dnl Process this file with autoconf to produce a configure script.

AC_INIT(configure.in)
AM_INIT_AUTOMAKE(NIST, 0.6)
AM_CONFIG_HEADER(config.h)

dnl do the macros
AM_ACLOCAL_INCLUDE(macros)

dnl check host
AC_CANONICAL_HOST

CFLAGS="$CFLAGS -Wall -O3"
CXXFLAGS="$CXXFLAGS -Wall -O6"

dnl Checks for programs.
AC_PROG_AWK
AC_PROG_CC
AC_PROG_CXX
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_RANLIB

dnl the video makefile wants nasm
dnl should probably just use more portable assembly
dnl FIXME: this should only be called if we're using asm!
AC_CHECK_PROG(have_nasm, nasm, yes, no)
if test "x$have_nasm" = "xno"; then
  echo "  you will need nasm to build the mmx code on x86 platforms"
  echo "  others may safely ignore this."
fi

AC_ARG_ENABLE(debug, [  --enable-debug=[no/yes] turn on debugging [default=no]],echo $enable_debug, enable_debug="no")
AC_ARG_ENABLE(profile, [  --enable-profile=[no/yes] turn on profiling [default=no]], echo $enable_profile, enable_profile="no")
AC_ARG_ENABLE(shm, [  --enable-shm            support shared memory if available [default=yes]],
		   echo $enable_shm, enable_shm="yes")
AC_ARG_ENABLE(Xdga, [  --enable-Xdga=[no/yes] turn on debugging [default=no]],echo $enable_Xdga, enable_Xdga="no")

dnl Checks found in macros
GNOME_PTHREAD_CHECK

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

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_C_INLINE
AC_TYPE_SIZE_T
AC_HEADER_TIME

dnl Checks for library functions.
AC_FUNC_ALLOCA
AC_PROG_GCC_TRADITIONAL
AC_TYPE_SIGNAL
AC_CHECK_FUNCS(gettimeofday re_comp regcomp select socket strdup strerror)

# Find the X11 include and library directories
AC_PATH_X
AC_PATH_XTRA

if test "x$x_includes" = "x"; then
  x_includes="/usr/include"
fi

CFLAGS="$CFLAGS $X_CFLAGS"
LDFLAGS="$LDFLAGS $X_LDFLAGS $X_LIBS"

if test "x$no_x" = "xyes"; then 
  AC_MSG_ERROR([
*** X libraries or include files not found. Check 'config.log' for 
*** more details.])
fi

# Check for the X11 library
AC_CHECK_LIB(X11, XOpenDisplay, x_libs="-lX11 $X_EXTRA_LIBS", 
  AC_MSG_ERROR([*** libX11 not found. Check 'config.log' for more details.]),
  $X_EXTRA_LIBS)

if test "x$enable_shm" = "xyes"; then
  # Check for the Xext library (needed for XShm extention)
  AC_CHECK_LIB(Xext, XShmAttach, 
      x_libs="-lXext $x_libs"
      x_cflags="$x_cflags -DSH_MEM",
      # On AIX, it is in XextSam instead, but we still need -lXext
      AC_CHECK_LIB(XextSam, XShmAttach, 
          x_libs="-lXextSam -lXext $x_libs", 
          no_xext_lib=yes, $x_libs),
      $x_libs)
fi

#dnl checks for using dga
#if test "$enable_Xdga" = yes; then
#	echo "DGA graphic is not currently supported"; exit 1;
#	cp ./src/Video/display.cc.openptc ./src/Video/display.cc
#	AC_PATH_PROG(ptcpath, ptc-config)
#	AC_MSG_CHECKING(for OpenPTC)
#	PTC_CFLAGS=`$ptcpath --cflags 2>/dev/null`
#	PTC_LIBS=`$ptcpath --libs`
#	if test "_$PTC_CFLAGS" = "_" ; then
#		AC_MSG_RESULT([not found, building without PTC.])
#	else
#		AC_MSG_RESULT(ok)
#		PTC_CFLAGS="$PTC_CFLAGS -DUSE_DGA"
		AC_SUBST(PTC_CFLAGS)
		AC_SUBST(PTC_LIBS)
#	fi
#else
#	cp ./src/Video/display.cc.x11 ./src/Video/display.cc
#fi

dnl
if test "x$enable_debug" = "xyes"; then
   CFLAGS="$CFLAGS -g"
   CXXFLAGS="$CXXFLAGS -g"
fi

if test "$enable_profile" = "yes"; then
   CFLAGS="$CFLAGS -p"
   CXXFLAGS="$CXXFLAGS -p"
fi

dnl may need to change these next checks
AC_MSG_CHECKING([for MMX])
if test "x$GCC" = "xyes"; then
  case "$host" in
  i*86-pc-linux*) 
    AC_MSG_RESULT(yes)
    CFLAGS="$CFLAGS -DHAVE_MMX -DLINUX -march=i686 -fschedule-insns2 -malign-double" 
    CXXFLAGS="$CXXFLAGS -DHAVE_MMX -DLINUX -march=i686 -fschedule-insns2 -malign-double"
    mmx_sources="yuv12-rgb16.s reconmmx.s mmxidct.S"
    mmx_objects="yuv12-rgb16.o reconmmx.o mmxidct.o"
    test ! -d lib && mkdir lib
    test ! -d lib/linux && mkdir lib/linux;;
  powerpc-*-linux-gnu*)
    AC_MSG_RESULT(no)
    CFLAGS="$CFLAGS -DLINUX" 
    CXXFLAGS="$CXXFLAGS -DLINUX";;
  *)  echo "$host is not currently supported"; exit 1;;
  esac
fi

AC_SUBST(x_cflags)
AC_SUBST(x_includes)
AC_SUBST(x_ldflags)
AC_SUBST(x_libs)
AC_SUBST(mmx_sources)
AC_SUBST(mmx_objects)

dnl Run configure in AC3
AC_CONFIG_SUBDIRS(src/ac3)

AC_OUTPUT([
macros/Makefile
src/util/Makefile 
src/buffer/Makefile 
src/video/Makefile  
src/audio/Makefile 
src/demux/Makefile
src/Makefile
Makefile
])