Compiling for Windows 10

[robert-dzikowski]

I cross compiled on Ubuntu using
cmake .. -DCMAKE_TOOLCHAIN_FILE=../cmake/x86_64-w64-mingw32.toolchain.cmake

and compiled on Windows 10 using

cmake -G "Visual Studio 17 2022" -A x64 -S . -B build
cmake --build build --config RelWithDebInfo

In both cases compiled secp256k1 library causes the following error when I try to run Electrum wallet (https://github.com/spesmilo/electrum) on Windows 10

File "D:\Data\repos\Python\electrum\electrum\ecc_fast.py", line 151, in <module>
    raise ImportError("Failed to load libsecp256k1")
ImportError: Failed to load libsecp256k1
  0.84 | E | ecc_fast | failed to load libsecp256k1: LibModuleMissing('libsecp256k1 library found but it was built without required module (--enable-module-recovery)')

I don't get this error when I compile this library on Ubuntu 22.04.2 LTS using Electrum build script, i.e. Electrum wallet runs without problems on Ubuntu using that compiled library.

[real-or-random]

You need to enable the recovery module, which is disabled by default.

Add -DSECP256K1_ENABLE_MODULE_RECOVERY=ON to the first cmake invocation.

[robert-dzikowski]

I wrote

cmake -G "Visual Studio 17 2022" -A x64 -S . -B build -DSECP256K1_ENABLE_MODULE_RECOVERY=ON

and it worked. Thanks.