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_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 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 ESD sound support ................ : $WANT_ESD
echo GTK user interface ............... : $WANT_GTK
echo mon debugger support ............. : $WANT_MON
echo
echo "Configuration done. Now type \"make\"."
Revision:	1.4
Committed:	2003-05-13T16:59:57Z (21 years, 1 month ago) by gbeauche
Branch:	MAIN
Changes since 1.3:	+310 -2 lines
Log Message:	Use vm_acquire/vm_acquire_fixed/vm_release API. Prepare use of SIGSEGV handlers and instruction skippers. Fix test prior to including posix_sem.cpp.
#	Content
1	dnl Process this file with autoconf to produce a configure script.
2	dnl Written in 2002 by Christian Bauer
3
4	AC_INIT(main_unix.cpp)
5	AC_PREREQ(2.12)
6	AC_CONFIG_HEADER(config.h)
7
8	dnl Options.
9	AC_ARG_ENABLE(xf86-dga, [ --enable-xf86-dga use the XFree86 DGA extension [default=yes]], [WANT_XF86_DGA=$enableval], [WANT_XF86_DGA=yes])
10	AC_ARG_ENABLE(xf86-vidmode, [ --enable-xf86-vidmode use the XFree86 VidMode extension [default=yes]], [WANT_XF86_VIDMODE=$enableval], [WANT_XF86_VIDMODE=yes])
11	AC_ARG_WITH(esd, [ --with-esd support ESD for sound under Linux/FreeBSD [default=yes]], [WANT_ESD=$withval], [WANT_ESD=yes])
12	AC_ARG_WITH(gtk, [ --with-gtk use GTK user interface [default=yes]], [WANT_GTK=$withval], [WANT_GTK=yes])
13	AC_ARG_WITH(mon, [ --with-mon use mon as debugger [default=yes]], [WANT_MON=$withval], [WANT_MON=yes])
14
15	dnl Checks for programs.
16	AC_PROG_CC
17	AC_PROG_CPP
18	AC_PROG_CXX
19	AC_PROG_MAKE_SET
20	AC_PROG_INSTALL
21
22	dnl Check for PowerPC target CPU.
23	HAVE_PPC=no
24	AC_MSG_CHECKING(for PowerPC target CPU)
25	AC_EGREP_CPP(yes,
26	[
27	#ifdef __powerpc__
28	yes
29	#endif
30	], [AC_MSG_RESULT(yes); HAVE_PPC=yes], AC_MSG_RESULT(no))
31
32	dnl We use mon if possible.
33	MONSRCS=
34	if [[ "x$WANT_MON" = "xyes" ]]; then
35	AC_MSG_CHECKING(for mon)
36	mon_srcdir=../../../mon/src
37	if grep mon_init $mon_srcdir/mon.h >/dev/null 2>/dev/null; then
38	AC_MSG_RESULT(yes)
39	AC_DEFINE(ENABLE_MON)
40	MONSRCS="$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 $mon_srcdir/disass/m68k-opc.c"
41	CXXFLAGS="$CXXFLAGS -I$mon_srcdir -I$mon_srcdir/disass"
42	AC_CHECK_LIB(ncurses, tgetent, ,
43	AC_CHECK_LIB(termcap, tgetent, ,
44	AC_CHECK_LIB(termlib, tgetent, ,
45	AC_CHECK_LIB(terminfo, tgetent, ,
46	AC_CHECK_LIB(Hcurses, tgetent, ,
47	AC_CHECK_LIB(curses, tgetent))))))
48	AC_CHECK_LIB(readline, readline)
49	AC_CHECK_HEADERS(readline.h history.h readline/readline.h readline/history.h)
50	else
51	AC_MSG_RESULT(no)
52	AC_MSG_WARN([Could not find mon, ignoring --with-mon.])
53	WANT_MON=no
54	fi
55	fi
56
57	dnl Checks for libraries.
58	AC_CHECK_LIB(posix4, sem_init)
59
60	dnl We need X11.
