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(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 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$HAVE_PPC" = "xno" ]]; 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(unistd.h fcntl.h sys/time.h sys/mman.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$HAVE_PPC" = "xyes" ]]; then
  SYSSRCS="Linux/paranoia.cpp Linux/sheepthreads.c Linux/asm_linux.S"
else
  SYSSRCS="../emul_ppc/emul_ppc.cpp"
fi
SYSSRCS="$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 Enable video on SEGV signals ..... : $WANT_VOSF
echo ESD sound support ................ : $WANT_ESD
echo GTK user interface ............... : $WANT_GTK
echo mon debugger support ............. : $WANT_MON
echo
echo "Configuration done. Now type \"make\"."
Revision:	1.5
Committed:	2003-05-22T22:12:04Z (21 years, 6 months ago) by gbeauche
Branch:	MAIN
Changes since 1.4:	+15 -0 lines
Log Message:	Import VOSF from Basilisk II for faster and more accurate video refresh. There may be some bugs left though. Rework sigsegv_handler() a little to accomodate VOSF way of life. TODO: merge video drivers infrastructure from B2.
#	Content
1	dnl Process this file with autoconf to produce a configure script.
2	dnl Written in 2002 by Christian Bauer
3
4	AC_INIT(main_unix.cpp)
5	AC_PREREQ(2.12)
6	AC_CONFIG_HEADER(config.h)
7
8	dnl Options.
9	AC_ARG_ENABLE(xf86-dga, [ --enable-xf86-dga use the XFree86 DGA extension [default=yes]], [WANT_XF86_DGA=$enableval], [WANT_XF86_DGA=yes])
10	AC_ARG_ENABLE(xf86-vidmode, [ --enable-xf86-vidmode use the XFree86 VidMode extension [default=yes]], [WANT_XF86_VIDMODE=$enableval], [WANT_XF86_VIDMODE=yes])
11	AC_ARG_ENABLE(vosf, [ --enable-vosf enable video on SEGV signals [default=yes]], [WANT_VOSF=$enableval], [WANT_VOSF=yes])
12	AC_ARG_WITH(esd, [ --with-esd support ESD for sound under Linux/FreeBSD [default=yes]], [WANT_ESD=$withval], [WANT_ESD=yes])
13	AC_ARG_WITH(gtk, [ --with-gtk use GTK user interface [default=yes]], [WANT_GTK=$withval], [WANT_GTK=yes])
14	AC_ARG_WITH(mon, [ --with-mon use mon as debugger [default=yes]], [WANT_MON=$withval], [WANT_MON=yes])
15
16	dnl Checks for programs.
17	AC_PROG_CC
18	AC_PROG_CPP
19	AC_PROG_CXX
20	AC_PROG_MAKE_SET
21	AC_PROG_INSTALL
22
23	dnl Check for PowerPC target CPU.
24	HAVE_PPC=no
25	AC_MSG_CHECKING(for PowerPC target CPU)
26	AC_EGREP_CPP(yes,
27	[
28	#ifdef __powerpc__
29	yes
30	#endif
31	], [AC_MSG_RESULT(yes); HAVE_PPC=yes], AC_MSG_RESULT(no))
32
33	dnl We use mon if possible.
34	MONSRCS=
35	if [[ "x$WANT_MON" = "xyes" ]]; then
36	AC_MSG_CHECKING(for mon)
37	mon_srcdir=../../../mon/src
38	if grep mon_init $mon_srcdir/mon.h >/dev/null 2>/dev/null; then
39	AC_MSG_RESULT(yes)
40	AC_DEFINE(ENABLE_MON)
41	MONSRCS="$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 $mon_srcdir/disass/m68k-opc.c"
42	CXXFLAGS="$CXXFLAGS -I$mon_srcdir -I$mon_srcdir/disass"
43	AC_CHECK_LIB(ncurses, tgetent, ,
44	AC_CHECK_LIB(termcap, tgetent, ,
45	AC_CHECK_LIB(termlib, tgetent, ,
46	AC_CHECK_LIB(terminfo, tgetent, ,
47	AC_CHECK_LIB(Hcurses, tgetent, ,
48	AC_CHECK_LIB(curses, tgetent))))))
49	AC_CHECK_LIB(readline, readline)
50	AC_CHECK_HEADERS(readline.h history.h readline/readline.h readline/history.h)
51	else
52	AC_MSG_RESULT(no)
53	AC_MSG_WARN([Could not find mon, ignoring --with-mon.])
54	WANT_MON=no
55	fi
56	fi
57
58	dnl Checks for libraries.
