From-SVN: r195165
PR bootstrap/54609 * unknown.c (unknown_fileline): Add state parameter, remove fileline_data parameter, name error_callback parameter. (backtrace_initialize): Add state parameter. From-SVN: r191402
* Initial implementation. ./: * MAINTAINERS (Various Maintainers): Add libbacktrace. * configure.ac (host_libs): Add libbacktrace. (target_libraries): Add libbacktrace. * Makefile.def (host_modules): Add libbacktrace. (target_modules): Likewise. * configure, Makefile.in: Rebuild. gcc/go: * config-lang.in (target_libs): Add target-libbacktrace. From-SVN: r191397