src/Unix/configure.in

dnl Process this file with autoconf to produce a configure script.
dnl Written in 2002 by Christian Bauer

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

dnl Options.
AC_ARG_ENABLE(ppc-emulator, [  --enable-ppc-emulator   use the selected PowerPC emulator [default=auto]], [WANT_EMULATED_PPC=$enableval], [WANT_EMULATED_PPC=auto])
AC_ARG_ENABLE(xf86-dga,     [  --enable-xf86-dga       use the XFree86 DGA extension [default=yes]], [WANT_XF86_DGA=$enableval], [WANT_XF86_DGA=yes])
AC_ARG_ENABLE(xf86-vidmode, [  --enable-xf86-vidmode   use the XFree86 VidMode extension [default=yes]], [WANT_XF86_VIDMODE=$enableval], [WANT_XF86_VIDMODE=yes])
AC_ARG_ENABLE(vosf,         [  --enable-vosf           enable video on SEGV signals [default=yes]], [WANT_VOSF=$enableval], [WANT_VOSF=yes])
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 Checks for programs.
AC_PROG_CC
AC_PROG_CPP
AC_PROG_CXX
AC_PROG_MAKE_SET
AC_PROG_INSTALL

dnl Check for PowerPC target CPU.
HAVE_PPC=no
AC_MSG_CHECKING(for PowerPC target CPU)
AC_EGREP_CPP(yes,
[
#ifdef __powerpc__
  yes
#endif
], [AC_MSG_RESULT(yes); HAVE_PPC=yes], AC_MSG_RESULT(no))

dnl We use native CPU if possible.
EMULATED_PPC=yes
case $WANT_EMULATED_PPC in
  auto) [[ "x$HAVE_PPC" = "xyes" ]] && EMULATED_PPC=no;;
  no)   EMULATED_PPC=no;;
esac
if [[ "x$EMULATED_PPC" = "xyes" ]]; then
  AC_DEFINE(EMULATED_PPC)
fi

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_z80.cpp $mon_srcdir/mon_cmd.cpp $mon_srcdir/mon_lowmem.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(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)
    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$no_x" = "xyes" ]]; then
  AC_MSG_ERROR([You need X11 to run SheepShaver.])
fi
CFLAGS="$CFLAGS $X_CFLAGS"
CXXFLAGS="$CXXFLAGS $X_CFLAGS"
LIBS="$LIBS $X_PRE_LIBS $X_LIBS -lX11 -lXext $X_EXTRA_LIBS"

dnl We need pthreads on non-PowerPC systems. Try libpthread first, then libc_r (FreeBSD), then PTL.
HAVE_PTHREADS=yes
if [[ "x$EMULATED_PPC" = "xyes" ]]; then
  AC_CHECK_LIB(pthread, pthread_create, , [
    AC_CHECK_LIB(c_r, pthread_create, , [
      AC_CHECK_LIB(PTL, pthread_create, , [
        AC_MSG_ERROR([You need pthreads to run Basilisk II.])
      ])
    ])
  ])
  AC_CHECK_FUNCS(pthread_cancel)
fi

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 XFree86 DGA if possible.
if [[ "x$WANT_XF86_DGA" = "xyes" ]]; then
  AC_CHECK_LIB(Xxf86dga, XF86DGAQueryExtension, [
    AC_DEFINE(ENABLE_XF86_DGA)
    LIBS="$LIBS -lXxf86dga"
  ], [
    AC_MSG_WARN([Could not find XFree86 DGA extension, ignoring --enable-xf86-dga.])
    WANT_XF86_DGA=no
  ])
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=
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_HEADER_SYS_WAIT
AC_CHECK_HEADERS(mach/vm_map.h mach/mach_init.h sys/mman.h)
AC_CHECK_HEADERS(sys/time.h sys/times.h)
AC_CHECK_HEADERS(unistd.h fcntl.h byteswap.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(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(nanosleep clock_gettime timer_create)
AC_CHECK_FUNCS(sigaction signal)
AC_CHECK_FUNCS(mmap mprotect munmap)
AC_CHECK_FUNCS(vm_allocate vm_deallocate vm_protect)

dnl Select system-dependant sources.
