Merge pull request #798 from akohlmey/always-use-internal-xdr

  endif()

endif()

if(ENABLE_MISC)

  option(LAMMPS_XDR "include XDR compatibility files for doing particle dumps in XTC format" OFF)

  if(LAMMPS_XDR)

    add_definitions(-DLAMMPS_XDR) # for liblammps

  endif()

endif()

if(ENABLE_MSCG OR ENABLE_USER-ATC OR ENABLE_USER-AWPMD OR ENABLE_USER-QUIP OR ENABLE_LATTE)

  find_package(LAPACK)

  if(NOT LAPACK_FOUND)

-DLAMMPS_PNG

-DLAMMPS_FFMPEG

-DLAMMPS_MEMALIGN

-DLAMMPS_XDR

-DLAMMPS_SMALLBIG

-DLAMMPS_BIGBIG

-DLAMMPS_SMALLSMALL

bytes instead of 8 bytes on x86 type platforms) for optimal

performance.

If you use -DLAMMPS_XDR, the build will include XDR compatibility

files for doing particle dumps in XTC format.  This is only necessary

if your platform does have its own XDR files available.  See the

Restrictions section of the "dump"_dump.html command for details.

Use at most one of the -DLAMMPS_SMALLBIG, -DLAMMPS_BIGBIG,

-DLAMMPS_SMALLSMALL settings.  The default is -DLAMMPS_SMALLBIG. These

settings refer to use of 4-byte (small) vs 8-byte (big) integers

The {xtc} style is part of the MISC package.  It is only enabled if

LAMMPS was built with that package.  See the "Making

LAMMPS"_Section_start.html#start_3 section for more info.  This is

because some machines may not support the low-level XDR data format

that XTC files are written with, which will result in a compile-time

error when a low-level include file is not found.  Putting this style

in a package makes it easy to exclude from a LAMMPS build for those

machines.  However, the MISC package also includes two compatibility

header files and associated functions, which should be a suitable

substitute on machines that do not have the appropriate native header

files.  This option can be invoked at build time by adding

-DLAMMPS_XDR to the CCFLAGS variable in the appropriate low-level

Makefile, e.g. src/MAKE/Makefile.foo.  This compatibility mode has

been tested successfully on Cray XT3/XT4/XT5 and IBM BlueGene/L

machines and should also work on IBM BG/P, and Windows XP/Vista/7

machines.

LAMMPS"_Section_start.html#start_3 section for more info.

[Related commands:]

#define LMP_DUMP_XTC_H

#include "dump.h"

#ifdef LAMMPS_XDR

#include "xdr_compat.h"

#else

#include "rpc/rpc.h"

#include "rpc/xdr.h"

#endif

namespace LAMMPS_NS {

#ifdef LAMMPS_XDR

#include <stdlib.h>

#include <limits.h>

#include <string.h>

}

#endif

#else

/* satisfy compilers that do not like to compile empty files. */

static void i_am_a_dummy_subroutine(void) {

  return;

}

#endif