(void *, 4)
190	AC_TYPE_OFF_T
191	AC_CHECK_TYPE(loff_t, off_t)
192	AC_TYPE_SIZE_T
193	AC_TYPE_SIGNAL
194	AC_HEADER_TIME
195	AC_STRUCT_TM
196
197	dnl Checks for library functions.
198	AC_CHECK_FUNCS(strdup cfmakeraw)
199	AC_CHECK_FUNCS(clock_gettime timer_create)
200
201	dnl Select system-dependant source files.
202	SERIALSRC=serial_unix.cpp
203	ETHERSRC=../dummy/ether_dummy.cpp
204	SCSISRC=../dummy/scsi_dummy.cpp
205	AUDIOSRC=../dummy/audio_dummy.cpp
206	EXTRASYSSRCS=
207	CAN_NATIVE_M68K=no
208	case "$target_os" in
209	linux*)
210	ETHERSRC=Linux/ether_linux.cpp
211	SCSISRC=Linux/scsi_linux.cpp
212	AUDIOSRC=audio_oss_esd.cpp
213	;;
214	freebsd3.)
215	AUDIOSRC=audio_oss_esd.cpp
216	DEFINES="$DEFINES -DBSD_COMP"
217	dnl Check for the CAM library
218	AC_CHECK_LIB(cam, cam_open_btl, HAVE_LIBCAM=yes, HAVE_LIBCAM=no)
219	if [[ "x$HAVE_LIBCAM" = "xno" ]]; then
220	AC_MSG_WARN([Cannot find libcam for SCSI management, disabling SCSI support.])
221	else
222	dnl Check for the sys kernel includes
223	AC_CHECK_HEADER(/sys/cam/cam.h)
224	if [[ "x$ac_cv_header__sys_cam_cam_h" = "xno" ]]; then
225	dnl In this case I should fix this thing including a "patch"
226	dnl to access directly to the functions in the kernel :) --Orlando
227	AC_MSG_WARN([Cannot find kernel includes for CAM library, disabling SCSI support.])
228	else
229	SCSISRC=FreeBSD/scsi_freebsd.cpp
230	CXXFLAGS="$CXXFLAGS -I/sys"
231	CFLAGS="$CFLAGS -I/sys"
232	LIBS="$LIBS -lcam"
233	DEFINES="$DEFINES -DCAM"
234	fi
235	fi
236	;;
237	freebsd*)
238	DEFINES="$DEFINES -DBSD_COMP"
239	dnl Check for the SCSI library
240	AC_CHECK_LIB(scsi, scsi_open, HAVE_LIBSCSI=yes, HAVE_LIBSCSI=no)
241	if [[ "x$HAVE_LIBSCSI" = "xno" ]]; then
242	AC_MSG_WARN([Cannot find libscsi for SCSI management, disabling SCSI support.])
243	else
244	dnl Check for the sys kernel includes
245	AC_CHECK_HEADER(scsi.h sys/scsiio.h)
246	if [[ "x$ac_cv_header_scsi_h" = "xno" ]]; then
247	AC_MSG_WARN([Cannot find includes for the SCSI library, disabling SCSI support.])
248	else
249	SCSISRC=FreeBSD/scsi_freebsd.cpp
250	LIBS="$LIBS -lscsi"
251	fi
252	fi
253	;;
254	netbsd*)
255	CAN_NATIVE_M68K=yes
256	;;
257	solaris*)
258	AUDIOSRC=Solaris/audio_solaris.cpp
259	DEFINES="$DEFINES -DBSD_COMP -D_POSIX_PTHREAD_SEMANTICS"
260	;;
261	irix*)
262	EXTRASYSSRCS=Irix/unaligned.c
263	DEFINES="$DEFINES -DCRTSCTS=CNEW_RTSCTS -DB230400=B115200"
264	LIBS="$LIBS -lm"
265	;;
266	esac
267
268	dnl Use 68k CPU natively?