if [[ "x$EMULATED_PPC" = "xno" ]]; then
  SYSSRCS="Linux/paranoia.cpp Linux/sheepthreads.c Linux/asm_linux.S"
else
  SYSSRCS="../kpx_cpu/sheepshaver_glue.cpp \
        ../kpx_cpu/src/cpu/ppc/ppc-cpu.cpp \
        ../kpx_cpu/src/cpu/ppc/ppc-decode.cpp \
        ../kpx_cpu/src/cpu/ppc/ppc-execute.cpp"
  CPPFLAGS="$CPPFLAGS -I../kpx_cpu/include -I../kpx_cpu/src"
fi
SYSSRCS="$SYSSRCS $SEMSRCS $UISRCS $MONSRCS"

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 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 "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 "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 "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 "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 "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 "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 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 "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 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([
    #define HAVE_SIGINFO_T 1
    #define CONFIGURE_TEST_SIGSEGV_RECOVERY
    #include "vm_alloc.cpp"
    #include "sigsegv.cpp"
  ], 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.])

dnl Otherwise, check for subterfuges.
if [[ "x$ac_cv_have_extended_signals" = "xno" ]]; then
  AC_CACHE_CHECK([whether we then have a subterfuge for your system],
  ac_cv_have_sigcontext_hack, [
    AC_LANG_SAVE
    AC_LANG_CPLUSPLUS
    AC_TRY_RUN([
      #define HAVE_SIGCONTEXT_SUBTERFUGE 1
      #define CONFIGURE_TEST_SIGSEGV_RECOVERY
      #include "vm_alloc.cpp"
      #include "sigsegv.cpp"
    ], ac_cv_have_sigcontext_hack=yes, ac_cv_have_sigcontext_hack=no,
    dnl When cross-compiling, do not assume anything.
    ac_cv_have_sigcontext_hack=no
    )
    AC_LANG_RESTORE
  ])
  AC_TRANSLATE_DEFINE(HAVE_SIGCONTEXT_SUBTERFUGE, "$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 "vm_alloc.cpp"
    #include "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 [[ "$ac_cv_have_extended_signals" = "yes" -o "$ac_cv_have_sigcontext_hack" = "yes" ]]; then
  CAN_VOSF=yes
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 Generate Makefile.
AC_SUBST(SYSSRCS)
AC_OUTPUT(Makefile)

dnl Print summary.
echo
echo SheepShaver configuration summary:
echo
echo XFree86 DGA support .............. : $WANT_XF86_DGA
echo XFree86 VidMode support .......... : $WANT_XF86_VIDMODE
echo Using PowerPC emulator ........... : $EMULATED_PPC
echo Enable video on SEGV signals ..... : $WANT_VOSF
echo ESD sound support ................ : $WANT_ESD
echo GTK user interface ............... : $WANT_GTK
echo mon debugger support ............. : $WANT_MON
echo
echo "Configuration done. Now type \"make\"."
Revision:	1.7
Committed:	2003-09-14T22:11:42Z (21 years, 2 months ago) by gbeauche
Branch:	MAIN
Changes since 1.6:	+1 -1 lines
Log Message:	factor out -I usage
#	User	Rev	Content
1	cebix	1.1	dnl Process this file with autoconf to produce a configure script.
2			dnl Written in 2002 by Christian Bauer
3
4			AC_INIT(main_unix.cpp)
5			AC_PREREQ(2.12)
6			AC_CONFIG_HEADER(config.h)
7
8			dnl Options.
9	gbeauche	1.6	AC_ARG_ENABLE(ppc-emulator, [ --enable-ppc-emulator use the selected PowerPC emulator [default=auto]], [WANT_EMULATED_PPC=$enableval], [WANT_EMULATED_PPC=auto])
10	cebix	1.1	AC_ARG_ENABLE(xf86-dga, [ --enable-xf86-dga use the XFree86 DGA extension [default=yes]], [WANT_XF86_DGA=$enableval], [WANT_XF86_DGA=yes])
11			AC_ARG_ENABLE(xf86-vidmode, [ --enable-xf86-vidmode use the XFree86 VidMode extension [default=yes]], [WANT_XF86_VIDMODE=$enableval], [WANT_XF86_VIDMODE=yes])
12	gbeauche	1.5	AC_ARG_ENABLE(vosf, [ --enable-vosf enable video on SEGV signals [default=yes]], [WANT_VOSF=$enableval], [WANT_VOSF=yes])
13	cebix	1.1	AC_ARG_WITH(esd, [ --with-esd support ESD for sound under Linux/FreeBSD [default=yes]], [WANT_ESD=$withval], [WANT_ESD=yes])
14			AC_ARG_WITH(gtk, [ --with-gtk use GTK user interface [default=yes]], [WANT_GTK=$withval], [WANT_GTK=yes])
15			AC_ARG_WITH(mon, [ --with-mon use mon as debugger [default=yes]], [WANT_MON=$withval], [WANT_MON=yes])
16
17			dnl Checks for programs.