61	AC_PATH_XTRA
62	if [[ "x$no_x" = "xyes" ]]; then
63	AC_MSG_ERROR([You need X11 to run SheepShaver.])
64	fi
65	CFLAGS="$CFLAGS $X_CFLAGS"
66	CXXFLAGS="$CXXFLAGS $X_CFLAGS"
67	LIBS="$LIBS $X_PRE_LIBS $X_LIBS -lX11 -lXext $X_EXTRA_LIBS"
68
69	dnl We need pthreads on non-PowerPC systems. Try libpthread first, then libc_r (FreeBSD), then PTL.
70	HAVE_PTHREADS=yes
71	if [[ "x$HAVE_PPC" = "xno" ]]; then
72	AC_CHECK_LIB(pthread, pthread_create, , [
73	AC_CHECK_LIB(c_r, pthread_create, , [
74	AC_CHECK_LIB(PTL, pthread_create, , [
75	AC_MSG_ERROR([You need pthreads to run Basilisk II.])
76	])
77	])
78	])
79	AC_CHECK_FUNCS(pthread_cancel)
80	fi
81
82	dnl If POSIX.4 semaphores are not available, we emulate them with pthread mutexes.
83	SEMSRC=
84	AC_CHECK_FUNCS(sem_init, , [
85	if test "x$HAVE_PTHREADS" = "xyes"; then
86	SEMSRC=posix_sem.cpp
87	fi
88	])
89
90	dnl We use XFree86 DGA if possible.
91	if [[ "x$WANT_XF86_DGA" = "xyes" ]]; then
92	AC_CHECK_LIB(Xxf86dga, XF86DGAQueryExtension, [
93	AC_DEFINE(ENABLE_XF86_DGA)
94	LIBS="$LIBS -lXxf86dga"
95	], [
96	AC_MSG_WARN([Could not find XFree86 DGA extension, ignoring --enable-xf86-dga.])
97	WANT_XF86_DGA=no
98	])
99	fi
100
101	dnl We use XFree86 VidMode if possible.
102	if [[ "x$WANT_XF86_VIDMODE" = "xyes" ]]; then
103	AC_CHECK_LIB(Xxf86vm, XF86VidModeQueryExtension, [
104	AC_DEFINE(ENABLE_XF86_VIDMODE)
105	LIBS="$LIBS -lXxf86vm"
106	], [
107	AC_MSG_WARN([Could not find XFree86 VidMode extension, ignoring --enable-xf86-vidmode.])
108	WANT_XF86_VIDMODE=no
109	])
110	fi
111
112	dnl We use GTK+ if possible.
113	UISRCS=
114	if [[ "x$WANT_GTK" = "xyes" ]]; then
115	AM_PATH_GTK(1.2.0, [
116	AC_DEFINE(ENABLE_GTK)
117	CFLAGS="$CFLAGS $GTK_CFLAGS"
118	CXXFLAGS="$CXXFLAGS $GTK_CFLAGS"
119	LIBS="$LIBS $GTK_LIBS"
120	UISRCS=prefs_editor_gtk.cpp
121	], [
122	AC_MSG_WARN([Could not find GTK+, disabling user interface.])
123	WANT_GTK=no
124	])
125	fi
126
127	dnl We use ESD if possible.
128	if [[ "x$WANT_ESD" = "xyes" ]]; then
129	AM_PATH_ESD(0.2.8, [
130	AC_DEFINE(ENABLE_ESD)
131	CFLAGS="$CFLAGS $ESD_CFLAGS"
132	CXXFLAGS="$CXXFLAGS $ESD_CFLAGS"
133	LIBS="$LIBS $ESD_LIBS"
134	], [
135	AC_MSG_WARN([Could not find ESD, disabling ESD support.])
136	WANT_ESD=no
137	])
138	fi
139
140	dnl Checks for header files.
141	AC_HEADER_STDC
142	AC_HEADER_SYS_WAIT
143	AC_CHECK_HEADERS(unistd.h fcntl.h sys/time.h sys/mman.h)
144
145	dnl Checks for typedefs, structures, and compiler characteristics.
