Cross toolchain file for cmake

diff --git a/contrib/mingw64cross/mingw-w64.cmake b/contrib/mingw64cross/mingw-w64.cmake
new file mode 100644 (file)
index 0000000..ce6cda9
--- /dev/null
+++ b/contrib/mingw64cross/mingw-w64.cmake
@@ -0,0 +1,32 @@
+# Sample toolchain file for building for Windows from an Ubuntu Linux system.
+#
+# Typical usage:
+#    *) install cross compiler: `sudo apt-get install mingw-w64`
+#    *) cd build
+#    *) CROSS=x86_64 TOOLCHAIN_ROOT=/opt DEP_ROOT=./mingw64_deps cmake -DCMAKE_TOOLCHAIN_FILE=~/mingw-w64.cmake ..
+
+set(CMAKE_SYSTEM_NAME Windows)
+set(TOOLCHAIN_PREFIX $ENV{CROSS}-w64-mingw32)
+
+# cross compilers to use for C, C++ and Fortran
+set(CMAKE_C_COMPILER ${TOOLCHAIN_PREFIX}-gcc)
+set(CMAKE_CXX_COMPILER ${TOOLCHAIN_PREFIX}-g++)
+set(CMAKE_RC_COMPILER ${TOOLCHAIN_PREFIX}-windres)
+
+# target environment on the build host system
+set(CMAKE_FIND_ROOT_PATH 
+    $ENV{TOOLCHAIN_ROOT}/${TOOLCHAIN_PREFIX}
+    $ENV{DEP_ROOT}/boost/${TOOLCHAIN_PREFIX}
+    $ENV{DEP_ROOT}/db/${TOOLCHAIN_PREFIX}
+    $ENV{DEP_ROOT}/openssl/${TOOLCHAIN_PREFIX}
+    $ENV{DEP_ROOT}/png/${TOOLCHAIN_PREFIX}
+    $ENV{DEP_ROOT}/qt/${TOOLCHAIN_PREFIX}
+)
+
+set(BerkeleyDB_INC $ENV{DEP_ROOT}/db/${TOOLCHAIN_PREFIX}/include)
+set(BerkeleyDB_LIBS $ENV{DEP_ROOT}/db/${TOOLCHAIN_PREFIX}/lib)
+
+# modify default behavior of FIND_XXX() commands
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)