269	WANT_NATIVE_M68K=no
270	if [[ "x$HAVE_M68K" = "xyes" -a "x$CAN_NATIVE_M68K" = "xyes" ]]; then
271	AC_DEFINE(ENABLE_NATIVE_M68K)
272	WANT_NATIVE_M68K=yes
273	fi
274
275	if [[ "x$HAVE_PTHREADS" = "xno" ]]; then
276	dnl Serial, ethernet and audio support needs pthreads
277	AC_MSG_WARN([You don't have pthreads, disabling serial, ethernet and audio support.])
278	SERIALSRC=../dummy/serial_dummy.cpp
279	ETHERSRC=../dummy/ether_dummy.cpp
280	AUDIOSRC=../dummy/audio_dummy.cpp
281	fi
282	SYSSRCS="$SERIALSRC $ETHERSRC $SCSISRC $AUDIOSRC $SEMSRC $UISRCS $MONSRCS $EXTRASYSSRCS"
283
284	dnl Define a macro that translates a yesno-variable into a C macro definition
285	dnl to be put into the config.h file
286	dnl $1 -- the macro to define
287	dnl $2 -- the value to translate
288	AC_DEFUN(AC_TRANSLATE_DEFINE, [
289	if [[ "x$2" = "xyes" ]]; then
290	AC_DEFINE($1)
291	fi
292	])
293
294	dnl Check if we can mmap 0x2000 bytes from 0x0000
295	AC_CACHE_CHECK("whether we can map Low Memory area 0x0000-0x2000",
296	ac_cv_can_map_lm, [
297	AC_LANG_SAVE
298	AC_LANG_CPLUSPLUS
299	AC_TRY_RUN([
300	#include <unistd.h>
301	#include <fcntl.h>
302	#include <sys/mman.h>
303
304	int main()
305	{ int zero_fd; char * lm;
306	if ((zero_fd = open("/dev/zero", O_RDWR)) < 0) exit(1);
307	if ((lm = (char *)mmap((caddr_t)0x0000, 0x2000, PROT_READ \| PROT_WRITE, MAP_FIXED \| MAP_PRIVATE, zero_fd, 0)) == MAP_FAILED) exit(1);
308	lm[0] = 0x12;
309	munmap(lm, 0x2000);
310	close(zero_fd);
311	exit(0);
312	}
313	],
314	[ac_cv_can_map_lm=yes],
315	[ac_cv_can_map_lm=no]
316	)
317	AC_LANG_RESTORE
318	]
319	)
320
321	dnl Check if extended signals are supported.
322	AC_CACHE_CHECK("whether your system supports extended signal handlers",
323	ac_cv_have_extended_signals, [
324	AC_LANG_SAVE
325	AC_LANG_CPLUSPLUS
326	AC_TRY_RUN([
327	#include <unistd.h>
328	#include <stdlib.h>
329	#include <signal.h>
330	#include <fcntl.h>
331	#include <sys/mman.h>
332
333	static volatile caddr_t mem = 0;
334	static int zero_fd = -1;
335
336	static RETSIGTYPE segfault_handler(int, siginfo_t * sip, void *)
337	{ if ((caddr_t)(sip->si_addr) != mem) exit(1);
338	munmap(mem, getpagesize()); close(zero_fd); exit(0); }
339
340	int main()
341	{ if ((zero_fd = open("/dev/zero", O_RDWR)) < 0) exit(1);
342	if ((mem = (caddr_t)mmap(0, getpagesize(), PROT_READ, MAP_PRIVATE, zero_fd, 0)) == (caddr_t)MAP_FAILED) exit(1);
343	struct sigaction sa; sa.sa_sigaction = segfault_handler; sa.sa_flags = SA_SIGINFO;
344	sigaction(SIGSEGV, &sa, 0);
345	mem[0] = 0;
346	exit(1); // should not be reached
347	}
348	],
349	[ac_cv_have_extended_signals=yes],
350	[ac_cv_have_extended_signals=no]
351	)
352	AC_LANG_RESTORE
353	]
354	)
355	AC_TRANSLATE_DEFINE(HAVE_SIGINFO_T, "$ac_cv_have_extended_signals")
356
357	dnl Otherwise, check for subterfuges.