18			AC_PROG_CC
19			AC_PROG_CPP
20			AC_PROG_CXX
21			AC_PROG_MAKE_SET
22			AC_PROG_INSTALL
23
24			dnl Check for PowerPC target CPU.
25			HAVE_PPC=no
26			AC_MSG_CHECKING(for PowerPC target CPU)
27			AC_EGREP_CPP(yes,
28			[
29			#ifdef __powerpc__
30			yes
31			#endif
32			], [AC_MSG_RESULT(yes); HAVE_PPC=yes], AC_MSG_RESULT(no))
33
34	gbeauche	1.6	dnl We use native CPU if possible.
35			EMULATED_PPC=yes
36			case $WANT_EMULATED_PPC in
37			auto) [[ "x$HAVE_PPC" = "xyes" ]] && EMULATED_PPC=no;;
38			no) EMULATED_PPC=no;;
39			esac
40			if [[ "x$EMULATED_PPC" = "xyes" ]]; then
41			AC_DEFINE(EMULATED_PPC)
42			fi
43
44	cebix	1.1	dnl We use mon if possible.
45			MONSRCS=
46			if [[ "x$WANT_MON" = "xyes" ]]; then
47			AC_MSG_CHECKING(for mon)
48			mon_srcdir=../../../mon/src
49			if grep mon_init $mon_srcdir/mon.h >/dev/null 2>/dev/null; then
50			AC_MSG_RESULT(yes)
51			AC_DEFINE(ENABLE_MON)
52			MONSRCS="$mon_srcdir/mon.cpp $mon_srcdir/mon_6502.cpp $mon_srcdir/mon_z80.cpp $mon_srcdir/mon_cmd.cpp $mon_srcdir/mon_lowmem.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 $mon_srcdir/disass/m68k-opc.c"
53			CXXFLAGS="$CXXFLAGS -I$mon_srcdir -I$mon_srcdir/disass"
54	gbeauche	1.2	AC_CHECK_LIB(ncurses, tgetent, ,
55			AC_CHECK_LIB(termcap, tgetent, ,
56			AC_CHECK_LIB(termlib, tgetent, ,
57			AC_CHECK_LIB(terminfo, tgetent, ,
58			AC_CHECK_LIB(Hcurses, tgetent, ,
59			AC_CHECK_LIB(curses, tgetent))))))
60	cebix	1.1	AC_CHECK_LIB(readline, readline)
61			AC_CHECK_HEADERS(readline.h history.h readline/readline.h readline/history.h)
62			else
63			AC_MSG_RESULT(no)
64			AC_MSG_WARN([Could not find mon, ignoring --with-mon.])
65			WANT_MON=no
66			fi
67			fi
68
69			dnl Checks for libraries.
70			AC_CHECK_LIB(posix4, sem_init)
71
72			dnl We need X11.
73			AC_PATH_XTRA
74			if [[ "x$no_x" = "xyes" ]]; then
75			AC_MSG_ERROR([You need X11 to run SheepShaver.])
76			fi
77			CFLAGS="$CFLAGS $X_CFLAGS"
78			CXXFLAGS="$CXXFLAGS $X_CFLAGS"
79			LIBS="$LIBS $X_PRE_LIBS $X_LIBS -lX11 -lXext $X_EXTRA_LIBS"
80
81			dnl We need pthreads on non-PowerPC systems. Try libpthread first, then libc_r (FreeBSD), then PTL.
82			HAVE_PTHREADS=yes
83	gbeauche	1.6	if [[ "x$EMULATED_PPC" = "xyes" ]]; then
84	cebix	1.1	AC_CHECK_LIB(pthread, pthread_create, , [
85			AC_CHECK_LIB(c_r, pthread_create, , [
86			AC_CHECK_LIB(PTL, pthread_create, , [
87			AC_MSG_ERROR([You need pthreads to run Basilisk II.])
88			])
89			])
90			])
91			AC_CHECK_FUNCS(pthread_cancel)
92			fi
93
94			dnl If POSIX.4 semaphores are not available, we emulate them with pthread mutexes.
