[Insight-developers] WrapITK GCC_XML Argument list too long issue

[Bradley Lowekamp]

Hello,

Some WrapITK builds are producing the following error:


"../../Generators/GccXML/gccxml/bin/gccxml" "-fxml-start=_cable_" "-fxml=/playpen/blowekamp/MacOSX-WrapITK/ITK-build/Wrapping/Modules/ITKFiniteDifference/itkDenseFiniteDifferenceImageFilter.xml" "--gccxml-gcc-options" "/playpen/blowekamp/MacOSX-WrapITK/ITK-build/Wrapping/Modules/ITKFiniteDifference/gcc_xml.inc" "-DCSWIG" "-DCABLE_CONFIGURATION" "-DITK_MANUAL_INSTANTIATION" "/playpen/blowekamp/MacOSX-WrapITK/ITK-build/Wrapping/Modules/ITKFiniteDifference/itkDenseFiniteDifferenceImageFilter.cxx"

Error: Could not run /playpen/blowekamp/MacOSX-WrapITK/ITK-build/Wrapping/Generators/GccXML/gccxml/bin/gccxml_cc1plus:
Argument list too long

The likely problem is in the file gcc_xml.inc, which is over 400kb is size exceeding the 256kb ARG_MAX limit.


Now the systems that don't seem to be reporting this error  have enabled ITK_USE_CCACHE. To here is the difference in the command:


  if(ITK_USE_CCACHE)
    add_custom_command(
      OUTPUT ${xml_file}
      COMMAND "${CCACHE_EXECUTABLE}" "${GCCXML}"
            -c
            -fxml-start=_cable_
            -o ${xml_file}
            ${CONFIG_GCCXML_INC_CONTENTS}
            -DCSWIG
            -DCABLE_CONFIGURATION
            -DITK_MANUAL_INSTANTIATION
            ${cxx_file}
      DEPENDS ${GCCXML} ${cxx_file}
    )
  else(ITK_USE_CCACHE)
    add_custom_command(
      OUTPUT ${xml_file}
      COMMAND ${GCCXML}
            -fxml-start=_cable_
            -fxml=${xml_file}
            --gccxml-gcc-options ${gccxml_inc_file}
            -DCSWIG
            -DCABLE_CONFIGURATION
            -DITK_MANUAL_INSTANTIATION
            ${cxx_file}
      DEPENDS ${GCCXML} ${cxx_file} ${gccxml_inc_file}
    )
  endif(ITK_USE_CCACHE)

I am not sure what the solution to this problem is. But I think it's a lower priority for the release, so I am mostly posting to recored what I know, and see if there is an obvious solution to some one else.

Brad


========================================================
Bradley Lowekamp  
Medical Science and Computing for
Office of High Performance Computing and Communications
National Library of Medicine 
blowekamp at mail.nih.gov



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