FreeBSD ia64 build failure in libIlmImf.la: _ZTSN7Imf_2_112_GLOBAL__N_114LineBufferTaskE defined in discarded section

Hi

I'm new to this list.
The OpenEXR-2.1.0 build failure on FreeBSD ia64
blocks about 10 other ports. The full build log:

http://eis.bris.ac.uk/~mexas/logs/OpenEXR-2.1.0_3.log

The error:

libtool: link: c++ -shared -nostdlib /usr/lib/crti.o /usr/lib/crtbeginS.o  .libs/ImfAttribute.o .libs/ImfBoxAttribute.o .libs/ImfCRgbaFile.o .libs/ImfChannelList.o .libs/ImfChannelListAttribute.o .libs/ImfFloatAttribute.o .libs/ImfFrameBuffer.o .libs/ImfHeader.o .libs/ImfIO.o .libs/ImfInputFile.o .libs/ImfIntAttribute.o .libs/ImfLineOrderAttribute.o .libs/ImfMatrixAttribute.o .libs/ImfOpaqueAttribute.o .libs/ImfOutputFile.o .libs/ImfRgbaFile.o .libs/ImfStringAttribute.o .libs/ImfVecAttribute.o .libs/ImfHuf.o .libs/ImfThreading.o .libs/ImfWav.o .libs/ImfLut.o .libs/ImfCompressor.o .libs/ImfRleCompressor.o .libs/ImfZipCompressor.o .libs/ImfPizCompressor.o .libs/ImfB44Compressor.o .libs/ImfMisc.o .libs/ImfCompressionAttribute.o .libs/ImfDoubleAttribute.o .libs/ImfConvert.o .libs/ImfPreviewIma
 ge.o .libs/ImfPreviewImageAttribute.o .libs/ImfVersion.o .libs/ImfChromaticities.o .libs/ImfChromaticitiesAttribute.o .libs/ImfKeyCode.o .libs/ImfKeyCodeAttribute.o .libs/ImfTimeCode.o .libs/ImfTimeCodeAttribute.o .libs/ImfRational.o .libs/ImfRationalAttribute.o .libs/ImfFramesPerSecond.o .libs/ImfStandardAttributes.o .libs/ImfStdIO.o .libs/ImfEnvmap.o .libs/ImfEnvmapAttribute.o .libs/ImfScanLineInputFile.o .libs/ImfTiledInputFile.o .libs/ImfTiledMisc.o .libs/ImfTiledOutputFile.o .libs/ImfTiledRgbaFile.o .libs/ImfTileDescriptionAttribute.o .libs/ImfTileOffsets.o .libs/ImfRgbaYca.o .libs/ImfPxr24Compressor.o .libs/ImfTestFile.o .libs/ImfStringVectorAttribute.o .libs/ImfMultiView.o .libs/ImfAcesFile.o .libs/ImfMultiPartOutputFile.o .libs/ImfGenericOutputFile.o .libs/ImfOutputPartData.o .li
 bs/ImfMultiPartInputFile.o .libs/ImfGenericInputFile.o .libs/ImfPartType.o .libs/ImfInputPartData.o .libs/ImfOutputPart.o .libs/ImfTiledOutputPart.o .libs/ImfInputPart.o .libs/ImfTiledInputPart.o .libs/ImfDeepScanLineInputPart.o .libs/ImfDeepScanLineOutputPart.o .libs/ImfDeepScanLineInputFile.o .libs/ImfDeepScanLineOutputFile.o .libs/ImfDeepTiledInputPart.o .libs/ImfDeepTiledOutputPart.o .libs/ImfDeepTiledInputFile.o .libs/ImfDeepTiledOu!
