AC_PREREQ([2.60])
AC_INIT([nanovis], [1.1], [rappture@nanohub.org])
AC_CONFIG_AUX_DIR(cf)
AC_CONFIG_HEADERS([nvconf.h])

AC_ARG_WITH(
    [tcllib],
    [AS_HELP_STRING([--with-tcllib[=DIR]],
        [location of Tcl binary library libtclstubs.a @<:@default=/usr/lib@:>@])],
    [with_tcllib=$withval],
    [with_tcllib=""])

AC_ARG_WITH(
    [rappture],
    [AS_HELP_STRING([--with-rappture[=DIR]],
        [location of rappture files lib/librappture.a and include/rappture.h @<:@default=/usr@:>@])],
    [with_rappture=$withval],
    [with_rappture=yes])

AC_ARG_WITH(
    [ffmpeg],
    [AS_HELP_STRING([--with-ffmpeg[=DIR]],
      [location of ffmpeg @<:@default=yes@:>@])],
    [],
    [with_ffmpeg=yes])

AC_ARG_WITH(
    [statsdir],
    [AS_HELP_STRING([--with-statsdir=DIR],
        [Write statistics in DIR])],
    [STATSDIR=$withval],
    [STATSDIR="/var/tmp/visservers"])

#------------------------------------------------------------------------
# Handle the --prefix=... option
#------------------------------------------------------------------------

if test "${prefix}" = "NONE"; then
    prefix=/usr/local
fi
if test "${exec_prefix}" = "NONE"; then
    exec_prefix=$prefix
fi

if test "x${incdir}" == "x"; then
  incdir=${exec_prefix}/include
fi
libdir=${exec_prefix}/lib

if test "${libdir}" != "${prefix}/lib"; then
    LIB_SEARCH_DIRS="-L ${prefix}/lib -L ${libdir}"
else
    LIB_SEARCH_DIRS="-L ${libdir}"
fi

AC_PROG_INSTALL
AC_PROG_RANLIB
AC_PROG_LN_S
AC_PROG_MKDIR_P

dnl find and test the C compiler
AC_PROG_CC
AC_PROG_CPP
AC_PROG_CXXCPP
AC_PROG_CXX
AC_LANG_CPLUSPLUS

AC_C_BIGENDIAN

# Save the values as shell variables so that we can substitute them
# into bltHash.h for situtations where there's no bltInt.h.


LD_RPATH="";

#
# Need to check for the following dependencies:
#	Rappture headers and library (done)
#       Tcl headers and library (done)
#       GL headers and library
#       GLuT headers and library
#       GLEW header and library
#       Cg headers and library
#       CgGL headers and library
#       pthread library
#       ffmpeg headers and library (started)
#

TCL_VERSION="8.4"
for dir in \
 ${exec_prefix} \
 ${exec_prefix}/lib \
 ${with_rappture} \
 ${with_rappture}/lib ; do
  tclconfig="${dir}/tclConfig.sh"
  if test -f "$tclconfig" ; then
    . $tclconfig
    break
  fi
done
TCL_INC_SPEC="$TCL_INCLUDE_SPEC"

if test "x$with_tcllib" != "x" ; then
   tclconfig="${with_tcllib}/tclConfig.sh"
   if test -f "$tclconfig" ; then
    . $tclconfig
   fi
   TCL_LIB_SPEC="-L${with_tcllib} -ltcl${TCL_VERSION}"
fi
if test "x$with_tclinclude" != "x" ; then
   TCL_INC_SPEC="-I${with_tclinclude}"
fi

