FWIW: there is something fundamentally wrong with a meta-meta build system. I don't think you should bother generating or wrapping CMake, you should be replacing it.
Cmake is doing a lot of underappreciated work under the hood that would be very hard to replicate in another tool, tons of accumulated workarounds for all the different host operating systems, compiler toolchains and IDEs, it's also one of few build tools which properly support Windows and Visual Studio.
Just alone reverse engineering the Xcode and Visual Studio project file formats for each IDE version isn't fun, but this "boring" grunt work is what makes cmake so valuable.
The core ideas of cmake are sound, it's only the scripting language that sucks.
Do your Makefiles work across Linux, macOS and Windows (without WSL or MingW), GCC, Clang and MSVC, or allow loading the project into an IDE like Xcode or Visual Studio though? That's why meta-build-systems like cmake were created, not to be a better GNU Make.
Ok, then just cl.exe instead of gcc or clang. Completely different set of command line options from gcc and clang, but that's fine. C/C++ build tooling needs to be able to deal with different toolchains. The diversity of C/C++ toolchains is a strength, not a weakness :)
One nice feature of MSVC is that you can describe the linker dependencies in the source files (via #pragma comment(lib, ...)), this enables building fairly complex single-file tools trivially without a build system like this:
cl mytool.c
...without having to specify system dependencies like kernel32 etc... on the cmdline.
Just alone reverse engineering the Xcode and Visual Studio project file formats for each IDE version isn't fun, but this "boring" grunt work is what makes cmake so valuable.
The core ideas of cmake are sound, it's only the scripting language that sucks.