358	if [[ "x$ac_cv_have_extended_signals" = "xno" ]]; then
359	case "$target_os" in
360	linux*)
361	if [[ "x$HAVE_I386" = "xyes" ]]; then
362	AC_CACHE_CHECK("whether we then have a subterfuge for your system",
363	ac_cv_have_sigcontext_hack, [
364	AC_LANG_SAVE
365	AC_LANG_CPLUSPLUS
366	AC_TRY_RUN([
367	#include <unistd.h>
368	#include <signal.h>
369	#include <fcntl.h>
370	#include <sys/mman.h>
371
372	static volatile caddr_t mem = 0;
373	static int zero_fd = -1;
374
375	static RETSIGTYPE segfault_handler(int, struct sigcontext scs)
376	{ if ((caddr_t)(scs.cr2) != mem) exit(1);
377	munmap(mem, getpagesize()); close(zero_fd); exit(0); }
378
379	int main()
380	{ if ((zero_fd = open("/dev/zero", O_RDWR)) < 0) exit(1);
381	if ((mem = (caddr_t)mmap(0, getpagesize(), PROT_READ, MAP_PRIVATE, zero_fd, 0)) == (caddr_t)MAP_FAILED) exit(1);
382	struct sigaction sa; sa.sa_flags = 0;
383	sa.sa_handler = (RETSIGTYPE (*)(int))segfault_handler;
384	sigaction(SIGSEGV, &sa, 0);
385	mem[0] = 0;
386	exit(1); // should not be reached
387	}
388	],
389	[ac_cv_have_sigcontext_hack=yes],
390	[ac_cv_have_sigcontext_hack=no]
391	)
392	AC_LANG_RESTORE
393	])
394	AC_TRANSLATE_DEFINE(HAVE_SIGCONTEXT_SUBTERFUGE, $ac_cv_have_sigcontext_hack)
395	fi
396	;;
397	netbsd*)
398	if [[ "x$HAVE_M68K" = "xyes" ]]; then
399	AC_CACHE_CHECK("whether we then have a subterfuge for your system",
400	ac_cv_have_sigcontext_hack, [
401	AC_LANG_SAVE
402	AC_LANG_CPLUSPLUS
403	AC_TRY_RUN([
404	#include <unistd.h>
405	#include <signal.h>
406	#include <fcntl.h>
407	#include <sys/mman.h>
408
409	static volatile caddr_t mem = 0;
410	static int zero_fd = -1;
411
412	static RETSIGTYPE segfault_handler(int, int code)
413	{ if ((caddr_t)code != mem) exit(1);
414	munmap(mem, getpagesize()); close(zero_fd); exit(0); }
415
416	int main()
417	{ if ((zero_fd = open("/dev/zero", O_RDWR)) < 0) exit(1);
418	if ((mem = (caddr_t)mmap(0, getpagesize(), PROT_READ, MAP_PRIVATE, zero_fd, 0)) == (caddr_t)MAP_FAILED) exit(1);
419	struct sigaction sa; sa.sa_flags = 0;
420	sa.sa_handler = (RETSIGTYPE (*)(int))segfault_handler;
421	sigaction(SIGSEGV, &sa, 0);
422	mem[0] = 0;
423	exit(1); // should not be reached
424	}
425	],
426	[ac_cv_have_sigcontext_hack=yes],
427	[ac_cv_have_sigcontext_hack=no]
428	)
429	AC_LANG_RESTORE
430	])
431	AC_TRANSLATE_DEFINE(HAVE_SIGCONTEXT_SUBTERFUGE, $ac_cv_have_sigcontext_hack)
432	fi
433	;;
434	esac
435	fi
436
437	dnl Can we do Video on SEGV Signals ?
438	CAN_VOSF=no
439	if [[ "$ac_cv_have_extended_signals" = "yes" -o "$ac_cv_have_sigcontext_hack" = "yes" ]]; then
440	CAN_VOSF=yes
441	fi
442
443	dnl Determine the addressing mode to use
444	if [[ "x$WANT_NATIVE_M68K" = "xyes" ]]; then
445	ADDRESSING_MODE="real"
446	else
447	ADDRESSING_MODE=""
448	AC_MSG_CHECKING([for the addressing mode to use])
449	for am in $ADDRESSING_TEST_ORDER; do
450	case $am in
451	real)
452	dnl Requires ability to mmap Low Memory globals.
