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

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

dnl Options.
WANT_DGA=yes
WANT_UI=yes
AC_ARG_ENABLE(dga, [  --enable-dga            use the DGA extension (default)], [WANT_DGA=$enableval], [])
AC_ARG_ENABLE(ui,  [  --enable-ui             use GTK user interface (default)], [WANT_UI=$enableval], [])

dnl Checks for programs.
AC_PROG_CC
AC_PROG_CPP
AC_PROG_CXX
AC_PROG_MAKE_SET
AC_PROG_INSTALL

dnl Checks for libraries.
AC_PATH_XTRA
if [[ "x$no_x" = "xyes" ]]; then
  AC_MSG_ERROR([You need X11 to run Basilisk II.])
fi

CFLAGS="$CFLAGS $X_CFLAGS"
CXXFLAGS="$CXXFLAGS $X_CFLAGS"
LIBS="$LIBS $X_PRE_LIBS $X_LIBS -lX11 -lXext $X_EXTRA_LIBS"
STATICLIBS=

dnl We need pthreads.
AC_CHECK_LIB(pthread, pthread_create, HAVE_PTHREADS=yes, HAVE_PTHREADS=no)
if [[ "x$HAVE_PTHREADS" = "xno" ]]; then
  dnl Check even the libc_r (FreeBSD)
  AC_CHECK_LIB(c_r, pthread_create, HAVE_PTHREADS=yes, HAVE_PTHREADS=no)
  if [[ "x$HAVE_PTHREADS" = "xno" ]]; then
    dnl Or maybe the user has PTL (NetBSD)
    AC_CHECK_LIB(PTL, pthread_create, HAVE_PTHREADS=yes, HAVE_PTHREADS=no)
    if [[ "x$HAVE_PTHREADS" = "xno" ]]; then
      AC_MSG_ERROR([You need pthreads to run Basilisk II.])
    else
      LIBS="$LIBS -lPTL"
    fi
  else
     LIBS="$LIBS -lc_r"
  fi
else
  LIBS="$LIBS -lpthread"
fi
AC_CHECK_FUNCS(pthread_cancel)

dnl We use DGA if possible.
if [[ "x$WANT_DGA" = "xyes" ]]; then
  AC_CHECK_LIB(Xxf86dga, XF86DGAQueryExtension, HAVE_DGA=yes, HAVE_DGA=no)
  if [[ "x$HAVE_DGA" = "xno" ]]; then
    AC_MSG_WARN([Could not find DGA extension, ignoring --enable-dga.])
  else
    DEFINES="$DEFINES -DENABLE_DGA=1"
    LIBS="$LIBS -lXxf86dga"
  fi
fi

dnl We use GTK+ if possible.
if [[ "x$WANT_UI" = "xyes" ]]; then
  AM_PATH_GTK(1.2.0)
  if [[ "x$no_gtk" = "xyes" ]]; then
    echo "Did not find gtk+, disabling user interface."
    WANT_UI=no
    GTK_CFLAGS=
    GTK_LIBS=
  else
    DEFINES="$DEFINES -DENABLE_GTK=1"
  fi
  CFLAGS="$CFLAGS $GTK_CFLAGS"
  CXXFLAGS="$CXXFLAGS $GTK_CFLAGS"
  LIBS="$LIBS $GTK_LIBS"
fi

dnl We need POSIX.4 semaphores (and other POSIX.4 blessings).
SEMSRCS=
AC_CHECK_FUNCS(sem_init)
if [[ "x$ac_cv_func_sem_init" = "xno" ]]; then
  AC_CHECK_LIB(posix4, sem_init, HAVE_LIBPOSIX4=yes, HAVE_LIBPOSIX4=no)
  if [[ "x$HAVE_LIBPOSIX4" = "xno" ]]; then
    dnl Emulate semaphores with pthread mutexes
    SEMSRCS="posix_sem.cpp"
  else
    LIBS="$LIBS -lposix4"
  fi
fi

dnl Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS(unistd.h fcntl.h sys/time.h)

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_BIGENDIAN
AC_C_CONST
AC_C_INLINE
AC_CHECK_SIZEOF(short, 2)
AC_CHECK_SIZEOF(int, 4)
AC_CHECK_SIZEOF(long, 4)
AC_CHECK_SIZEOF(long long, 8)
AC_TYPE_OFF_T
AC_CHECK_TYPE(loff_t, off_t)
AC_TYPE_SIZE_T
AC_HEADER_TIME
AC_STRUCT_TM