95			SEMSRC=
96			AC_CHECK_FUNCS(sem_init, , [
97	gbeauche	1.4	if test "x$HAVE_PTHREADS" = "xyes"; then
98	cebix	1.1	SEMSRC=posix_sem.cpp
99			fi
100			])
101
102			dnl We use XFree86 DGA if possible.
103			if [[ "x$WANT_XF86_DGA" = "xyes" ]]; then
104			AC_CHECK_LIB(Xxf86dga, XF86DGAQueryExtension, [
105			AC_DEFINE(ENABLE_XF86_DGA)
106			LIBS="$LIBS -lXxf86dga"
107			], [
108			AC_MSG_WARN([Could not find XFree86 DGA extension, ignoring --enable-xf86-dga.])
109			WANT_XF86_DGA=no
110			])
111			fi
112
113			dnl We use XFree86 VidMode if possible.
114			if [[ "x$WANT_XF86_VIDMODE" = "xyes" ]]; then
115			AC_CHECK_LIB(Xxf86vm, XF86VidModeQueryExtension, [
116			AC_DEFINE(ENABLE_XF86_VIDMODE)
117			LIBS="$LIBS -lXxf86vm"
118			], [
119			AC_MSG_WARN([Could not find XFree86 VidMode extension, ignoring --enable-xf86-vidmode.])
120			WANT_XF86_VIDMODE=no
121			])
122			fi
123
124			dnl We use GTK+ if possible.
125			UISRCS=
126			if [[ "x$WANT_GTK" = "xyes" ]]; then
127			AM_PATH_GTK(1.2.0, [
128			AC_DEFINE(ENABLE_GTK)
129			CFLAGS="$CFLAGS $GTK_CFLAGS"
130			CXXFLAGS="$CXXFLAGS $GTK_CFLAGS"
131			LIBS="$LIBS $GTK_LIBS"
132			UISRCS=prefs_editor_gtk.cpp
133			], [
134			AC_MSG_WARN([Could not find GTK+, disabling user interface.])
135			WANT_GTK=no
136			])
137			fi
138
139			dnl We use ESD if possible.
140			if [[ "x$WANT_ESD" = "xyes" ]]; then
141			AM_PATH_ESD(0.2.8, [
142			AC_DEFINE(ENABLE_ESD)
143			CFLAGS="$CFLAGS $ESD_CFLAGS"
144			CXXFLAGS="$CXXFLAGS $ESD_CFLAGS"
145			LIBS="$LIBS $ESD_LIBS"
146			], [
147			AC_MSG_WARN([Could not find ESD, disabling ESD support.])
148			WANT_ESD=no
149			])
150			fi
151
152			dnl Checks for header files.
153			AC_HEADER_STDC
154			AC_HEADER_SYS_WAIT
155	gbeauche	1.6	AC_CHECK_HEADERS(mach/vm_map.h mach/mach_init.h sys/mman.h)
156			AC_CHECK_HEADERS(sys/time.h sys/times.h)
157			AC_CHECK_HEADERS(unistd.h fcntl.h byteswap.h)
158	cebix	1.1
159			dnl Checks for typedefs, structures, and compiler characteristics.
160			AC_C_BIGENDIAN
161			AC_C_CONST
162			AC_C_INLINE
163			AC_CHECK_SIZEOF(short, 2)
164			AC_CHECK_SIZEOF(int, 4)
165			AC_CHECK_SIZEOF(long, 4)
166			AC_CHECK_SIZEOF(long long, 8)
167	gbeauche	1.4	AC_CHECK_SIZEOF(float, 4)
168			AC_CHECK_SIZEOF(double, 8)
169	gbeauche	1.3	AC_CHECK_SIZEOF(void *, 4)
170	cebix	1.1	AC_TYPE_OFF_T
171			AC_CHECK_TYPE(loff_t, off_t)
172			AC_TYPE_SIZE_T
173	gbeauche	1.4	AC_TYPE_SIGNAL
174	cebix	1.1	AC_HEADER_TIME
175			AC_STRUCT_TM
176
177			dnl Checks for library functions.