59	AC_CHECK_LIB(posix4, sem_init)
60
61	dnl We need X11.
62	AC_PATH_XTRA
63	if [[ "x$no_x" = "xyes" ]]; then
64	AC_MSG_ERROR([You need X11 to run SheepShaver.])
65	fi
66	CFLAGS="$CFLAGS $X_CFLAGS"
67	CXXFLAGS="$CXXFLAGS $X_CFLAGS"
68	LIBS="$LIBS $X_PRE_LIBS $X_LIBS -lX11 -lXext $X_EXTRA_LIBS"
69
70	dnl We need pthreads on non-PowerPC systems. Try libpthread first, then libc_r (FreeBSD), then PTL.
71	HAVE_PTHREADS=yes
72	if [[ "x$HAVE_PPC" = "xno" ]]; then
73	AC_CHECK_LIB(pthread, pthread_create, , [
74	AC_CHECK_LIB(c_r, pthread_create, , [
75	AC_CHECK_LIB(PTL, pthread_create, , [
76	AC_MSG_ERROR([You need pthreads to run Basilisk II.])
77	])
78	])
79	])
80	AC_CHECK_FUNCS(pthread_cancel)
81	fi
82
83	dnl If POSIX.4 semaphores are not available, we emulate them with pthread mutexes.
84	SEMSRC=
85	AC_CHECK_FUNCS(sem_init, , [
86	if test "x$HAVE_PTHREADS" = "xyes"; then
87	SEMSRC=posix_sem.cpp
88	fi
89	])
90
91	dnl We use XFree86 DGA if possible.
92	if [[ "x$WANT_XF86_DGA" = "xyes" ]]; then
93	AC_CHECK_LIB(Xxf86dga, XF86DGAQueryExtension, [
94	AC_DEFINE(ENABLE_XF86_DGA)
95	LIBS="$LIBS -lXxf86dga"
96	], [
97	AC_MSG_WARN([Could not find XFree86 DGA extension, ignoring --enable-xf86-dga.])
98	WANT_XF86_DGA=no
99	])
100	fi
101
102	dnl We use XFree86 VidMode if possible.
103	if [[ "x$WANT_XF86_VIDMODE" = "xyes" ]]; then
104	AC_CHECK_LIB(Xxf86vm, XF86VidModeQueryExtension, [
105	AC_DEFINE(ENABLE_XF86_VIDMODE)
106	LIBS="$LIBS -lXxf86vm"
107	], [
108	AC_MSG_WARN([Could not find XFree86 VidMode extension, ignoring --enable-xf86-vidmode.])
109	WANT_XF86_VIDMODE=no
110	])
111	fi
112
113	dnl We use GTK+ if possible.
114	UISRCS=
115	if [[ "x$WANT_GTK" = "xyes" ]]; then
116	AM_PATH_GTK(1.2.0, [
117	AC_DEFINE(ENABLE_GTK)
118	CFLAGS="$CFLAGS $GTK_CFLAGS"
119	CXXFLAGS="$CXXFLAGS $GTK_CFLAGS"
120	LIBS="$LIBS $GTK_LIBS"
121	UISRCS=prefs_editor_gtk.cpp
122	], [
123	AC_MSG_WARN([Could not find GTK+, disabling user interface.])
124	WANT_GTK=no
125	])
126	fi
127
128	dnl We use ESD if possible.
129	if [[ "x$WANT_ESD" = "xyes" ]]; then
130	AM_PATH_ESD(0.2.8, [
131	AC_DEFINE(ENABLE_ESD)
132	CFLAGS="$CFLAGS $ESD_CFLAGS"
133	CXXFLAGS="$CXXFLAGS $ESD_CFLAGS"
134	LIBS="$LIBS $ESD_LIBS"
135	], [
136	AC_MSG_WARN([Could not find ESD, disabling ESD support.])
137	WANT_ESD=no
138	])
139	fi
140
141	dnl Checks for header files.
142	AC_HEADER_STDC
143	AC_HEADER_SYS_WAIT
144	AC_CHECK_HEADERS(unistd.h fcntl.h sys/time.h sys/mman.h)
145
146	dnl Checks for typedefs, structures, and compiler characteristics.
