Configuration - allow cross-compilation from Linux (case sensitive filesystem) to x86_64-w64-mingw32

cmake /path/to/opencascade-7.3.0 \
 -DCMAKE_TOOLCHAIN_FILE=./toolchain-mingw \
 -DINSTALL_DIR:PATH="/path/to/opencascade-7.3.0-mingw-install" \
 -DINSTALL_DIR_BIN:PATH="bin" \
 -DBUILD_MODULE_ApplicationFramework:BOOL="0" \
 -DBUILD_MODULE_Draw:BOOL="0" \
 -DBUILD_MODULE_Visualization:BOOL="0"

$ cat toolchain-mingw
# the name of the target operating system
SET(CMAKE_SYSTEM_NAME Windows)
SET(COMPILER_PREFIX "x86_64-w64-mingw32")

# which compilers to use for C and C++
find_program(CMAKE_C_COMPILER NAMES ${COMPILER_PREFIX}-gcc)
find_program(CMAKE_CXX_COMPILER NAMES ${COMPILER_PREFIX}-g++)
find_program(CMAKE_RC_COMPILER NAMES ${COMPILER_PREFIX}-windres)

# here is the target environment located
SET(USER_ROOT_PATH [user path removed]/projets/mingw)
SET(CMAKE_FIND_ROOT_PATH /usr/${COMPILER_PREFIX} ${USER_ROOT_PATH})

# adjust the default behaviour of the FIND_XXX() commands:
# search headers and libraries in the target environment, search
# programs in the host environment
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)