453	if [[ "x$ac_cv_can_map_lm" = "xno" ]]; then
454	continue
455	fi
456	if [[ "x$ac_cv_c_bigendian" = "xyes" ]]; then
457	dnl Requires only VOSF if 16-bit vidmode enable
458	if [[ "x$WANT_16BIT_VIDMODE" = "xyes" ]]; then
459	if [[ "x$CAN_VOSF" = "xno" ]]; then
460	continue
461	fi
462	else
463	DEFINES="$DEFINES -DDISABLE_16BIT_VIDMODE"
464	fi
465	else
466	dnl Requires VOSF
467	if [[ "x$CAN_VOSF" = "xno" ]]; then
468	continue
469	fi
470	fi
471	dnl Real addressing will probably work
472	ADDRESSING_MODE="real"
473	WANT_VOSF=yes dnl we can use VOSF and we need it actually
474	DEFINES="$DEFINES -DREAL_ADDRESSING"
475	break
476	;;
477	direct)
478	dnl Requires VOSF
479	if [[ "x$CAN_VOSF" = "xyes" ]]; then
480	ADDRESSING_MODE="direct"
481	WANT_VOSF=yes dnl we can use VOSF and we need it actually
482	DEFINES="$DEFINES -DDIRECT_ADDRESSING"
483	break
484	fi
485	;;
486	banks)
487	dnl Default addressing mode
488	ADDRESSING_MODE="memory banks"
489	break
490	;;
491	*)
492	AC_MSG_ERROR([Internal configure.in script error for $am addressing mode])
493	esac
494	done
495	AC_MSG_RESULT($ADDRESSING_MODE)
496	if [[ "x$ADDRESSING_MODE" = "x" ]]; then
497	AC_MSG_WARN([Sorry, no suitable addressing mode in $ADDRESSING_TEST_ORDER])
498	ADDRESSING_MODE="memory banks"
499	fi
500	fi
501
502	dnl Since real and direct addressing modes automatically activate VOSF,
503	dnl I put this test here.
504	if [[ "x$WANT_VOSF" = "xyes" ]]; then
505	if [[ "x$CAN_VOSF" = "xno" ]]; then
506	AC_MSG_WARN([Sorry, your system does not support Video on SEGV signals])
507	WANT_VOSF=no
508	else
509	AC_DEFINE(ENABLE_VOSF)
510	fi
511	fi
512
513	dnl Check for GAS.
514	HAVE_GAS=no
515	AC_MSG_CHECKING(for GAS .p2align feature)
516	cat >conftest.S << EOF
517	.text
518	.p2align 5
519	EOF
520	if $CC conftest.S -c -o conftest.o >/dev/null 2>&1 ; then HAVE_GAS=yes; fi
521	AC_MSG_RESULT($HAVE_GAS)
522
523	dnl Check for GCC 2.7 or higher.
524	HAVE_GCC27=no
525	AC_MSG_CHECKING(for GCC 2.7 or higher)
526	AC_EGREP_CPP(yes,
527	[#if __GNUC__ - 1 > 1 \|\| __GNUC_MINOR__ - 1 > 5
528	yes
529	#endif
530	], [AC_MSG_RESULT(yes); HAVE_GCC27=yes], AC_MSG_RESULT(no))
531
532	dnl Set "-fomit-frame-pointer" on i386 GCC 2.7 or higher.
533	if [[ "x$HAVE_GCC27" = "xyes" -a "x$HAVE_I386" = "xyes" ]]; then
534	CFLAGS="$CFLAGS -fomit-frame-pointer"
535	CXXFLAGS="$CXXFLAGS -fomit-frame-pointer"
536	fi
537
538	dnl Select appropriate CPU source and REGPARAM define.