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

dnl Select system-dependant source files.
SYSSRCS="../dummy/ether_dummy.cpp ../dummy/scsi_dummy.cpp ../dummy/audio_dummy.cpp"
if MACHINE=`uname -a 2>/dev/null`; then
  case "$MACHINE" in
  Linux*)
    SYSSRCS="Linux/ether_linux.cpp Linux/scsi_linux.cpp Linux/audio_linux.cpp"
    ;;
  FreeBSD*3.*)
    dnl Check for the CAM library
    AC_CHECK_LIB(cam, cam_open_btl, HAVE_LIBCAM=yes, HAVE_LIBCAM=no) 
    if [[ "x$HAVE_LIBCAM" = "xno" ]]; then
      AC_MSG_ERROR([Cannot find libcam for SCSI management.])
    else
      dnl Check for the sys kernel includes
      AC_CHECK_HEADER(/sys/cam/cam.h)
      if [[ "x$ac_cv_header__sys_cam_cam_h" = "xno" ]]; then
        dnl In this case I should fix this thing including a "patch"
        dnl to access directly to the functions in the kernel :) --Orlando
        AC_MSG_ERROR([Cannot find kernel includes for CAM library.])
      fi
      SYSSRCS="../dummy/ether_dummy.cpp FreeBSD/scsi_freebsd.cpp ../dummy/audio_dummy.cpp"
      CXXFLAGS="$CXXFLAGS -I/sys"
      CFLAGS="$CFLAGS -I/sys"
      LIBS="$LIBS -lcam"
      DEFINES="$DEFINES -DBSD_COMP -DCAM"
    fi
    ;;
  FreeBSD*)
    dnl Check for the SCSI library
    AC_CHECK_LIB(scsi, scsi_open, HAVE_LIBSCSI=yes, HAVE_LIBSCSI=no)
    if [[ "x$HAVE_LIBSCSI" = "xno" ]]; then
      AC_MSG_ERROR([Cannot find libscsi for SCSI management.])
    else
      dnl Check for the sys kernel includes
      AC_CHECK_HEADER(scsi.h sys/scsiio.h)
      if [[ "x$ac_cv_header_scsi_h" = "xno" ]]; then
        AC_MSG_ERROR([Cannot find includes for the SCSI library.])
      fi
      SYSSRCS="../dummy/ether_dummy.cpp FreeBSD/scsi_freebsd.cpp ../dummy/audio_dummy.cpp"
      LIBS="$LIBS -lscsi"
      DEFINES="$DEFINES -DBSD_COMP"
    fi
    ;;
  SunOS*)
    SYSSRCS="../dummy/ether_dummy.cpp ../dummy/scsi_dummy.cpp Solaris/audio_solaris.cpp"
    DEFINES="$DEFINES -DBSD_COMP -D_POSIX_PTHREAD_SEMANTICS"
    ;;
  IRIX*)
    SYSSRCS="../dummy/ether_dummy.cpp ../dummy/scsi_dummy.cpp ../dummy/audio_dummy.cpp Irix/unaligned.c"
    DEFINES="$DEFINES -DCRTSCTS=CNEW_RTSCTS -DB230400=B115200"
    LIBS="$LIBS -lm"
    ;;
  esac
  if [[ "x$WANT_UI" = "xyes" ]]; then
    SYSSRCS="$SYSSRCS prefs_editor_gtk.cpp"
  else
    SYSSRCS="$SYSSRCS ../dummy/prefs_editor_dummy.cpp"
  fi
fi
if [[ "x$SEMSRCS" != "x" ]]; then
  SYSSRCS="$SYSSRCS $SEMSRCS"
fi

dnl Defaults for UAE CPU.
CPUINCLUDES="-I../uae_cpu"
CPUSRCS="../uae_cpu/basilisk_glue.cpp ../uae_cpu/memory.cpp ../uae_cpu/newcpu.cpp ../uae_cpu/readcpu.cpp ../uae_cpu/fpp.cpp cpustbl.cpp cpudefs.cpp"

dnl Check for i386.
HAVE_I386=no
AC_MSG_CHECKING(for x86 target CPU)
AC_EGREP_CPP(yes,
[
#ifdef __i386__
  yes
#endif
], [AC_MSG_RESULT(yes); HAVE_I386=yes], AC_MSG_RESULT(no))

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

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

dnl Set "-fomit-frame-pointer" on GCC.
if [[ "x$HAVE_GCC27" = "xyes" ]]; then
  CFLAGS="$CFLAGS -fomit-frame-pointer"
  CXXFLAGS="$CXXFLAGS -fomit-frame-pointer"
fi

dnl Select appropriate CPU source and REGPARAM define.
if [[ "x$HAVE_GCC27" = "xyes" -a "x$HAVE_I386" = "xyes" ]]; then
  DEFINES="$DEFINES -DREGPARAM=\"__attribute__((regparm(3)))\""
  if [[ "x$HAVE_GAS" = "xyes" ]]; then
    DEFINES="$DEFINES -DX86_ASSEMBLY"
    CPUSRCS="$CPUSRCS cpufast1.s cpufast2.s cpufast3.s cpufast4.s cpufast5.s cpufast6.s cpufast7.s cpufast8.s"
  else
    CPUSRCS="$CPUSRCS cpuemu1.cpp cpuemu2.cpp cpuemu3.cpp cpuemu4.cpp cpuemu5.cpp cpuemu6.cpp cpuemu7.cpp cpuemu8.cpp"
  fi
else
  CPUSRCS="$CPUSRCS cpuemu1.cpp cpuemu2.cpp cpuemu3.cpp cpuemu4.cpp cpuemu5.cpp cpuemu6.cpp cpuemu7.cpp cpuemu8.cpp"
fi

dnl Generate Makefile.
AC_SUBST(DEFINES)
AC_SUBST(STATICLIBS)
AC_SUBST(SYSSRCS)
AC_SUBST(CPUINCLUDES)
AC_SUBST(CPUSRCS)
AC_OUTPUT(Makefile)
echo "Configuration done. Now type \"make\"."