146	AC_C_BIGENDIAN
147	AC_C_CONST
148	AC_C_INLINE
149	AC_CHECK_SIZEOF(short, 2)
150	AC_CHECK_SIZEOF(int, 4)
151	AC_CHECK_SIZEOF(long, 4)
152	AC_CHECK_SIZEOF(long long, 8)
153	AC_CHECK_SIZEOF(float, 4)
154	AC_CHECK_SIZEOF(double, 8)
155	AC_CHECK_SIZEOF(void *, 4)
156	AC_TYPE_OFF_T
157	AC_CHECK_TYPE(loff_t, off_t)
158	AC_TYPE_SIZE_T
159	AC_TYPE_SIGNAL
160	AC_HEADER_TIME
161	AC_STRUCT_TM
162
163	dnl Checks for library functions.
164	AC_CHECK_FUNCS(strdup cfmakeraw)
165	AC_CHECK_FUNCS(nanosleep clock_gettime timer_create)
166	AC_CHECK_FUNCS(sigaction signal)
167	AC_CHECK_FUNCS(mmap mprotect munmap)
168	AC_CHECK_FUNCS(vm_allocate vm_deallocate vm_protect)
169
170	dnl Select system-dependant sources.
171	if [[ "x$HAVE_PPC" = "xyes" ]]; then
172	SYSSRCS="Linux/paranoia.cpp Linux/sheepthreads.c Linux/asm_linux.S"
173	else
174	SYSSRCS="../emul_ppc/emul_ppc.cpp"
175	fi
176	SYSSRCS="$SYSSRCS $SEMSRCS $UISRCS $MONSRCS"
177
178	dnl Define a macro that translates a yesno-variable into a C macro definition
179	dnl to be put into the config.h file
180	dnl $1 -- the macro to define
181	dnl $2 -- the value to translate
182	dnl $3 -- template name
183	AC_DEFUN(AC_TRANSLATE_DEFINE, [
184	if [[ "x$2" = "xyes" -o "x$2" = "xguessing yes" ]]; then
185	AC_DEFINE($1, 1, $3)
186	fi
187	])
188
189	dnl Various checks if the system supports vm_allocate() and the like functions.
190	have_mach_vm=no
191	if [[ "x$ac_cv_func_vm_allocate" = "xyes" -a "x$ac_cv_func_vm_deallocate" = "xyes" -a \
192	"x$ac_cv_func_vm_protect" = "xyes" ]]; then
193	have_mach_vm=yes
194	fi
195	AC_TRANSLATE_DEFINE(HAVE_MACH_VM, "$have_mach_vm",
196	[Define if your system has a working vm_allocate()-based memory allocator.])
197
198	dnl Check that vm_allocate(), vm_protect() work
199	if [[ "x$have_mach_vm" = "xyes" ]]; then
200
201	AC_CACHE_CHECK([whether vm_protect works],
202	ac_cv_vm_protect_works, [
203	AC_LANG_SAVE
204	AC_LANG_CPLUSPLUS
205	ac_cv_vm_protect_works=yes
206	dnl First the tests that should segfault
207	for test_def in NONE_READ NONE_WRITE READ_WRITE; do
208	AC_TRY_RUN([
209	#define CONFIGURE_TEST_VM_MAP
210	#define TEST_VM_PROT_$test_def
211	#include "vm_alloc.cpp"
212	], ac_cv_vm_protect_works=no, rm -f core,
213	dnl When cross-compiling, do not assume anything
214	ac_cv_vm_protect_works="guessing no"
215	)
216	done
217	AC_TRY_RUN([
218	#define CONFIGURE_TEST_VM_MAP
219	#define TEST_VM_PROT_RDWR_WRITE
220	#include "vm_alloc.cpp"
221	], , ac_cv_vm_protect_works=no,
222	dnl When cross-compiling, do not assume anything
223	ac_cv_vm_protect_works="guessing no"
224	)
225	AC_LANG_RESTORE
226	]
227	)
228
229	dnl Remove support for vm_allocate() if vm_protect() does not work
230	if [[ "x$have_mach_vm" = "xyes" ]]; then
231	case $ac_cv_vm_protect_works in
232	*yes) have_mach_vm=yes;;
233	*no) have_mach_vm=no;;
234	esac
235	fi
236	AC_TRANSLATE_DEFINE(HAVE_MACH_VM, "$have_mach_vm",
237	[Define if your system has a working vm_allocate()-based memory allocator.])
