Add a macos cross-compilation toolchain

examples/totally-free/Toolchain-cross-macos.cmake

@@ -0,0 +1,30 @@
+# the name of the target operating system
+SET(CMAKE_SYSTEM_NAME Windows)
+
+# Choose an appropriate compiler prefix
+# for classical mingw32
+# see http://www.mingw.org/
+#set(COMPILER_PREFIX "i586-mingw32msvc")
+# for 32 or 64 bits mingw-w64
+# see http://mingw-w64.sourceforge.net/
+set(COMPILER_PREFIX "x86_64-w64-mingw32")
+
+# here is the target environment located
+SET(USER_ROOT_PATH /Users/enoulard/MinGW/${COMPILER_PREFIX})
+SET(CMAKE_FIND_ROOT_PATH  /usr/${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)
+
+# which compilers to use for C and C++
+#find_program(CMAKE_RC_COMPILER NAMES ${COMPILER_PREFIX}-windres)
+set(CMAKE_RC_COMPILER /Users/enoulard/MinGW/bin/${COMPILER_PREFIX}-windres)
+#find_program(CMAKE_C_COMPILER NAMES ${COMPILER_PREFIX}-gcc)
+set(CMAKE_C_COMPILER /Users/enoulard/MinGW/bin/${COMPILER_PREFIX}-gcc)
+#find_program(CMAKE_CXX_COMPILER NAMES ${COMPILER_PREFIX}-g++)
+set(CMAKE_CXX_COMPILER /Users/enoulard/MinGW/bin/${COMPILER_PREFIX}-g++)
+
+