[Olena-patches] [Olena] #217: Nasty bug in mln::data::impl::in memcpy_ with g++ 4.2 on Debian GNU/Linux on IA-32

#217: Nasty bug in mln::data::impl::in memcpy_ with g++ 4.2 on Debian GNU/Linux on IA-32 ----------------------+----------------------------------------------------- Reporter: levill_r | Owner: Olena Team Type: defect | Status: new Priority: critical | Milestone: Olena 1.1 Component: Milena | Version: 1.0 Keywords: | ----------------------+----------------------------------------------------- Running the following test exhibits this issue: {{{ make -C milena/apps/graph-morpho CXX="ccache g++-4.2" checkTESTS=samples- image2d TESTS_ENVIRONMENT="valgrind" }}} This seems to be a bug (or a weird implementation-defined behavior) in Debian's `g++` 4.2 on IA-32, due to some strict-aliasing rule not respected in Milena's code. I added a `#warning` in `memcpy_.hh` in r4608. But the thing is, `g++` 4.2 is the main compiler in Debian GNU/Linux 5.0, which is used on most GCC-based Olena buildbots, meaning we won't get a successful build on these hosts until we circumvent this bug. That's bad. -- Ticket URL: <https://trac.lrde.org/olena/ticket/217> Olena <http://olena.lrde.epita.fr> Olena, a generic and efficient C++ image processing library.