238
239	fi dnl HAVE_MACH_VM
240
241	dnl Various checks if the system supports mmap() and the like functions.
242	dnl ... and Mach memory allocators are not supported
243	have_mmap_vm=no
244	if [[ "x$ac_cv_func_mmap" = "xyes" -a "x$ac_cv_func_munmap" = "xyes" -a \
245	"x$ac_cv_func_mprotect" = "xyes" ]]; then
246	if [[ "x$have_mach_vm" = "xno" ]]; then
247	have_mmap_vm=yes
248	fi
249	fi
250	AC_TRANSLATE_DEFINE(HAVE_MMAP_VM, "$have_mmap_vm",
251	[Define if your system has a working mmap()-based memory allocator.])
252
253	dnl Check that mmap() and associated functions work.
254	if [[ "x$have_mmap_vm" = "xyes" ]]; then
255
256	dnl Check if we have a working anonymous mmap()
257	AC_CACHE_CHECK([whether mmap supports MAP_ANON],
258	ac_cv_mmap_anon, [
259	AC_LANG_SAVE
260	AC_LANG_CPLUSPLUS
261	AC_TRY_RUN([
262	#define HAVE_MMAP_ANON
263	#define CONFIGURE_TEST_VM_MAP
264	#define TEST_VM_MMAP_ANON
265	#include "vm_alloc.cpp"
266	], ac_cv_mmap_anon=yes, ac_cv_mmap_anon=no,
267	dnl When cross-compiling, do not assume anything.
268	ac_cv_mmap_anon="guessing no"
269	)
270	AC_LANG_RESTORE
271	]
272	)
273	AC_TRANSLATE_DEFINE(HAVE_MMAP_ANON, "$ac_cv_mmap_anon",
274	[Define if <sys/mman.h> defines MAP_ANON and mmap()'ing with MAP_ANON works.])
275
276	AC_CACHE_CHECK([whether mmap supports MAP_ANONYMOUS],
277	ac_cv_mmap_anonymous, [
278	AC_LANG_SAVE
279	AC_LANG_CPLUSPLUS
280	AC_TRY_RUN([
281	#define HAVE_MMAP_ANONYMOUS
282	#define CONFIGURE_TEST_VM_MAP
283	#define TEST_VM_MMAP_ANON
284	#include "vm_alloc.cpp"
285	], ac_cv_mmap_anonymous=yes, ac_cv_mmap_anonymous=no,
286	dnl When cross-compiling, do not assume anything.
287	ac_cv_mmap_anonymous="guessing no"
288	)
289	AC_LANG_RESTORE
290	]
291	)
292	AC_TRANSLATE_DEFINE(HAVE_MMAP_ANONYMOUS, "$ac_cv_mmap_anonymous",
293	[Define if <sys/mman.h> defines MAP_ANONYMOUS and mmap()'ing with MAP_ANONYMOUS works.])
294
295	AC_CACHE_CHECK([whether mprotect works],
296	ac_cv_mprotect_works, [
297	AC_LANG_SAVE
298	AC_LANG_CPLUSPLUS
299	ac_cv_mprotect_works=yes
300	dnl First the tests that should segfault
301	for test_def in NONE_READ NONE_WRITE READ_WRITE; do
302	AC_TRY_RUN([
303	#define CONFIGURE_TEST_VM_MAP
304	#define TEST_VM_PROT_$test_def
305	#include "vm_alloc.cpp"
306	], ac_cv_mprotect_works=no, rm -f core,
307	dnl When cross-compiling, do not assume anything
308	ac_cv_mprotect_works="guessing no"
309	)
310	done
311	AC_TRY_RUN([
312	#define CONFIGURE_TEST_VM_MAP
313	#define TEST_VM_PROT_RDWR_WRITE
314	#include "vm_alloc.cpp"
315	], , ac_cv_mprotect_works=no,
316	dnl When cross-compiling, do not assume anything
317	ac_cv_mprotect_works="guessing no"
318	)
319	AC_LANG_RESTORE
320	]
321	)
322
323	dnl Remove support for mmap() if mprotect() does not work
324	if [[ "x$have_mmap_vm" = "xyes" ]]; then
325	case $ac_cv_mprotect_works in
326	*yes) have_mmap_vm=yes;;
327	*no) have_mmap_vm=no;;
328	esac
329	fi
330	AC_TRANSLATE_DEFINE(HAVE_MMAP_VM, $have_mmap_vm,
331	[Define if your system has a working mmap()-based memory allocator.])
