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<div>Good morning,</div>
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<div>I am trying to build VTK 6.2 on a Mac running Yosemite with the GCC 4.9 compilers and OpenMPI 1.8.6, and I get the error below regarding what appears to be a system file.   I had no problems building VTK before upgrading to Yosemite from Mavericks — has
 anyone else run into this problem?</div>
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<div>Thanks for your time,</div>
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<div>Pete Bosler</div>
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<div>[ 15%] Building C object ThirdParty/freetype/vtkfreetype/CMakeFiles/vtkfreetype.dir/src/base/ftbase.c.o</div>
<div>In file included from /usr/include/dispatch/dispatch.h:51:0,</div>
<div>                 from /System/Library/Frameworks/CoreFoundation.framework/Headers/CFStream.h:15,</div>
<div>                 from /System/Library/Frameworks/CoreFoundation.framework/Headers/CFPropertyList.h:13,</div>
<div>                 from /System/Library/Frameworks/CoreFoundation.framework/Headers/CoreFoundation.h:55,</div>
<div>                 from /System/Library/Frameworks/CoreServices.framework/Headers/CoreServices.h:19,</div>
<div>                 from /Users/pabosle/sourceCodes/VTK-6.2.0/ThirdParty/freetype/vtkfreetype/src/base/ftmac.c:100,</div>
<div>                 from /Users/pabosle/sourceCodes/VTK-6.2.0/ThirdParty/freetype/vtkfreetype/src/base/ftbase.c:38:</div>
<div>/usr/include/dispatch/object.h:143:15: error: expected identifier or '(' before '^' token</div>
<div> typedef void (^dispatch_block_t)(void);</div>
<div>               ^</div>
<div>/usr/include/dispatch/object.h:362:3: error: unknown type name 'dispatch_block_t'</div>
<div>   dispatch_block_t notification_block);</div>
<div>   ^</div>
<div>make[2]: *** [ThirdParty/freetype/vtkfreetype/CMakeFiles/vtkfreetype.dir/src/base/ftbase.c.o] Error 1</div>
<div>make[1]: *** [ThirdParty/freetype/vtkfreetype/CMakeFiles/vtkfreetype.dir/all] Error 2</div>
<div>make: *** [all] Error 2</div>
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