ZLIB_USE_EXTERNAL problem

Hdf-forum archives
1

With the latest version configured with latest cmake (linux) I find
that ZLIB_USE_EXTERNAL has a very strange effect. Off by default, I
put it on then it issues an error that ZLIB is required. Only setting
it to off again lets me chose my zlib paths in the GUI.
Anyone with similar symptoms?

Thanks, Dominik

2

Dominik,
   Looks Like I'll need to work on documentation! That OPTION is intended to work with the EXTERNAL_PROJECT of CMake. Here is the relevant CMake code:
INCLUDE (ExternalProject)
OPTION (HDF5_ALLOW_EXTERNAL_SUPPORT "Allow External Library Building" "NO")
OPTION (ZLIB_USE_EXTERNAL "Use External Library Building for ZLIB" 0)
OPTION (SZIP_USE_EXTERNAL "Use External Library Building for SZIP" 0)
IF (HDF5_ALLOW_EXTERNAL_SUPPORT MATCHES "SVN" OR HDF5_ALLOW_EXTERNAL_SUPPORT MATCHES "TGZ")
  SET (ZLIB_USE_EXTERNAL 1)
  SET (SZIP_USE_EXTERNAL 1)
  IF (HDF5_ALLOW_EXTERNAL_SUPPORT MATCHES "SVN")
    SET (ZLIB_URL ${ZLIB_SVN_URL})
    SET (SZIP_URL ${SZIP_SVN_URL})
  ELSEIF (HDF5_ALLOW_EXTERNAL_SUPPORT MATCHES "TGZ")
    IF (NOT TGZ_PATH)
      SET (TGZ_PATH ${HDF5_SOURCE_DIR})
    ENDIF (NOT TGZ_PATH)
    SET (ZLIB_URL ${TGZ_PATH}/${ZLIB_TGZ_NAME})
    SET (SZIP_URL ${TGZ_PATH}/${SZIP_TGZ_NAME})
  ENDIF (HDF5_ALLOW_EXTERNAL_SUPPORT MATCHES "SVN")
ENDIF (HDF5_ALLOW_EXTERNAL_SUPPORT MATCHES "SVN" OR HDF5_ALLOW_EXTERNAL_SUPPORT MATCHES "TGZ")

So if you just want to setup the lib and include paths, don't use these OPTIONS.

Allen

···

With the latest version configured with latest cmake (linux) I find
that ZLIB_USE_EXTERNAL has a very strange effect. Off by default, I
put it on then it issues an error that ZLIB is required. Only setting
it to off again lets me chose my zlib paths in the GUI.
Anyone with similar symptoms?

Thanks, Dominik

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@hdfgroup.org
http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org

3

Thanks a lot, but I still do not get it right: what do I need to set
and in what order to 1) enable the ZLIB compression filter and 2) use
my own (or system) provided zlib version?

Regards,
Dominik

···

On Sat, May 28, 2011 at 2:59 PM, Allen D Byrne <byrn@hdfgroup.org> wrote:

Dominik,

Looks Like I'll need to work on documentation! That OPTION is intended to
work with the EXTERNAL_PROJECT of CMake. Here is the relevant CMake code:

INCLUDE (ExternalProject)

OPTION (HDF5_ALLOW_EXTERNAL_SUPPORT "Allow External Library Building" "NO")

OPTION (ZLIB_USE_EXTERNAL "Use External Library Building for ZLIB" 0)

OPTION (SZIP_USE_EXTERNAL "Use External Library Building for SZIP" 0)

IF (HDF5_ALLOW_EXTERNAL_SUPPORT MATCHES "SVN" OR HDF5_ALLOW_EXTERNAL_SUPPORT
MATCHES "TGZ")

SET (ZLIB_USE_EXTERNAL 1)

SET (SZIP_USE_EXTERNAL 1)

IF (HDF5_ALLOW_EXTERNAL_SUPPORT MATCHES "SVN")

SET (ZLIB_URL ${ZLIB_SVN_URL})

SET (SZIP_URL ${SZIP_SVN_URL})

ELSEIF (HDF5_ALLOW_EXTERNAL_SUPPORT MATCHES "TGZ")

IF (NOT TGZ_PATH)

SET (TGZ_PATH ${HDF5_SOURCE_DIR})

ENDIF (NOT TGZ_PATH)

SET (ZLIB_URL ${TGZ_PATH}/${ZLIB_TGZ_NAME})

SET (SZIP_URL ${TGZ_PATH}/${SZIP_TGZ_NAME})

ENDIF (HDF5_ALLOW_EXTERNAL_SUPPORT MATCHES "SVN")

ENDIF (HDF5_ALLOW_EXTERNAL_SUPPORT MATCHES "SVN" OR
HDF5_ALLOW_EXTERNAL_SUPPORT MATCHES "TGZ")

So if you just want to setup the lib and include paths, don't use these
OPTIONS.

Allen

With the latest version configured with latest cmake (linux) I find

that ZLIB_USE_EXTERNAL has a very strange effect. Off by default, I

put it on then it issues an error that ZLIB is required. Only setting

it to off again lets me chose my zlib paths in the GUI.

Anyone with similar symptoms?

Thanks, Dominik

_______________________________________________

Hdf-forum is for HDF software users discussion.

Hdf-forum@hdfgroup.org

http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org

4

Dominik,
     If the ZLIB is in a standard lib path (/usr/lib) then the FINDZLIB.CMAKE module (look in the cmake install folder) should find the lib. This assumes you turned that option on - HDF5_ENABLE_Z_LIB_SUPPORT:BOOL=ON.

Allen

···

Thanks a lot, but I still do not get it right: what do I need to set
and in what order to 1) enable the ZLIB compression filter and 2) use
my own (or system) provided zlib version?

Regards,
Dominik