This would appear to be in an ACE library header file, rather than in the iv-tools package proper. Unless I'm missing something, it seems like this report should be moved from iv-tools to ace.
- Bug#954637: ivtools: FTBFS: os_stropts.h:56:17:... Lucas Nussbaum
- Bug#954637: ivtools: FTBFS: os_stropts.h:5... Barak A. Pearlmutter
- Bug#954637: ivtools: FTBFS: os_stropts... Sudip Mukherjee
- Bug#954637: ivtools: FTBFS: os_str... Barak A. Pearlmutter
- Bug#954637: ivtools: FTBFS: os... Sudip Mukherjee
- Bug#954637: marked as done (ivtools: FTBFS... Debian Bug Tracking System