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Prior to 591c4b64b3650884c2c68eb47d755ebb62981b99, the mingw specific linker options -mthreads, -mconsole, -mwindows and -mdll would be tolerated also at compile time, but generating a warning about being unused. After that commit, they were marked as target specific, which means that it's an error if they're unused (which would consider them used for the wrong target). These specific options are only relevant when linking, but we want to tolerate them at compile time too, like before. This was fixed for -mthreads in a79995ca6004082774a87f7a58ab6be5343364b7, while the other options didn't seem to be commonly used during compilation. After the 17.x release, we've got more reports about this actually being an issue, in #64464. Therefore, apply the same fix for them; marking them as tolerated for mingw targets during compilation, even if they're unused. Also add a testcase for -mthreads which was already handled. Thus, this fixes #64464. (cherry picked from commit e39de2b8862ae43459324da84279366997265078) Adapted from the original commit; the test in the original commit depended on f39c399d9d15efe8309d8aa3d0ecf62205e6c474. Instead of using -###, when we're not actually using the printed output of -###, instead use -fdriver-only.
//===----------------------------------------------------------------------===// // C Language Family Front-end //===----------------------------------------------------------------------===// Welcome to Clang. This is a compiler front-end for the C family of languages (C, C++, Objective-C, and Objective-C++) which is built as part of the LLVM compiler infrastructure project. Unlike many other compiler frontends, Clang is useful for a number of things beyond just compiling code: we intend for Clang to be host to a number of different source-level tools. One example of this is the Clang Static Analyzer. If you're interested in more (including how to build Clang) it is best to read the relevant web sites. Here are some pointers: Information on Clang: http://clang.llvm.org/ Building and using Clang: http://clang.llvm.org/get_started.html Clang Static Analyzer: http://clang-analyzer.llvm.org/ Information on the LLVM project: http://llvm.org/ If you have questions or comments about Clang, a great place to discuss them is on the Clang forums: https://discourse.llvm.org/c/clang/ If you find a bug in Clang, please file it in the LLVM bug tracker: http://llvm.org/bugs/