zeromq/zmqpp — pull request #64 by jerome-pouiller (2014-09-19 09:47:17+00:00)
Title: Fix compilation with gcc < 4.4

Older version of gcc does not support "enum class" declaration. However,
there is already a macro to fix this compatibility issue:
ZMQPP_COMPARABLE_ENUM. This patch use this macro instead of "enum class"