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GCC recently added support for the Windows thread model, enabling libstdc++ to support Windows natively. However, this supporrt requires a version of Windows later than the minimum version that is supported by GDB. PR build/29966 points out that the GDB configure test for std::thread does not work in this situation, because _WIN32_WINNT is not defined in test program, and so <thread> seems to be fine. This patch is an attempt to fix the problem, by using the same setting for _WIN32_WINNT at configure time as is used at build time. I don't have access to one of the older systems so I don't think I can truly test this. I did do a mingw cross build, though. I'm going to ask the bug reporter to test it. Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29966
README for GNU development tools This directory contains various GNU compilers, assemblers, linkers, debuggers, etc., plus their support routines, definitions, and documentation. If you are receiving this as part of a GDB release, see the file gdb/README. If with a binutils release, see binutils/README; if with a libg++ release, see libg++/README, etc. That'll give you info about this package -- supported targets, how to use it, how to report bugs, etc. It is now possible to automatically configure and build a variety of tools with one command. To build all of the tools contained herein, run the ``configure'' script here, e.g.: ./configure make To install them (by default in /usr/local/bin, /usr/local/lib, etc), then do: make install (If the configure script can't determine your type of computer, give it the name as an argument, for instance ``./configure sun4''. You can use the script ``config.sub'' to test whether a name is recognized; if it is, config.sub translates it to a triplet specifying CPU, vendor, and OS.) If you have more than one compiler on your system, it is often best to explicitly set CC in the environment before running configure, and to also set CC when running make. For example (assuming sh/bash/ksh): CC=gcc ./configure make A similar example using csh: setenv CC gcc ./configure make Much of the code and documentation enclosed is copyright by the Free Software Foundation, Inc. See the file COPYING or COPYING.LIB in the various directories, for a description of the GNU General Public License terms under which you can copy the files. REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info on where and how to report problems.