CMake: Build third-party deps in Windows

- Update recipes to build with MSVC or cross compile in Unix with Mingw
- For recipes that need to be reused, wrap recipe in CMake function
  using cmake_parse_arguments
- New directory .deps/host is the install root for HOST targets, the old
  .deps/usr is used for TARGET
- In windows disable builds for terminal libraries and jemalloc
- Added cmake script CopyFilesGlob.cmake to copy files using glob
    cmake -DFROM_GLOB=*.h -DTO=/usr/include -P CopyFilesGlob.cmake
- New CMake variables HOSTDEPS_* can be used in cross compile recipes.
  Except when the target is UNIX, since that would break 32bit builds
  in 64bit Unix systems using the Travis 32bit toolchain

third-party/cmake/BuildMsgpack.cmake

@@ -1,22 +1,74 @@
+include(CMakeParseArguments)
+
+# BuildMsgpack(CONFIGURE_COMMAND ... BUILD_COMMAND ... INSTALL_COMMAND ...)
+# Reusable function to build msgpack, wraps ExternalProject_Add.
+# Failing to pass a command argument will result in no command being run
+function(BuildMsgpack)
+  cmake_parse_arguments(_msgpack
+    ""
+    ""
+    "CONFIGURE_COMMAND;BUILD_COMMAND;INSTALL_COMMAND"
+    ${ARGN})
+
+  if(NOT _msgpack_CONFIGURE_COMMAND AND NOT _msgpack_BUILD_COMMAND
+       AND NOT _msgpack_INSTALL_COMMAND)
+    message(FATAL_ERROR "Must pass at least one of CONFIGURE_COMMAND, BUILD_COMMAND, INSTALL_COMMAND")
+  endif()
+
+  ExternalProject_Add(msgpack
+    PREFIX ${DEPS_BUILD_DIR}
+    URL ${MSGPACK_URL}
+    DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/msgpack
+    DOWNLOAD_COMMAND ${CMAKE_COMMAND}
+      -DPREFIX=${DEPS_BUILD_DIR}
+      -DDOWNLOAD_DIR=${DEPS_DOWNLOAD_DIR}/msgpack
+      -DURL=${MSGPACK_URL}
+      -DEXPECTED_SHA256=${MSGPACK_SHA256}
+      -DTARGET=msgpack
+      -P ${CMAKE_CURRENT_SOURCE_DIR}/cmake/DownloadAndExtractFile.cmake
+    CONFIGURE_COMMAND "${_msgpack_CONFIGURE_COMMAND}"
+    BUILD_COMMAND "${_msgpack_BUILD_COMMAND}"
+    INSTALL_COMMAND "${_msgpack_INSTALL_COMMAND}")
+endfunction()
+
+set(MSGPACK_CONFIGURE_COMMAND ${CMAKE_COMMAND} ${DEPS_BUILD_DIR}/src/msgpack
+  -DMSGPACK_ENABLE_CXX=OFF
+  -DMSGPACK_BUILD_TESTS=OFF
+  -DCMAKE_INSTALL_PREFIX=${DEPS_INSTALL_DIR}
+  -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
+  "-DCMAKE_C_FLAGS:STRING=${CMAKE_C_COMPILER_ARG1} -fPIC")
+
+set(MSGPACK_BUILD_COMMAND ${CMAKE_COMMAND} --build .)
+set(MSGPACK_INSTALL_COMMAND ${CMAKE_COMMAND} --build . --target install)
+
+if(MINGW AND CMAKE_CROSSCOMPILING)
+  get_filename_component(TOOLCHAIN ${CMAKE_TOOLCHAIN_FILE} REALPATH)
+  set(MSGPACK_CONFIGURE_COMMAND ${CMAKE_COMMAND} ${DEPS_BUILD_DIR}/src/msgpack
+    -DMSGPACK_ENABLE_CXX=OFF
+    -DMSGPACK_BUILD_TESTS=OFF
+    -DCMAKE_INSTALL_PREFIX=${DEPS_INSTALL_DIR}
+    # Pass toolchain
+    -DCMAKE_TOOLCHAIN_FILE=${TOOLCHAIN}
+    # Hack to avoid -rdynamic in Mingw
+    -DCMAKE_SHARED_LIBRARY_LINK_C_FLAGS="")
+elseif(MSVC)
+  # Same as UNIX without fPIC
+  set(MSGPACK_CONFIGURE_COMMAND ${CMAKE_COMMAND} ${DEPS_BUILD_DIR}/src/msgpack
+    -DMSGPACK_ENABLE_CXX=OFF
+    -DMSGPACK_BUILD_TESTS=OFF
+    -DCMAKE_INSTALL_PREFIX=${DEPS_INSTALL_DIR}
+    -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
+    "-DCMAKE_C_FLAGS:STRING=${CMAKE_C_COMPILER_ARG1}"
+    # Make sure we use the same generator, otherwise we may
+    # accidentaly end up using different MSVC runtimes
+    -DCMAKE_GENERATOR=${CMAKE_GENERATOR}
+    # Use static runtime
+    -DCMAKE_C_FLAGS_DEBUG="-MTd"
+    -DCMAKE_C_FLAGS_RELEASE="-MT")
+endif()
+
+BuildMsgpack(CONFIGURE_COMMAND ${MSGPACK_CONFIGURE_COMMAND}
+  BUILD_COMMAND ${MSGPACK_BUILD_COMMAND}
+  INSTALL_COMMAND ${MSGPACK_INSTALL_COMMAND})
 
-ExternalProject_Add(msgpack
-  PREFIX ${DEPS_BUILD_DIR}
-  URL ${MSGPACK_URL}
-  DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/msgpack
-  DOWNLOAD_COMMAND ${CMAKE_COMMAND}
-    -DPREFIX=${DEPS_BUILD_DIR}
-    -DDOWNLOAD_DIR=${DEPS_DOWNLOAD_DIR}/msgpack
-    -DURL=${MSGPACK_URL}
-    -DEXPECTED_SHA256=${MSGPACK_SHA256}
-    -DTARGET=msgpack
-    -P ${CMAKE_CURRENT_SOURCE_DIR}/cmake/DownloadAndExtractFile.cmake
-  CONFIGURE_COMMAND cmake ${DEPS_BUILD_DIR}/src/msgpack
-     -DMSGPACK_ENABLE_CXX=OFF
-     -DMSGPACK_BUILD_TESTS=OFF
-     -DCMAKE_INSTALL_PREFIX=${DEPS_INSTALL_DIR}
-     -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
-     "-DCMAKE_C_FLAGS:STRING=${CMAKE_C_COMPILER_ARG1} -fPIC"
-  BUILD_COMMAND ${CMAKE_COMMAND} --build .
-  INSTALL_COMMAND ${CMAKE_COMMAND} --build . --target install)
 list(APPEND THIRD_PARTY_DEPS msgpack)
-