How to cross-compile libcxx and libgcc?

[darealshinji]

I was trying to create a cross-build environment for the target x86_64-w64-mingw32 that was independent from GCC. Replacements for libstdc++ and libgcc were only missing, but when I try to build them here from scratch, cmake is testing if an executable can be compiled and linked and therefor fails, since the libraries I'm trying to build are missing.
Is there no way to skip this test in cmake? -DBUILD_SHARED_LIBS=OFF doesn't help.

[trcrsired]

https://github.com/trcrsired/toolchainbuildscripts/blob/main/llvm/x86_64-windows-gnu.sh

here is my script

And binaries are here
https://github.com/trcrsired/llvm-releases/releases
https://github.com/trcrsired/windows-msvc-sysroot

[darealshinji]

https://github.com/trcrsired/toolchainbuildscripts/blob/main/llvm/x86_64-windows-gnu.sh

here is my script

And binaries are here https://github.com/trcrsired/llvm-releases/releases https://github.com/trcrsired/windows-msvc-sysroot

Same issue. Some of the checks fail because -lgcc_s can't be found.