Add toolchain file for MinGW64

mingw-w64-toolchain.cmake

@@ -0,0 +1,33 @@
+# Toolchain file for 64-bit MinGW build on *nix
+# Developed for use with Debian and its derivatives
+#
+# Copyright 2019 Collabora, Ltd.
+# SPDX-License-Identifier: BSL-1.0
+
+set(CMAKE_SYSTEM_NAME "Windows")
+
+set(TARGET x86_64-w64-mingw32)
+set(PREFIX ${TARGET}-)
+set(SUFFIX -posix) # required for
+set(CMAKE_C_COMPILER ${PREFIX}gcc${SUFFIX})
+set(CMAKE_CXX_COMPILER ${PREFIX}g++${SUFFIX})
+set(CMAKE_RC_COMPILER ${PREFIX}windres)
+
+set(CMAKE_C_COMPILER_AR ${PREFIX}gcc-ar${SUFFIX})
+set(CMAKE_CXX_COMPILER_AR ${PREFIX}gcc-ar${SUFFIX})
+set(CMAKE_C_COMPILER_RANLIB ${PREFIX}gcc-ranlib${SUFFIX})
+set(CMAKE_CXX_COMPILER_RANLIB ${PREFIX}gcc-ranlib${SUFFIX})
+set(CMAKE_NM ${PREFIX}gcc-nm${SUFFIX})
+set(CMAKE_OBJCOPY ${PREFIX}objcopy)
+set(CMAKE_OBJDUMP ${PREFIX}objdump)
+set(CMAKE_RANLIB ${PREFIX}ranlib)
+set(CMAKE_STRIP ${PREFIX}strip)
+
+if(NOT CMAKE_INSTALL_PREFIX)
+ set(CMAKE_INSTALL_PREFIX /usr/${TARGET})
+endif()
+
+set(CMAKE_FIND_ROOT_PATH /usr/${TARGET})
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)