perf: add crosscompiling settings (#43)

Signed-off-by: msclock <msclock@qq.com>

cmake/build/Default.cmake

@@ -1,6 +1,7 @@
 #[[
 Default to build.
 ]]
+include_guard(GLOBAL)
 
 # Create the compile command database for clang by default
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

cmake/configure/Default.cmake

@@ -1,6 +1,7 @@
 #[[
 Default to configuration.
 ]]
+include_guard(GLOBAL)
 
 # Put the include dirs which are in the source or build tree before all other
 # include dirs, so the headers in the sources are preferred over the already

cmake/install/Default.cmake

@@ -1,3 +1,4 @@
 #[[
 Default to installation.
 ]]
+include_guard(GLOBAL)

cmake/install/InstallDependency.cmake

@@ -5,6 +5,12 @@ This module provides tools to handle cmake installations painlessly.
 include_guard(GLOBAL)
 include(${CMAKE_CURRENT_LIST_DIR}/Runpath.cmake)
 
+if(WIN32 AND NOT ${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Windows")
+  # We're building for Windows on a different operating system. Set the platform
+  # for get_runtime_dependencies() to "windows+pe"
+  set(CMAKE_GET_RUNTIME_DEPENDENCIES_PLATFORM "windows+pe")
+endif()
+
 #[[
 A function to enable installation of dependencies as part of the
  `make install` process.

cmake/test/Default.cmake

@@ -1,3 +1,27 @@
 #[[
 Default to test
 ]]
+
+include_guard(GLOBAL)
+
+# This variable is only used when ``CMAKE_CROSSCOMPILING`` is on. It should
+# point to a command on the host system that can run executable built for the
+# target system.
+if(WIN32 AND NOT ${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Windows")
+  # We're building for Windows on a different operating system.
+  find_program(
+    WINE
+    NAMES "wine" "wine64" "wine-development"
+    DOC "Wine (to run tests)")
+
+  if(WINE)
+    message(
+      STATUS "The following Wine binary will be used to run tests: \"${WINE}\"")
+    set(CMAKE_CROSSCOMPILING_EMULATOR ${WINE})
+  else()
+    message(
+      WARNING
+        "You are cross-compiling for Windows but don't have Wine, you will not be able to run tests."
+    )
+  endif()
+endif()