 tputFile.o .libs/ImfDeepFrameBuffer.o .libs/ImfDeepCompositing.o .libs/ImfCompositeDeepScanLine.o .libs/ImfDeepImageStateAttribute.o   -L/usr/local/lib -lz -lImath-2_1 -lIexMath-2_1 -lHalf -lIex-2_1 -lIlmThread-2_1 -L/usr/lib -lstdc++ -lm -lc -lgcc_s /usr/lib/crtendS.o /usr/lib/crtn.o  -pthread -pthread   -pthread -Wl,-soname -Wl,libIlmImf-Imf_2_1.so.21 -o .libs/libIlmImf-Imf_2_1.so.21.0.0
`_ZTSN7Imf_2_112_GLOBAL__N_114LineBufferTaskE' referenced in section `.data.rel.ro' of .libs/ImfScanLineInputFile.o: defined in discarded section `.rodata._ZTSN7Imf_2_112_GLOBAL__N_114LineBufferTaskE[_ZTSN7Imf_2_112_GLOBAL__N_114LineBufferTaskE]' of .libs/ImfScanLineInputFile.o
`_ZTSN7Imf_2_112_GLOBAL__N_114TileBufferTaskE' referenced in section `.data.rel.ro' of .libs/ImfTiledOutputFile.o: defined in discarded section `.rodata._ZTSN7Imf_2_112_GLOBAL__N_114TileBufferTaskE[_ZTSN7Imf_2_112_GLOBAL__N_114TileBufferTaskE]' of .libs/ImfTiledOutputFile.o
`_ZTSN7Imf_2_112_GLOBAL__N_114LineBufferTaskE' referenced in section `.data.rel.ro' of .libs/ImfDeepScanLineInputFile.o: defined in discarded section `.rodata._ZTSN7Imf_2_112_GLOBAL__N_114LineBufferTaskE[_ZTSN7Imf_2_112_GLOBAL__N_114LineBufferTaskE]' of .libs/ImfDeepScanLineInputFile.o
`_ZTSN7Imf_2_112_GLOBAL__N_114LineBufferTaskE' referenced in section `.data.rel.ro' of .libs/ImfDeepScanLineOutputFile.o: defined in discarded section `.rodata._ZTSN7Imf_2_112_GLOBAL__N_114LineBufferTaskE[_ZTSN7Imf_2_112_GLOBAL__N_114LineBufferTaskE]' of .libs/ImfDeepScanLineOutputFile.o
`_ZTSN7Imf_2_112_GLOBAL__N_114TileBufferTaskE' referenced in section `.data.rel.ro' of .libs/ImfDeepTiledInputFile.o: defined in discarded section `.rodata._ZTSN7Imf_2_112_GLOBAL__N_114TileBufferTaskE[_ZTSN7Imf_2_112_GLOBAL__N_114TileBufferTaskE]' of .libs/ImfDeepTiledInputFile.o
`_ZTSN7Imf_2_112_GLOBAL__N_114TileBufferTaskE' referenced in section `.data.rel.ro' of .libs/ImfDeepTiledOutputFile.o: defined in discarded section `.rodata._ZTSN7Imf_2_112_GLOBAL__N_114TileBufferTaskE[_ZTSN7Imf_2_112_GLOBAL__N_114TileBufferTaskE]' of .libs/ImfDeepTiledOutputFile.o
gmake[3]: *** [libIlmImf.la] Error 1
gmake[3]: Leaving directory `/wrkdirs/usr/ports/graphics/OpenEXR/work/openexr-2.1.0/IlmImf'
gmake[2]: *** [all] Error 2
gmake[2]: Leaving directory `/wrkdirs/usr/ports/graphics/OpenEXR/work/openexr-2.1.0/IlmImf'
gmake[1]: *** [all-recursive] Error 1
gmake[1]: Leaving directory `/wrkdirs/usr/ports/graphics/OpenEXR/work/openexr-2.1.0'
*** Error code 1


The maintainer of the OpenEXR port could not help,
for reference, here's the FreeBSD PR:
http://www.freebsd.org/cgi/query-pr.cgi?pr=ports/188117

So asking for help here.
Please help

Many thanks

Anton