RP_DIR=""
AC_MSG_CHECKING([for rappture])
if test "$with_rappture" == "yes" ; then
  for dir in "$exec_prefix" "/usr" ; do
    if test -r "$dir/include/rappture2/rappture2.h" -a \
     -r "$dir/lib/librappture.a"; then
      RP_DIR="$dir"
      RP_INC_SPEC="-I$dir/include -I$dir/include/rappture2"
      RP_LIB_DIR="$dir/lib"
      AC_MSG_RESULT([$dir])
      break
    fi
  done
else
  if test ! -d "$with_rappture" ; then 
    AC_MSG_ERROR([--with-rappture: no such directory $with_rappture])
  fi
  RP_DIR=$with_rappture
  RP_INC_SPEC="-I$with_rappture/include -I$with_rappture/include/rappture2"
  RP_LIB_DIR="$with_rappture/lib"
fi
if test "x${RP_DIR}" = "x" ; then
  AC_MSG_ERROR([cannot find rappture.h and librappture2.a, try using --with-rappture])
else
  AC_MSG_RESULT([$with_rappture])
fi

AC_CHECK_HEADER([GL/glut.h])
AC_CHECK_HEADER([GL/glew.h])

AC_CHECK_HEADERS([stdio.h unistd.h stdlib.h string.h sys/types.h])
AC_CHECK_HEADERS([sys/socket.h sys/time.h netinet/in.h arpa/inet.h netdb.h])

AC_CHECK_FUNCS([accept4])

#--------------------------------------------------------------------
# search for ffmpeg executable
#--------------------------------------------------------------------
if test "${with_ffmpeg}" != "no" ; then
  if test "${with_ffmpeg}" = "yes" ; then 
    AC_PATH_PROG(FFMPEG, ffmpeg)
  else 
    AC_PATH_PROG(FFMPEG, ffmpeg, [], [${with_ffmpeg}/bin:${with_ffmpeg}])
  fi 
  if test "${FFMPEG}x" != "x" ; then
    AC_DEFINE(HAVE_FFMPEG, 1, [nanovis can use ffmpeg to create videos.])
  fi
fi

AC_MSG_CHECKING([for nVidia Cg installation])
CG_DIR=""
for dir in \
 /opt/nvidia-cg-toolkit \
 /usr/cg \
 /usr
do
  if test -r "$dir/include" ; then
    CG_DIR=$dir
    break
  fi
done
AC_MSG_RESULT([${CG_DIR}])

CG_INC_SPEC="-I${CG_DIR}/include"

save_CPPFLAGS=$CPPFLAGS
CPPFLAGS="${CG_INC_SPEC} $CPPFLAGS"
AC_CHECK_HEADERS([Cg/cgGL.h], [], AC_MSG_WARN([cannot find nVidia Cg headers]))
CPPFLAGS=$save_CPPFLAGS

CG_LIB_DIR=""
for dir in \
 /opt/nvidia-cg-toolkit \
 /usr/cg \
 /usr
do
  if test -r "$dir/lib" ; then
    CG_LIB_DIR=$dir/lib
    break
  fi
  if test -r "$dir/lib64" ; then
    CG_LIB_DIR=$dir/lib64
    break
  fi
done

if test "${CG_LIB_DIR}" = "/usr/lib" ; then
  CG_INC_SPEC=""
  CG_LIB_SPEC="-lCg -lCgGL"
else 
  CG_LIB_SPEC="-L${CG_LIB_DIR} -lCg -lCgGL"
  LD_RPATH="$loader_run_path:${CG_LIB_DIR}"
fi

AC_SUBST(CG_INC_SPEC)
AC_SUBST(CG_LIB_SPEC)
AC_SUBST(FFMPEG)
AC_SUBST(LD_RPATH)
AC_SUBST(RP_DIR)
AC_SUBST(RP_INC_SPEC)
AC_SUBST(RP_LIB_DIR)
AC_SUBST(STATSDIR)
AC_SUBST(TCL_INC_SPEC)
AC_SUBST(TCL_LIB_SPEC)
AC_SUBST(TCL_VERSION)

AC_OUTPUT([
   Doxyfile \
   Makefile \
   graphics/Makefile \
   imgLoaders/Makefile \
   newmat11/Makefile \
   util/Makefile \
   vrmath/Makefile])