178			AC_CHECK_FUNCS(strdup cfmakeraw)
179			AC_CHECK_FUNCS(nanosleep clock_gettime timer_create)
180	gbeauche	1.4	AC_CHECK_FUNCS(sigaction signal)
181			AC_CHECK_FUNCS(mmap mprotect munmap)
182			AC_CHECK_FUNCS(vm_allocate vm_deallocate vm_protect)
183	cebix	1.1
184			dnl Select system-dependant sources.
185	gbeauche	1.6	if [[ "x$EMULATED_PPC" = "xno" ]]; then
186	cebix	1.1	SYSSRCS="Linux/paranoia.cpp Linux/sheepthreads.c Linux/asm_linux.S"
187			else
188	gbeauche	1.6	SYSSRCS="../kpx_cpu/sheepshaver_glue.cpp \
189			../kpx_cpu/src/cpu/ppc/ppc-cpu.cpp \
190			../kpx_cpu/src/cpu/ppc/ppc-decode.cpp \
191			../kpx_cpu/src/cpu/ppc/ppc-execute.cpp"
192	gbeauche	1.7	CPPFLAGS="$CPPFLAGS -I../kpx_cpu/include -I../kpx_cpu/src"
193	cebix	1.1	fi
194			SYSSRCS="$SYSSRCS $SEMSRCS $UISRCS $MONSRCS"
195	gbeauche	1.4
196			dnl Define a macro that translates a yesno-variable into a C macro definition
197			dnl to be put into the config.h file
198			dnl $1 -- the macro to define
199			dnl $2 -- the value to translate
200			dnl $3 -- template name
201			AC_DEFUN(AC_TRANSLATE_DEFINE, [
202			if [[ "x$2" = "xyes" -o "x$2" = "xguessing yes" ]]; then
203			AC_DEFINE($1, 1, $3)
204			fi
205			])
206
207			dnl Various checks if the system supports vm_allocate() and the like functions.
208			have_mach_vm=no
209			if [[ "x$ac_cv_func_vm_allocate" = "xyes" -a "x$ac_cv_func_vm_deallocate" = "xyes" -a \
210			"x$ac_cv_func_vm_protect" = "xyes" ]]; then
211			have_mach_vm=yes
212			fi
213			AC_TRANSLATE_DEFINE(HAVE_MACH_VM, "$have_mach_vm",
214			[Define if your system has a working vm_allocate()-based memory allocator.])
215
216			dnl Check that vm_allocate(), vm_protect() work
217			if [[ "x$have_mach_vm" = "xyes" ]]; then
218
219			AC_CACHE_CHECK([whether vm_protect works],
220			ac_cv_vm_protect_works, [
221			AC_LANG_SAVE
222			AC_LANG_CPLUSPLUS
223			ac_cv_vm_protect_works=yes
224			dnl First the tests that should segfault
225			for test_def in NONE_READ NONE_WRITE READ_WRITE; do
226			AC_TRY_RUN([
227			#define CONFIGURE_TEST_VM_MAP
228			#define TEST_VM_PROT_$test_def
229			#include "vm_alloc.cpp"
230			], ac_cv_vm_protect_works=no, rm -f core,
231			dnl When cross-compiling, do not assume anything
232			ac_cv_vm_protect_works="guessing no"
233			)
234			done
235			AC_TRY_RUN([
236			#define CONFIGURE_TEST_VM_MAP
237			#define TEST_VM_PROT_RDWR_WRITE
238			#include "vm_alloc.cpp"
239			], , ac_cv_vm_protect_works=no,
240			dnl When cross-compiling, do not assume anything
241			ac_cv_vm_protect_works="guessing no"
242			)
243			AC_LANG_RESTORE
244			]
245			)
246
247			dnl Remove support for vm_allocate() if vm_protect() does not work
248			if [[ "x$have_mach_vm" = "xyes" ]]; then
249			case $ac_cv_vm_protect_works in
250			*yes) have_mach_vm=yes;;
251			*no) have_mach_vm=no;;
252			esac
253			fi
254			AC_TRANSLATE_DEFINE(HAVE_MACH_VM, "$have_mach_vm",
255			[Define if your system has a working vm_allocate()-based memory allocator.])
256
257			fi dnl HAVE_MACH_VM
258
259			dnl Various checks if the system supports mmap() and the like functions.
