https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81253
--- Comment #4 from Philipp <kidon at posteo dot de> --- I use the official FreeBSD port for building GCC 6: http://www.freshports.org/lang/gcc6 The dependencies are resolved automatically. I did not recompile them with altered flags (all libraries are build without additional CFLAGS). The following options have been used for building GCC 6: BOOTSTRAP=on (Build using a full bootstrap) GRAPHITE=off (Support for Graphite loop optimizations) JAVA=off (Java platform support) The libraries are linked dynamically.