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anlex N 70844c8af4 [MinGW] Fix mingw building issues

Fix config, missing header and command flags issues
Add MinGW tutorial about how to build `gn` and "examples/simple_build"

Change-Id: I3761dde6af96a2b61dfa19f339fac97b55ceb186
Reviewed-on: https://gn-review.googlesource.com/c/gn/+/17182
Reviewed-by: Takuto Ikuta <tikuta@google.com>
Reviewed-by: David Turner <digit@google.com>
Commit-Queue: David Turner <digit@google.com>

2024-05-29 08:03:12 +00:00

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Building and using `gn` with MinGW on Windows

At the time of writing: 2024-04-13 Test environment: Windows 11, intel x86_64 CPU

Requirements

Install MSYS2
Start a Terminal windows for MSYS2's MinGW development by opening one of clang32.exe, clang64.exe, clangarm64.exe,mingw32.exe, mingw64.exe, ucrt64.exe.
To download clang toolchain, Ninja and git programs, run command: pacman -S mingw-w64-clang-x86_64-toolchain mingw-w64-clang-x86_64-ninja git

Build `gn`

To clone gn source code, run command: git clone https://gn.googlesource.com/gn
Run command: cd gn
Run command: build/gen.py --platform mingw
This configuration generates a static executable that does not depend on MSYS2, and can be run in any development environment.
Use --help flag to check more configuration options.
Use --allow-warning flag to build with warnings.
Run command: ninja -C out

Testing

Run command: out/gn --version
Run command: out/gn_unittests

Notes:

For "mingw-w64-clang-x86_64-toolchain" in the clang64 environment, g++ is a copy of clang++.

The toolchain that builds gn does not use vendor lock-in compiler command flags, so gn can be built with these clang++, g++.

However the build rules in examples/simple_build require GCC-specific compiler macros, and thus only work in the ucrt64 MSYS2 development environment.