332
333	fi dnl HAVE_MMAP_VM
334
335	dnl Check if we can mmap 0x2000 bytes from 0x0000
336	AC_CACHE_CHECK([whether we can map Low Memory area 0x0000-0x2000],
337	ac_cv_can_map_lm, [
338	AC_LANG_SAVE
339	AC_LANG_CPLUSPLUS
340	AC_TRY_RUN([
341	#include "vm_alloc.cpp"
342	int main(void) { /* returns 0 if we could map the lowmem globals */
343	volatile char * lm = 0;
344	if (vm_init() < 0) exit(1);
345	if (vm_acquire_fixed(0, 0x2000) < 0) exit(1);
346	lm[0] = 'z';
347	if (vm_release((char *)lm, 0x2000) < 0) exit(1);
348	vm_exit(); exit(0);
349	}
350	], ac_cv_can_map_lm=yes, ac_cv_can_map_lm=no,
351	dnl When cross-compiling, do not assume anything.
352	ac_cv_can_map_lm="guessing no"
353	)
354	AC_LANG_RESTORE
355	]
356	)
357
358	dnl Check signal handlers need to be reinstalled
359	AC_CACHE_CHECK([whether signal handlers need to be reinstalled],
360	ac_cv_signal_need_reinstall, [
361	AC_LANG_SAVE
362	AC_LANG_CPLUSPLUS
363	AC_TRY_RUN([
364	#include <stdlib.h>
365	#ifdef HAVE_UNISTD_H
366	#include <unistd.h>
367	#endif
368	#include <signal.h>
369	static int handled_signal = 0;
370	RETSIGTYPE sigusr1_handler(int) { handled_signal++; }
371	int main(void) { /* returns 0 if signals need not to be reinstalled */
372	signal(SIGUSR1, sigusr1_handler); raise(SIGUSR1); raise(SIGUSR1);
373	exit(handled_signal == 2);
374	}
375	], ac_cv_signal_need_reinstall=yes, ac_cv_signal_need_reinstall=no,
376	dnl When cross-compiling, do not assume anything.
377	ac_cv_signal_need_reinstall="guessing yes"
378	)
379	AC_LANG_RESTORE
380	]
381	)
382	AC_TRANSLATE_DEFINE(SIGNAL_NEED_REINSTALL, "$ac_cv_signal_need_reinstall",
383	[Define if your system requires signals to be reinstalled.])
384
385	dnl Check if sigaction handlers need to be reinstalled
386	AC_CACHE_CHECK([whether sigaction handlers need to be reinstalled],
387	ac_cv_sigaction_need_reinstall, [
388	AC_LANG_SAVE
389	AC_LANG_CPLUSPLUS
390	AC_TRY_RUN([
391	#include <stdlib.h>
392	#ifdef HAVE_UNISTD_H
393	#include <unistd.h>
394	#endif
395	#include <signal.h>
396	static int handled_signal = 0;
397	RETSIGTYPE sigusr1_handler(int) { handled_signal++; }
398	typedef RETSIGTYPE (*signal_handler)(int);
399	static signal_handler mysignal(int sig, signal_handler handler) {
400	struct sigaction old_sa;
401	struct sigaction new_sa;
402	new_sa.sa_handler = handler;
403	return ((sigaction(sig,&new_sa,&old_sa) < 0) ? SIG_IGN : old_sa.sa_handler);
404	}
405	int main(void) { /* returns 0 if signals need not to be reinstalled */
406	mysignal(SIGUSR1, sigusr1_handler); raise(SIGUSR1); raise(SIGUSR1);
407	exit(handled_signal == 2);
408	}
409	], ac_cv_sigaction_need_reinstall=yes, ac_cv_sigaction_need_reinstall=no,
410	dnl When cross-compiling, do not assume anything.