147	AC_C_BIGENDIAN
148	AC_C_CONST
149	AC_C_INLINE
150	AC_CHECK_SIZEOF(short, 2)
151	AC_CHECK_SIZEOF(int, 4)
152	AC_CHECK_SIZEOF(long, 4)
153	AC_CHECK_SIZEOF(long long, 8)
154	AC_CHECK_SIZEOF(float, 4)
155	AC_CHECK_SIZEOF(double, 8)
156	AC_CHECK_SIZEOF(void *, 4)
157	AC_TYPE_OFF_T
158	AC_CHECK_TYPE(loff_t, off_t)
159	AC_TYPE_SIZE_T
160	AC_TYPE_SIGNAL
161	AC_HEADER_TIME
162	AC_STRUCT_TM
163
164	dnl Checks for library functions.
165	AC_CHECK_FUNCS(strdup cfmakeraw)
166	AC_CHECK_FUNCS(nanosleep clock_gettime timer_create)
167	AC_CHECK_FUNCS(sigaction signal)
168	AC_CHECK_FUNCS(mmap mprotect munmap)
169	AC_CHECK_FUNCS(vm_allocate vm_deallocate vm_protect)
170
171	dnl Select system-dependant sources.
172	if [[ "x$HAVE_PPC" = "xyes" ]]; then
173	SYSSRCS="Linux/paranoia.cpp Linux/sheepthreads.c Linux/asm_linux.S"
174	else
175	SYSSRCS="../emul_ppc/emul_ppc.cpp"
176	fi
177	SYSSRCS="$SYSSRCS $SEMSRCS $UISRCS $MONSRCS"
178
179	dnl Define a macro that translates a yesno-variable into a C macro definition
180	dnl to be put into the config.h file
181	dnl $1 -- the macro to define
182	dnl $2 -- the value to translate
183	dnl $3 -- template name
184	AC_DEFUN(AC_TRANSLATE_DEFINE, [
185	if [[ "x$2" = "xyes" -o "x$2" = "xguessing yes" ]]; then
186	AC_DEFINE($1, 1, $3)
187	fi
188	])
189
190	dnl Various checks if the system supports vm_allocate() and the like functions.
191	have_mach_vm=no
192	if [[ "x$ac_cv_func_vm_allocate" = "xyes" -a "x$ac_cv_func_vm_deallocate" = "xyes" -a \
193	"x$ac_cv_func_vm_protect" = "xyes" ]]; then
194	have_mach_vm=yes
195	fi
196	AC_TRANSLATE_DEFINE(HAVE_MACH_VM, "$have_mach_vm",
197	[Define if your system has a working vm_allocate()-based memory allocator.])
198
199	dnl Check that vm_allocate(), vm_protect() work
200	if [[ "x$have_mach_vm" = "xyes" ]]; then
201
202	AC_CACHE_CHECK([whether vm_protect works],
203	ac_cv_vm_protect_works, [
204	AC_LANG_SAVE
205	AC_LANG_CPLUSPLUS
206	ac_cv_vm_protect_works=yes
207	dnl First the tests that should segfault
208	for test_def in NONE_READ NONE_WRITE READ_WRITE; do
209	AC_TRY_RUN([
210	#define CONFIGURE_TEST_VM_MAP
211	#define TEST_VM_PROT_$test_def
212	#include "vm_alloc.cpp"
213	], ac_cv_vm_protect_works=no, rm -f core,
214	dnl When cross-compiling, do not assume anything
215	ac_cv_vm_protect_works="guessing no"
216	)
217	done
218	AC_TRY_RUN([
219	#define CONFIGURE_TEST_VM_MAP
220	#define TEST_VM_PROT_RDWR_WRITE
221	#include "vm_alloc.cpp"
222	], , ac_cv_vm_protect_works=no,
223	dnl When cross-compiling, do not assume anything
224	ac_cv_vm_protect_works="guessing no"
225	)
226	AC_LANG_RESTORE
227	]
228	)
229
230	dnl Remove support for vm_allocate() if vm_protect() does not work
231	if [[ "x$have_mach_vm" = "xyes" ]]; then
232	case $ac_cv_vm_protect_works in
233	*yes) have_mach_vm=yes;;
234	*no) have_mach_vm=no;;
235	esac
236	fi
237	AC_TRANSLATE_DEFINE(HAVE_MACH_VM, "$have_mach_vm",
238	[Define if your system has a working vm_allocate()-based memory allocator.])
