http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57350
--- Comment #4 from David Krauss <potswa at mac dot com> --- Hmm, I recall preparing to submit a patch but not being able to decide which header to modify. Here's the aforementioned MIT-licensed code. The MIT license only requires attribution which is satisfied by the changelog; anyway I don't care. I am already a GNU contributor with FSF waiver back in 2009. This code should probably be reviewed. I wrote it a long time ago and seldom used it. Cannot recall whether it was intended to be 100% compliant. inline void *align( std::size_t alignment, std::size_t size, void *&ptr, std::size_t &space ) { auto pn = reinterpret_cast< std::size_t >( ptr ); auto aligned = ( pn + alignment - 1 ) & - alignment; auto new_space = space - ( aligned - pn ); if ( new_space < size ) return nullptr; space = new_space; return ptr = reinterpret_cast< void * >( aligned ); }