dnl Process this file with autoconf to produce a configure script.
AC_INIT(aclocal.m4)
AC_PROG_CC

LT_AC_PROG_SED

AC_LIBTOOL_DLOPEN
AC_PROG_LIBTOOL
AM_PROG_LIBTOOL

AM_INIT_AUTOMAKE(rioutil,1.4.6)
AM_CONFIG_HEADER(include/config.h)

AH_TOP(
#undef WITH_LIBUSB
#undef WITH_USBDEVFS
#undef __MacOSX__
)

dnl Checks for programs.
AC_PROG_INSTALL
AC_PROG_LN_S

dnl Checks for libraries.
dnl Replace `main' with a function in -lz:
AC_CHECK_LIB(z, main)

dnl Check if C compiler understands -c and -o at the same time
AC_PROG_CC_C_O
if eval "test \"`echo '$ac_cv_prog_cc_'${ac_cc}_c_o`\" = no"; then
      BROKEN_CC=
else
      BROKEN_CC=#
fi
AC_SUBST(BROKEN_CC)

AC_PROG_MAKE_SET

dnl Checks for libraries.
AC_CHECK_LIB(z, compress)

dnl Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS(fcntl.h limits.h strings.h sys/ioctl.h unistd.h getopt.h libgen.h linux/usbdevice_fs.h bswap.h sys/byteswap.h)

AC_CHECK_LIB(gnugetopt, getopt_long)

dnl Checks for typedefs, structures, and compiler characteristics.
AC_TYPE_OFF_T

dnl Checks for library functions.
AC_PROG_GCC_TRADITIONAL
AC_FUNC_MEMCMP
AC_CHECK_FUNCS(memmem basename)

dnl AC_ARG_PROGRAM

dnl libusb is now the default method
libusb=yes

AC_MSG_CHECKING(whether to use USBDEVFS)
AC_ARG_WITH(usbdevfs,
[  --with-usbdevfs     Include USBDEVFS support
  --without-usbdevfs  Don't include USBDEVFS support (default)],
[ case "$withval" in
  yes)
    usbdevfs=yes
    libusb=no
    AC_MSG_RESULT(yes)
    AC_DEFINE_UNQUOTED(WITH_USBDEVFS)
    AC_SUBST(WITH_USBDEVS)
    ;;
  *)
    usbdevfs=no
    AC_MSG_RESULT(no)
    ;;
  esac],
[
  usbdevfs=no
  AC_MSG_RESULT(no)
]
)

AC_MSG_CHECKING(whether to build for macosx)
case $host in
  *-darwin*)
    osx_support=yes
    AC_MSG_RESULT(yes)
    AC_DEFINE_UNQUOTED(__MacOSX__)
    AC_SUBST(MACOSX)

    AC_CHECK_LIB(IOKit,IOCloseConnection)
    AC_CHECK_HEADER(unistd.h)
    AC_CHECK_FUNCS(optarg getopt optind opterr optopt)
    ;;
  *)
    osx_support=no
    AC_MSG_RESULT(no)
    ;;
esac

AC_MSG_CHECKING(whether to use libusb)
AC_ARG_WITH(libusb,
[  --with-libusb     Include libusb support (default)
  --without-libusb  Don't include libusb support],
[ case "$withval" in
  yes)
    libusb=yes
    ;;
  *)
    libusb=no
    AC_MSG_RESULT(no)
    ;;
  esac],
[
  if test "x$libusb" = "xno"; then
    AC_MSG_RESULT(no)
  fi
]
)

if test "x$libusb" = "xyes"; then
    AC_MSG_RESULT(yes)
    AC_DEFINE_UNQUOTED(WITH_LIBUSB)

    AC_PATH_PROG(LIBUSB_CONFIG,libusb-config)
    if test -n "${LIBUSB_CONFIG}"; then
       CFLAGS="`${LIBUSB_CONFIG} --cflags` $CFLAGS"
       LIBS="`${LIBUSB_CONFIG} --libs` $LIBS"
    else
       AC_MSG_ERROR([Can't find libusb]);
    fi

#    AC_CHECK_HEADER([usb.h],,AC_MSG_ERROR([unable to find usb.h]))
    AC_CHECK_LIB(usb, usb_open)
    AC_SUBST(WITH_LIBUSB)
fi

AM_CONDITIONAL(MACOSX, test "$osx_support" = "yes")
AM_CONDITIONAL(WITH_USBDEVFS, test "$usbdevfs" = "yes")
AM_CONDITIONAL(WITH_LIBUSB, test "$libusb" = "yes")

PACKAGE=rioutil
VERSION=1.4.6

AC_OUTPUT(Makefile librioutil/Makefile include/Makefile src/Makefile man/Makefile spec/Makefile spec/rioutil.spec spec/rioutil-usbdevfs.spec spec/rioutil-libusb.spec man/rioutil.1 linux_driver/Makefile bsd_driver/Makefile debian/Makefile debian/build_dpkg.sh debian/control)