260			dnl ... and Mach memory allocators are not supported
261			have_mmap_vm=no
262			if [[ "x$ac_cv_func_mmap" = "xyes" -a "x$ac_cv_func_munmap" = "xyes" -a \
263			"x$ac_cv_func_mprotect" = "xyes" ]]; then
264			if [[ "x$have_mach_vm" = "xno" ]]; then
265			have_mmap_vm=yes
266			fi
267			fi
268			AC_TRANSLATE_DEFINE(HAVE_MMAP_VM, "$have_mmap_vm",
269			[Define if your system has a working mmap()-based memory allocator.])
270
271			dnl Check that mmap() and associated functions work.
272			if [[ "x$have_mmap_vm" = "xyes" ]]; then
273
274			dnl Check if we have a working anonymous mmap()
275			AC_CACHE_CHECK([whether mmap supports MAP_ANON],
276			ac_cv_mmap_anon, [
277			AC_LANG_SAVE
278			AC_LANG_CPLUSPLUS
279			AC_TRY_RUN([
280			#define HAVE_MMAP_ANON
281			#define CONFIGURE_TEST_VM_MAP
282			#define TEST_VM_MMAP_ANON
283			#include "vm_alloc.cpp"
284			], ac_cv_mmap_anon=yes, ac_cv_mmap_anon=no,
285			dnl When cross-compiling, do not assume anything.
286			ac_cv_mmap_anon="guessing no"
287			)
288			AC_LANG_RESTORE
289			]
290			)
291			AC_TRANSLATE_DEFINE(HAVE_MMAP_ANON, "$ac_cv_mmap_anon",
292			[Define if <sys/mman.h> defines MAP_ANON and mmap()'ing with MAP_ANON works.])
293
294			AC_CACHE_CHECK([whether mmap supports MAP_ANONYMOUS],
295			ac_cv_mmap_anonymous, [
296			AC_LANG_SAVE
297			AC_LANG_CPLUSPLUS
298			AC_TRY_RUN([
299			#define HAVE_MMAP_ANONYMOUS
300			#define CONFIGURE_TEST_VM_MAP
301			#define TEST_VM_MMAP_ANON
302			#include "vm_alloc.cpp"
303			], ac_cv_mmap_anonymous=yes, ac_cv_mmap_anonymous=no,
304			dnl When cross-compiling, do not assume anything.
305			ac_cv_mmap_anonymous="guessing no"
306			)
307			AC_LANG_RESTORE
308			]
309			)
310			AC_TRANSLATE_DEFINE(HAVE_MMAP_ANONYMOUS, "$ac_cv_mmap_anonymous",
311			[Define if <sys/mman.h> defines MAP_ANONYMOUS and mmap()'ing with MAP_ANONYMOUS works.])
312
313			AC_CACHE_CHECK([whether mprotect works],
314			ac_cv_mprotect_works, [
315			AC_LANG_SAVE
316			AC_LANG_CPLUSPLUS
317			ac_cv_mprotect_works=yes
318			dnl First the tests that should segfault
319			for test_def in NONE_READ NONE_WRITE READ_WRITE; do
320			AC_TRY_RUN([
321			#define CONFIGURE_TEST_VM_MAP
322			#define TEST_VM_PROT_$test_def
323			#include "vm_alloc.cpp"
324			], ac_cv_mprotect_works=no, rm -f core,
325			dnl When cross-compiling, do not assume anything
326			ac_cv_mprotect_works="guessing no"
327			)
328			done
329			AC_TRY_RUN([
330			#define CONFIGURE_TEST_VM_MAP
331			#define TEST_VM_PROT_RDWR_WRITE
332			#include "vm_alloc.cpp"
333			], , ac_cv_mprotect_works=no,
334			dnl When cross-compiling, do not assume anything
335			ac_cv_mprotect_works="guessing no"
336			)
337			AC_LANG_RESTORE
338			]
339			)
340
341			dnl Remove support for mmap() if mprotect() does not work
342			if [[ "x$have_mmap_vm" = "xyes" ]]; then
343			case $ac_cv_mprotect_works in
344			*yes) have_mmap_vm=yes;;
345			*no) have_mmap_vm=no;;
346			esac
347			fi
348			AC_TRANSLATE_DEFINE(HAVE_MMAP_VM, $have_mmap_vm,
349			[Define if your system has a working mmap()-based memory allocator.])