239
240	fi dnl HAVE_MACH_VM
241
242	dnl Various checks if the system supports mmap() and the like functions.
243	dnl ... and Mach memory allocators are not supported
244	have_mmap_vm=no
245	if [[ "x$ac_cv_func_mmap" = "xyes" -a "x$ac_cv_func_munmap" = "xyes" -a \
246	"x$ac_cv_func_mprotect" = "xyes" ]]; then
247	if [[ "x$have_mach_vm" = "xno" ]]; then
248	have_mmap_vm=yes
249	fi
250	fi
251	AC_TRANSLATE_DEFINE(HAVE_MMAP_VM, "$have_mmap_vm",
252	[Define if your system has a working mmap()-based memory allocator.])
253
254	dnl Check that mmap() and associated functions work.
255	if [[ "x$have_mmap_vm" = "xyes" ]]; then
256
257	dnl Check if we have a working anonymous mmap()
258	AC_CACHE_CHECK([whether mmap supports MAP_ANON],
259	ac_cv_mmap_anon, [
260	AC_LANG_SAVE
261	AC_LANG_CPLUSPLUS
262	AC_TRY_RUN([
263	#define HAVE_MMAP_ANON
264	#define CONFIGURE_TEST_VM_MAP
265	#define TEST_VM_MMAP_ANON
266	#include "vm_alloc.cpp"
267	], ac_cv_mmap_anon=yes, ac_cv_mmap_anon=no,
268	dnl When cross-compiling, do not assume anything.
269	ac_cv_mmap_anon="guessing no"
270	)
271	AC_LANG_RESTORE
272	]
273	)
274	AC_TRANSLATE_DEFINE(HAVE_MMAP_ANON, "$ac_cv_mmap_anon",
275	[Define if <sys/mman.h> defines MAP_ANON and mmap()'ing with MAP_ANON works.])
276
277	AC_CACHE_CHECK([whether mmap supports MAP_ANONYMOUS],
278	ac_cv_mmap_anonymous, [
279	AC_LANG_SAVE
280	AC_LANG_CPLUSPLUS
281	AC_TRY_RUN([
282	#define HAVE_MMAP_ANONYMOUS
283	#define CONFIGURE_TEST_VM_MAP
284	#define TEST_VM_MMAP_ANON
285	#include "vm_alloc.cpp"
286	], ac_cv_mmap_anonymous=yes, ac_cv_mmap_anonymous=no,
287	dnl When cross-compiling, do not assume anything.
288	ac_cv_mmap_anonymous="guessing no"
289	)
290	AC_LANG_RESTORE
291	]
292	)
293	AC_TRANSLATE_DEFINE(HAVE_MMAP_ANONYMOUS, "$ac_cv_mmap_anonymous",
294	[Define if <sys/mman.h> defines MAP_ANONYMOUS and mmap()'ing with MAP_ANONYMOUS works.])
295
296	AC_CACHE_CHECK([whether mprotect works],
297	ac_cv_mprotect_works, [
298	AC_LANG_SAVE
299	AC_LANG_CPLUSPLUS
300	ac_cv_mprotect_works=yes
301	dnl First the tests that should segfault
302	for test_def in NONE_READ NONE_WRITE READ_WRITE; do
303	AC_TRY_RUN([
304	#define CONFIGURE_TEST_VM_MAP
305	#define TEST_VM_PROT_$test_def
306	#include "vm_alloc.cpp"
307	], ac_cv_mprotect_works=no, rm -f core,
308	dnl When cross-compiling, do not assume anything
309	ac_cv_mprotect_works="guessing no"
310	)
311	done
312	AC_TRY_RUN([
313	#define CONFIGURE_TEST_VM_MAP
314	#define TEST_VM_PROT_RDWR_WRITE
315	#include "vm_alloc.cpp"
316	], , ac_cv_mprotect_works=no,
317	dnl When cross-compiling, do not assume anything
318	ac_cv_mprotect_works="guessing no"
319	)
320	AC_LANG_RESTORE
321	]
322	)
323
324	dnl Remove support for mmap() if mprotect() does not work
325	if [[ "x$have_mmap_vm" = "xyes" ]]; then
326	case $ac_cv_mprotect_works in
327	*yes) have_mmap_vm=yes;;
328	*no) have_mmap_vm=no;;
329	esac
330	fi
331	AC_TRANSLATE_DEFINE(HAVE_MMAP_VM, $have_mmap_vm,
332	[Define if your system has a working mmap()-based memory allocator.])
