On 30 November 2016 at 22:51, Jonathan Wakely <jwak...@redhat.com> wrote: > On 30/11/16 22:32 +0100, Christophe Lyon wrote: >> >> On 30 November 2016 at 20:00, Bernd Edlinger <bernd.edlin...@hotmail.de> >> wrote: >>> >>> Hi, >>> >>> I noticed that a cross-compiler produces an unusable libstdc++.so >>> that contains an unresolved reference to aligned_alloc instead of >>> posix_memalign, or whatever is actually available. >>> >>> Therefore it is impossible to link any C++ programs against the >>> libstdc++.so that comes with the cross-compiler. >>> >>> That happens for instance in the following configuration: >>> --target=arm-linux-gnueabihf. >>> >> >> How could this be unnoticed so far? > > > I did wonder that. > > The newlib config is hardcoded, which probably covers a lot of the > cross builds in regular use. > The config mentioned by Bernd (arm-linux-gnueabihf) does not use newlib. I checked my libstdc++.log files, there's no -static option in use, I don't use --disable-shared, so I'm not sure why there's a problem?
> >>> The attached patch adds a link test for the memalign function >>> and fixes the cross-build for me. >>> >>> Is it OK for trunk? >>> >>> >>> Thanks >>> Bernd.
