# Cross-compile for 64-bit Windows from Linux with mingw-w64 (UCRT).
#   cmake -S . -B build_win -G Ninja -DCMAKE_TOOLCHAIN_FILE=cmake/mingw-w64-x86_64.cmake \
#         -DMINGW_SYSROOT=<dir with include/ lib/ bin/ of MSYS2 ucrt64 packages>
# tools/package_windows.sh downloads that sysroot and runs this for you.
set(CMAKE_SYSTEM_NAME Windows)
set(CMAKE_SYSTEM_PROCESSOR x86_64)
set(CMAKE_C_COMPILER x86_64-w64-mingw32-gcc)
set(CMAKE_CXX_COMPILER x86_64-w64-mingw32-g++)
set(CMAKE_RC_COMPILER x86_64-w64-mingw32-windres)

set(MINGW_SYSROOT "" CACHE PATH "MSYS2 ucrt64 package tree (include/, lib/, bin/)")
set(CMAKE_FIND_ROOT_PATH /usr/x86_64-w64-mingw32 ${MINGW_SYSROOT})
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
# The host's pkg-config would report Linux libraries.
set(CMAKE_DISABLE_FIND_PACKAGE_PkgConfig ON)