suppress cmake rerun

[Duc Truong]

Hi all,

Is there any flag to suppress cmake rerun when running ninja?

Background: I'm running gcc within msys2 mingw64 environment, and somehow broke the build chain cmake - make and cmake - ninja. Ninja always complains about the path

ninja: error: FindFirstFileExA(c:/building/msys64c:/building/msys64/mingw64/lib): The filename, directory name, or volume label syntax is incorrect.

I was trying to patch it via search and replace the path inside the build.ninja file, but when I run ninja to build, it automatically reruns cmake to create unpatched build.ninja file again.

Thanks for any idea how to progress.

[Nico Weber]

Since you're editing the ninja files already, you can temporarily delete the build edge for the cmake invocation. Look for "# Re-run CMake if any of its inputs changed." and delete the "build build.ninja:" line following it (and the `pool = console` in the next line), then build.

But since it looks like cmake generates an invalid ninja file somehow, maybe your inputs to cmake are incorrect and you should try to get cmake generate a correct ninja file instead :-)

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[Claus Klein]

If you are working under msys2, you should prevent dos drive names!

Use only something like „/c/mingw64/lib“ than it will work, I do so.

And prevent the use of dos tools and bat files, you are on a bash shell!

Also do not use the windows version of nina or cmake, use the msy2 version!!!

[Duc Truong]

Thank you - it works. I need to use "ninja" instead of "cmake --build" as well. Funny the whole thing works without patching until I reinstalled the whole msys2 :o

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[Duc Truong]

Yes I use both mingw64/mingw-w64-x86_64-cmake and mingw64/mingw-w64-x86_64-ninja packages on bash shell, with nothing from windows exposed. Everything works until I reinstalled msys2 (renamed the whole folder, reinstall to the original folder).

Just checked, the build.sh does not have any reference to the C drive, yet cmake generates invalid build files for ninja and MSYS Makefile.

[Claus Klein]

This are not the msys versions!

The /usr/bin/cmake is right!

Nina must be build from source at msys shell.

see https://github.com/msys2/msys2/wiki/How-does-MSYS2-differ-from-Cygwin