350
351			fi dnl HAVE_MMAP_VM
352
353			dnl Check if we can mmap 0x2000 bytes from 0x0000
354			AC_CACHE_CHECK([whether we can map Low Memory area 0x0000-0x2000],
355			ac_cv_can_map_lm, [
356			AC_LANG_SAVE
357			AC_LANG_CPLUSPLUS
358			AC_TRY_RUN([
359			#include "vm_alloc.cpp"
360			int main(void) { /* returns 0 if we could map the lowmem globals */
361			volatile char * lm = 0;
362			if (vm_init() < 0) exit(1);
363			if (vm_acquire_fixed(0, 0x2000) < 0) exit(1);
364			lm[0] = 'z';
365			if (vm_release((char *)lm, 0x2000) < 0) exit(1);
366			vm_exit(); exit(0);
367			}
368			], ac_cv_can_map_lm=yes, ac_cv_can_map_lm=no,
369			dnl When cross-compiling, do not assume anything.
370			ac_cv_can_map_lm="guessing no"
371			)
372			AC_LANG_RESTORE
373			]
374			)
375
376			dnl Check signal handlers need to be reinstalled
377			AC_CACHE_CHECK([whether signal handlers need to be reinstalled],
378			ac_cv_signal_need_reinstall, [
379			AC_LANG_SAVE
380			AC_LANG_CPLUSPLUS
381			AC_TRY_RUN([
382			#include <stdlib.h>
383			#ifdef HAVE_UNISTD_H
384			#include <unistd.h>
385			#endif
386			#include <signal.h>
387			static int handled_signal = 0;
388			RETSIGTYPE sigusr1_handler(int) { handled_signal++; }
389			int main(void) { /* returns 0 if signals need not to be reinstalled */
390			signal(SIGUSR1, sigusr1_handler); raise(SIGUSR1); raise(SIGUSR1);
391			exit(handled_signal == 2);
392			}
393			], ac_cv_signal_need_reinstall=yes, ac_cv_signal_need_reinstall=no,
394			dnl When cross-compiling, do not assume anything.
395			ac_cv_signal_need_reinstall="guessing yes"
396			)
397			AC_LANG_RESTORE
398			]
399			)
400			AC_TRANSLATE_DEFINE(SIGNAL_NEED_REINSTALL, "$ac_cv_signal_need_reinstall",
401			[Define if your system requires signals to be reinstalled.])
402
403			dnl Check if sigaction handlers need to be reinstalled
404			AC_CACHE_CHECK([whether sigaction handlers need to be reinstalled],
405			ac_cv_sigaction_need_reinstall, [
406			AC_LANG_SAVE
407			AC_LANG_CPLUSPLUS
408			AC_TRY_RUN([
409			#include <stdlib.h>
410			#ifdef HAVE_UNISTD_H
411			#include <unistd.h>
412			#endif
413			#include <signal.h>
414			static int handled_signal = 0;
415			RETSIGTYPE sigusr1_handler(int) { handled_signal++; }
416			typedef RETSIGTYPE (*signal_handler)(int);
417			static signal_handler mysignal(int sig, signal_handler handler) {
418			struct sigaction old_sa;
419			struct sigaction new_sa;
420			new_sa.sa_handler = handler;
421			return ((sigaction(sig,&new_sa,&old_sa) < 0) ? SIG_IGN : old_sa.sa_handler);
422			}
423			int main(void) { /* returns 0 if signals need not to be reinstalled */
424			mysignal(SIGUSR1, sigusr1_handler); raise(SIGUSR1); raise(SIGUSR1);
425			exit(handled_signal == 2);
426			}
427			], ac_cv_sigaction_need_reinstall=yes, ac_cv_sigaction_need_reinstall=no,
428			dnl When cross-compiling, do not assume anything.
429			ac_cv_sigaction_need_reinstall="guessing yes"
430			)
431			AC_LANG_RESTORE
432			]
433			)
434			AC_TRANSLATE_DEFINE(SIGACTION_NEED_REINSTALL, "$ac_cv_sigaction_need_reinstall",
435			[Define if your system requires sigactions to be reinstalled.])
436
437			dnl Check if extended signals are supported.
438			AC_CACHE_CHECK([whether your system supports extended signal handlers],
439			ac_cv_have_extended_signals, [
440			AC_LANG_SAVE
441			AC_LANG_CPLUSPLUS
442			AC_TRY_RUN([
443			#define HAVE_SIGINFO_T 1
444			#define CONFIGURE_TEST_SIGSEGV_RECOVERY
445			#include "vm_alloc.cpp"
446			#include "sigsegv.cpp"
447			], ac_cv_have_extended_signals=yes, ac_cv_have_extended_signals=no,
448			dnl When cross-compiling, do not assume anything.
