WinLibs (MCF threads, UCRT runtime)

by Brecht Sanders

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Versions:

  • 15.1.0-12.0.0-r1
  • 14.2.0-12.0.0-r1

WinLibs 15.1.0-12.0.0-r1 is a self-contained distribution of the GCC and MinGW-w64 toolchains that provides a free, native C and C++ compiler environment for 32-bit and 64-bit Microsoft Windows systems. Built with the lightweight MCF threading library and linked against the modern UCRT runtime, the package targets developers who need to produce Windows binaries without relying on Microsoft’s proprietary compiler. In addition to the GNU Compiler Collection for languages such as C, C++, Objective-C, Fortran and D, the bundle integrates essential development utilities: GDB debugger, GNU Binutils, GNU Make, the Yasm and NASM assemblers, the MASM-compatible JWasm assembler, and the LLVM/Clang/LLD/LLDB toolchain, giving users a full-featured, command-line-driven build suite. Typical use cases range from compiling open-source projects and porting Unix software to Windows, to teaching C/C++ in academic settings and creating performance-critical libraries that must remain royalty-free. Because the entire stack is compiled to run natively on Windows, no POSIX emulation layer or third-party compatibility shim is required, simplifying continuous-integration pipelines and reducing runtime overhead. The project’s maintainer, Brecht Sanders, offers two parallel release tracks—each identified by distinct version tuples—so that developers can select either the most recent GCC milestone or a proven earlier revision while still benefiting from updated MinGW-w64 runtime fixes. The software is available for free on get.nero.com, with downloads provided via trusted Windows package sources (e.g. winget), always delivering the latest version, and supporting batch installation of multiple applications.

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