539	ASM_OPTIMIZATIONS=none
540	CPUSRCS="cpuemu1.cpp cpuemu2.cpp cpuemu3.cpp cpuemu4.cpp cpuemu5.cpp cpuemu6.cpp cpuemu7.cpp cpuemu8.cpp"
541	FPUSRCS="../uae_cpu/fpp.cpp"
542	if [[ "x$HAVE_GCC27" = "xyes" -a "x$HAVE_I386" = "xyes" ]]; then
543	dnl i386 CPU
544	DEFINES="$DEFINES -DREGPARAM=\"__attribute__((regparm(3)))\""
545	if [[ "x$HAVE_GAS" = "xyes" ]]; then
546	ASM_OPTIMIZATIONS=i386
547	DEFINES="$DEFINES -DX86_ASSEMBLY -DOPTFLAGS"
548	CPUSRCS="../uae_cpu/compiler.cpp cpufast1.s cpufast2.s cpufast3.s cpufast4.s cpufast5.s cpufast6.s cpufast7.s cpufast8.s"
549	FPUSRCS="../uae_cpu/fpu_x86.cpp"
550	fi
551	elif [[ "x$HAVE_GCC27" = "xyes" -a "x$HAVE_SPARC" = "xyes" -a "x$HAVE_GAS" = "xyes" ]]; then
552	dnl SPARC CPU
553	case "$target_os" in
554	solaris*)
555	AC_MSG_CHECKING(SPARC CPU architecture)
556	SPARC_TYPE=`Solaris/which_sparc`
557	AC_MSG_RESULT($SPARC_TYPE)
558	case "$SPARC_TYPE" in
559	SPARC_V8)
560	ASM_OPTIMIZATIONS="SPARC V8 architecture"
561	DEFINES="$DEFINES -DSPARC_V8_ASSEMBLY" dnl -DOPTFLAGS"
562	CFLAGS="$CFLAGS -Wa,-Av8"
563	CXXFLAGS="$CXXFLAGS -Wa,-Av8"
564	;;
565	SPARC_V9)
566	ASM_OPTIMIZATIONS="SPARC V9 architecture"
567	DEFINES="$DEFINES -DSPARC_V9_ASSEMBLY" dnl -DOPTFLAGS"
568	CFLAGS="$CFLAGS -Wa,-Av9"
569	CXXFLAGS="$CXXFLAGS -Wa,-Av9"
570	;;
571	esac
572	;;
573	esac
574	elif [[ "x$WANT_NATIVE_M68K" = "xyes" ]]; then
575	dnl Native m68k, no emulation
576	CPUINCLUDES="-I../native_cpu"
577	CPUSRCS="asm_support.s"
578	fi
579
580	dnl UAE CPU sources for all non-m68k-native architectures.
581	if [[ "x$WANT_NATIVE_M68K" = "xno" ]]; then
582	CPUINCLUDES="-I../uae_cpu"
583	CPUSRCS="../uae_cpu/basilisk_glue.cpp ../uae_cpu/memory.cpp ../uae_cpu/newcpu.cpp ../uae_cpu/readcpu.cpp $FPUSRCS cpustbl.cpp cpudefs.cpp $CPUSRCS"
584	fi
585
586	dnl Remove the "-g" option if set for GCC.
587	if [[ "x$HAVE_GCC27" = "xyes" ]]; then
588	dnl gb-- Probably not the cleanest way to take
589	CFLAGS=`echo $CFLAGS \| sed -e 's/ -g / /;s/^-g / /;s/ -g$/ /;s/^-g$//'`
590	CXXFLAGS=`echo $CXXFLAGS \| sed -e 's/ -g / /;s/^-g / /;s/ -g$/ /;s/^-g$//'`
591	fi
592
593	dnl Generate Makefile.
594	AC_SUBST(DEFINES)
595	AC_SUBST(SYSSRCS)
596	AC_SUBST(CPUINCLUDES)
597	AC_SUBST(CPUSRCS)
598	AC_OUTPUT(Makefile)
599
600	dnl Print summary.
601	echo
602	echo Basilisk II configuration summary:
603	echo
604	echo XFree86 DGA support .............. : $WANT_XF86_DGA
605	echo XFree86 VidMode support .......... : $WANT_XF86_VIDMODE
606	echo fbdev DGA support ................ : $WANT_FBDEV_DGA
607	echo Enable video on SEGV signals ..... : $WANT_VOSF
608	echo ESD sound support ................ : $WANT_ESD
609	echo GTK user interface ............... : $WANT_GTK
610	echo mon debugger support ............. : $WANT_MON
611	echo Running m68k code natively ....... : $WANT_NATIVE_M68K
612	echo Assembly optimizations ........... : $ASM_OPTIMIZATIONS
613	echo Addressing mode .................. : $ADDRESSING_MODE
614	echo
615	echo "Configuration done. Now type \"make\" (or \"gmake\")."