411	ac_cv_sigaction_need_reinstall="guessing yes"
412	)
413	AC_LANG_RESTORE
414	]
415	)
416	AC_TRANSLATE_DEFINE(SIGACTION_NEED_REINSTALL, "$ac_cv_sigaction_need_reinstall",
417	[Define if your system requires sigactions to be reinstalled.])
418
419	dnl Check if extended signals are supported.
420	AC_CACHE_CHECK([whether your system supports extended signal handlers],
421	ac_cv_have_extended_signals, [
422	AC_LANG_SAVE
423	AC_LANG_CPLUSPLUS
424	AC_TRY_RUN([
425	#define HAVE_SIGINFO_T 1
426	#define CONFIGURE_TEST_SIGSEGV_RECOVERY
427	#include "vm_alloc.cpp"
428	#include "sigsegv.cpp"
429	], ac_cv_have_extended_signals=yes, ac_cv_have_extended_signals=no,
430	dnl When cross-compiling, do not assume anything.
431	ac_cv_have_extended_signals=no
432	)
433	AC_LANG_RESTORE
434	]
435	)
436	AC_TRANSLATE_DEFINE(HAVE_SIGINFO_T, "$ac_cv_have_extended_signals",
437	[Define if your system support extended signals.])
438
439	dnl Otherwise, check for subterfuges.
440	if [[ "x$ac_cv_have_extended_signals" = "xno" ]]; then
441	AC_CACHE_CHECK([whether we then have a subterfuge for your system],
442	ac_cv_have_sigcontext_hack, [
443	AC_LANG_SAVE
444	AC_LANG_CPLUSPLUS
445	AC_TRY_RUN([
446	#define HAVE_SIGCONTEXT_SUBTERFUGE 1
447	#define CONFIGURE_TEST_SIGSEGV_RECOVERY
448	#include "vm_alloc.cpp"
449	#include "sigsegv.cpp"
450	], ac_cv_have_sigcontext_hack=yes, ac_cv_have_sigcontext_hack=no,
451	dnl When cross-compiling, do not assume anything.
452	ac_cv_have_sigcontext_hack=no
453	)
454	AC_LANG_RESTORE
455	])
456	AC_TRANSLATE_DEFINE(HAVE_SIGCONTEXT_SUBTERFUGE, "$ac_cv_have_sigcontext_hack",
457	[Define if we know a hack to replace siginfo_t->si_addr member.])
458	fi
459
460	dnl Check if we can ignore the fault (instruction skipping in SIGSEGV handler)
461	AC_CACHE_CHECK([whether we can skip instruction in SIGSEGV handler],
462	ac_cv_have_skip_instruction, [
463	AC_LANG_SAVE
464	AC_LANG_CPLUSPLUS
465	AC_TRY_RUN([
466	#define HAVE_SIGSEGV_SKIP_INSTRUCTION 1
467	#define CONFIGURE_TEST_SIGSEGV_RECOVERY
468	#include "vm_alloc.cpp"
469	#include "sigsegv.cpp"
470	], ac_cv_have_skip_instruction=yes, ac_cv_have_skip_instruction=no,
471	dnl When cross-compiling, do not assume anything.
472	ac_cv_have_skip_instruction=no
473	)
474	AC_LANG_RESTORE
475	]
476	)
477	AC_TRANSLATE_DEFINE(HAVE_SIGSEGV_SKIP_INSTRUCTION, "$ac_cv_have_skip_instruction",
478	[Define if we can ignore the fault (instruction skipping in SIGSEGV handler).])
479
480	dnl Generate Makefile.
481	AC_SUBST(SYSSRCS)
482	AC_OUTPUT(Makefile)
483
484	dnl Print summary.
485	echo
486	echo SheepShaver configuration summary:
487	echo
488	echo XFree86 DGA support .............. : $WANT_XF86_DGA
489	echo XFree86 VidMode support .......... : $WANT_XF86_VIDMODE
490	echo ESD sound support ................ : $WANT_ESD
491	echo GTK user interface ............... : $WANT_GTK
492	echo mon debugger support ............. : $WANT_MON
493	echo
494	echo "Configuration done. Now type \"make\"."