[vtkusers] Build error, VTK 6.2, Mac OS X 10.10.4, GCC 4.9

Sean McBride sean at rogue-research.com
Wed Jul 8 13:48:14 EDT 2015

On Tue, 7 Jul 2015 17:09:31 +0000, Bosler, Peter Andrew said:

>/usr/include/dispatch/object.h:143:15: error: expected identifier or '('
>before '^' token
> typedef void (^dispatch_block_t)(void);
>               ^

That caret indicates what's known as a "block", see:

Probably gcc 4.9 doesn't support blocks.  Maybe a newer gcc does?  Also, the system headers in OS 10.10 maybe now assume that the compiler supports blocks, whereas the 10.9 headers maybe had #if cases to build without block support.  You could try building against the 10.9 SDK instead (use CMAKE_OSX_SYSROOT).  Or use clang instead of gcc.


Sean McBride, B. Eng                 sean at rogue-research.com
Rogue Research                        www.rogue-research.com 
Mac Software Developer              Montréal, Québec, Canada

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