333
334	fi dnl HAVE_MMAP_VM
335
336	dnl Check if we can mmap 0x2000 bytes from 0x0000
337	AC_CACHE_CHECK([whether we can map Low Memory area 0x0000-0x2000],
338	ac_cv_can_map_lm, [
339	AC_LANG_SAVE
340	AC_LANG_CPLUSPLUS
341	AC_TRY_RUN([
342	#include "vm_alloc.cpp"
343	int main(void) { /* returns 0 if we could map the lowmem globals */
344	volatile char * lm = 0;
345	if (vm_init() < 0) exit(1);
346	if (vm_acquire_fixed(0, 0x2000) < 0) exit(1);
347	lm[0] = 'z';
348	if (vm_release((char *)lm, 0x2000) < 0) exit(1);
349	vm_exit(); exit(0);
350	}
351	], ac_cv_can_map_lm=yes, ac_cv_can_map_lm=no,
352	dnl When cross-compiling, do not assume anything.
353	ac_cv_can_map_lm="guessing no"
354	)
355	AC_LANG_RESTORE
356	]
357	)
358
359	dnl Check signal handlers need to be reinstalled
360	AC_CACHE_CHECK([whether signal handlers need to be reinstalled],
361	ac_cv_signal_need_reinstall, [
362	AC_LANG_SAVE
363	AC_LANG_CPLUSPLUS
364	AC_TRY_RUN([
365	#include <stdlib.h>
366	#ifdef HAVE_UNISTD_H
367	#include <unistd.h>
368	#endif
369	#include <signal.h>
370	static int handled_signal = 0;
371	RETSIGTYPE sigusr1_handler(int) { handled_signal++; }
372	int main(void) { /* returns 0 if signals need not to be reinstalled */
373	signal(SIGUSR1, sigusr1_handler); raise(SIGUSR1); raise(SIGUSR1);
374	exit(handled_signal == 2);
375	}
376	], ac_cv_signal_need_reinstall=yes, ac_cv_signal_need_reinstall=no,
377	dnl When cross-compiling, do not assume anything.
378	ac_cv_signal_need_reinstall="guessing yes"
379	)
380	AC_LANG_RESTORE
381	]
382	)
383	AC_TRANSLATE_DEFINE(SIGNAL_NEED_REINSTALL, "$ac_cv_signal_need_reinstall",
384	[Define if your system requires signals to be reinstalled.])
385
386	dnl Check if sigaction handlers need to be reinstalled
387	AC_CACHE_CHECK([whether sigaction handlers need to be reinstalled],
388	ac_cv_sigaction_need_reinstall, [
389	AC_LANG_SAVE
390	AC_LANG_CPLUSPLUS
391	AC_TRY_RUN([
392	#include <stdlib.h>
393	#ifdef HAVE_UNISTD_H
394	#include <unistd.h>
395	#endif
396	#include <signal.h>
397	static int handled_signal = 0;
398	RETSIGTYPE sigusr1_handler(int) { handled_signal++; }
399	typedef RETSIGTYPE (*signal_handler)(int);
400	static signal_handler mysignal(int sig, signal_handler handler) {
401	struct sigaction old_sa;
402	struct sigaction new_sa;
403	new_sa.sa_handler = handler;
404	return ((sigaction(sig,&new_sa,&old_sa) < 0) ? SIG_IGN : old_sa.sa_handler);
405	}
406	int main(void) { /* returns 0 if signals need not to be reinstalled */
407	mysignal(SIGUSR1, sigusr1_handler); raise(SIGUSR1); raise(SIGUSR1);
408	exit(handled_signal == 2);
409	}
410	], ac_cv_sigaction_need_reinstall=yes, ac_cv_sigaction_need_reinstall=no,
411	dnl When cross-compiling, do not assume anything.
412	ac_cv_sigaction_need_reinstall="guessing yes"
413	)
414	AC_LANG_RESTORE
415	]
416	)
417	AC_TRANSLATE_DEFINE(SIGACTION_NEED_REINSTALL, "$ac_cv_sigaction_need_reinstall",
418	[Define if your system requires sigactions to be reinstalled.])
419
420	dnl Check if extended signals are supported.
