http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56909
--- Comment #7 from Arthur Zhang <mail2arthur at gmail dot com> 2013-04-14 04:12:35 UTC --- clarification: On MinGW, GCC 4.7.x Ada built successfully with default (no -with-arch or -with-tune) configure. GCC 4.8.0 s-atopri.* changes breaks same configure: 1. with default (no -with-arch or -with-tune): failed with five undefined reference (as the top of this ticket) 2. with '--with-arch=i486 --with-tune=i686': failed with two undefined reference (as comment 1) 3. with '--with-arch=i686': build successfully (as comment 3). this may slow the compiler, and leave i384/i486 arch not be supported so we are looking for a better build workaround or even better a fix from gcc/ada/libgnat.