449			ac_cv_have_extended_signals=no
450			)
451			AC_LANG_RESTORE
452			]
453			)
454			AC_TRANSLATE_DEFINE(HAVE_SIGINFO_T, "$ac_cv_have_extended_signals",
455			[Define if your system support extended signals.])
456
457			dnl Otherwise, check for subterfuges.
458			if [[ "x$ac_cv_have_extended_signals" = "xno" ]]; then
459			AC_CACHE_CHECK([whether we then have a subterfuge for your system],
460			ac_cv_have_sigcontext_hack, [
461			AC_LANG_SAVE
462			AC_LANG_CPLUSPLUS
463			AC_TRY_RUN([
464			#define HAVE_SIGCONTEXT_SUBTERFUGE 1
465			#define CONFIGURE_TEST_SIGSEGV_RECOVERY
466			#include "vm_alloc.cpp"
467			#include "sigsegv.cpp"
468			], ac_cv_have_sigcontext_hack=yes, ac_cv_have_sigcontext_hack=no,
469			dnl When cross-compiling, do not assume anything.
470			ac_cv_have_sigcontext_hack=no
471			)
472			AC_LANG_RESTORE
473			])
474			AC_TRANSLATE_DEFINE(HAVE_SIGCONTEXT_SUBTERFUGE, "$ac_cv_have_sigcontext_hack",
475			[Define if we know a hack to replace siginfo_t->si_addr member.])
476			fi
477
478			dnl Check if we can ignore the fault (instruction skipping in SIGSEGV handler)
479			AC_CACHE_CHECK([whether we can skip instruction in SIGSEGV handler],
480			ac_cv_have_skip_instruction, [
481			AC_LANG_SAVE
482			AC_LANG_CPLUSPLUS
483			AC_TRY_RUN([
484			#define HAVE_SIGSEGV_SKIP_INSTRUCTION 1
485			#define CONFIGURE_TEST_SIGSEGV_RECOVERY
486			#include "vm_alloc.cpp"
487			#include "sigsegv.cpp"
488			], ac_cv_have_skip_instruction=yes, ac_cv_have_skip_instruction=no,
489			dnl When cross-compiling, do not assume anything.
490			ac_cv_have_skip_instruction=no
491			)
492			AC_LANG_RESTORE
493			]
494			)
495			AC_TRANSLATE_DEFINE(HAVE_SIGSEGV_SKIP_INSTRUCTION, "$ac_cv_have_skip_instruction",
496			[Define if we can ignore the fault (instruction skipping in SIGSEGV handler).])
497	cebix	1.1
498	gbeauche	1.5	dnl Can we do Video on SEGV Signals ?
499			CAN_VOSF=no
500			if [[ "$ac_cv_have_extended_signals" = "yes" -o "$ac_cv_have_sigcontext_hack" = "yes" ]]; then
501			CAN_VOSF=yes
502			fi
503
504			dnl Enable VOSF screen updates with this feature is requested and feasible
505			if [[ "x$WANT_VOSF" = "xyes" -a "x$CAN_VOSF" = "xyes" ]]; then
506			AC_DEFINE(ENABLE_VOSF, 1, [Define if using video enabled on SEGV signals.])
507			else
508			WANT_VOSF=no
509			fi
510
511	cebix	1.1	dnl Generate Makefile.
512			AC_SUBST(SYSSRCS)
513			AC_OUTPUT(Makefile)
514
515			dnl Print summary.
516			echo
517			echo SheepShaver configuration summary:
518			echo
519			echo XFree86 DGA support .............. : $WANT_XF86_DGA
520			echo XFree86 VidMode support .......... : $WANT_XF86_VIDMODE
521	gbeauche	1.6	echo Using PowerPC emulator ........... : $EMULATED_PPC
522	gbeauche	1.5	echo Enable video on SEGV signals ..... : $WANT_VOSF
523	cebix	1.1	echo ESD sound support ................ : $WANT_ESD
524			echo GTK user interface ............... : $WANT_GTK
525			echo mon debugger support ............. : $WANT_MON
526			echo
527			echo "Configuration done. Now type \"make\"."