421	AC_CACHE_CHECK([whether your system supports extended signal handlers],
422	ac_cv_have_extended_signals, [
423	AC_LANG_SAVE
424	AC_LANG_CPLUSPLUS
425	AC_TRY_RUN([
426	#define HAVE_SIGINFO_T 1
427	#define CONFIGURE_TEST_SIGSEGV_RECOVERY
428	#include "vm_alloc.cpp"
429	#include "sigsegv.cpp"
430	], ac_cv_have_extended_signals=yes, ac_cv_have_extended_signals=no,
431	dnl When cross-compiling, do not assume anything.
432	ac_cv_have_extended_signals=no
433	)
434	AC_LANG_RESTORE
435	]
436	)
437	AC_TRANSLATE_DEFINE(HAVE_SIGINFO_T, "$ac_cv_have_extended_signals",
438	[Define if your system support extended signals.])
439
440	dnl Otherwise, check for subterfuges.
441	if [[ "x$ac_cv_have_extended_signals" = "xno" ]]; then
442	AC_CACHE_CHECK([whether we then have a subterfuge for your system],
443	ac_cv_have_sigcontext_hack, [
444	AC_LANG_SAVE
445	AC_LANG_CPLUSPLUS
446	AC_TRY_RUN([
447	#define HAVE_SIGCONTEXT_SUBTERFUGE 1
448	#define CONFIGURE_TEST_SIGSEGV_RECOVERY
449	#include "vm_alloc.cpp"
450	#include "sigsegv.cpp"
451	], ac_cv_have_sigcontext_hack=yes, ac_cv_have_sigcontext_hack=no,
452	dnl When cross-compiling, do not assume anything.
453	ac_cv_have_sigcontext_hack=no
454	)
455	AC_LANG_RESTORE
456	])
457	AC_TRANSLATE_DEFINE(HAVE_SIGCONTEXT_SUBTERFUGE, "$ac_cv_have_sigcontext_hack",
458	[Define if we know a hack to replace siginfo_t->si_addr member.])
459	fi
460
461	dnl Check if we can ignore the fault (instruction skipping in SIGSEGV handler)
462	AC_CACHE_CHECK([whether we can skip instruction in SIGSEGV handler],
463	ac_cv_have_skip_instruction, [
464	AC_LANG_SAVE
465	AC_LANG_CPLUSPLUS
466	AC_TRY_RUN([
467	#define HAVE_SIGSEGV_SKIP_INSTRUCTION 1
468	#define CONFIGURE_TEST_SIGSEGV_RECOVERY
469	#include "vm_alloc.cpp"
470	#include "sigsegv.cpp"
471	], ac_cv_have_skip_instruction=yes, ac_cv_have_skip_instruction=no,
472	dnl When cross-compiling, do not assume anything.
473	ac_cv_have_skip_instruction=no
474	)
475	AC_LANG_RESTORE
476	]
477	)
478	AC_TRANSLATE_DEFINE(HAVE_SIGSEGV_SKIP_INSTRUCTION, "$ac_cv_have_skip_instruction",
479	[Define if we can ignore the fault (instruction skipping in SIGSEGV handler).])
480
481	dnl Can we do Video on SEGV Signals ?
482	CAN_VOSF=no
483	if [[ "$ac_cv_have_extended_signals" = "yes" -o "$ac_cv_have_sigcontext_hack" = "yes" ]]; then
484	CAN_VOSF=yes
485	fi
486
487	dnl Enable VOSF screen updates with this feature is requested and feasible
488	if [[ "x$WANT_VOSF" = "xyes" -a "x$CAN_VOSF" = "xyes" ]]; then
489	AC_DEFINE(ENABLE_VOSF, 1, [Define if using video enabled on SEGV signals.])
490	else
491	WANT_VOSF=no
492	fi
493
494	dnl Generate Makefile.
495	AC_SUBST(SYSSRCS)
496	AC_OUTPUT(Makefile)
497
498	dnl Print summary.
499	echo
500	echo SheepShaver configuration summary:
501	echo
502	echo XFree86 DGA support .............. : $WANT_XF86_DGA
503	echo XFree86 VidMode support .......... : $WANT_XF86_VIDMODE
504	echo Enable video on SEGV signals ..... : $WANT_VOSF
505	echo ESD sound support ................ : $WANT_ESD
506	echo GTK user interface ............... : $WANT_GTK
507	echo mon debugger support ............. : $WANT_MON
508	echo
509	echo "Configuration done. Now type \"make\"."