Add Windows CI variant for sanitizer CI jobs

For Windows, add jobs testing the address sanitizer for MSVC, as no
sanitizer is known to work with Clang or Clang-CL.

Author: StableCoder

.gitlab-ci.yml

@@ -623,3 +623,18 @@ macOS/Clang/UndefinedSanitizer:
     CXX: clang++
     CMAKE_OPTIONS: -D EXAMPLE_USE_SANITIZER=undefined
   <<: *macos_success_template
+
+Windows/MSVC/Address Sanitizer:
+  image: stabletec/build-core:windows-2019
+  stage: Sanitizers
+  parallel:
+    matrix:
+      - ARCH: [amd64]
+  tags:
+    - container
+    - windows
+    - ${ARCH}
+  script:
+    - cmake example/all/ -B build -GNinja -D EXAMPLE_USE_SANITIZER=address
+    - ninja -C build
+    - ninja -C build test ; if ($? -ne 0) { return 0 } else { return 1 }

sanitizers.cmake

@@ -87,6 +87,7 @@
 # functional until then, either by defining `USE_SANITIZER` or
 # `SANITIZER_ENABLE_LEGACY_SUPPORT` before including the script file.
 
+include(CheckCXXCompilerFlag)
 include(CheckCXXSourceCompiles)
 
 function(append_quoteless value)
@@ -100,13 +101,23 @@ endfunction()
 function(test_san_flags RETURN_VAR)
   set(QUIET_BACKUP ${CMAKE_REQUIRED_QUIET})
   set(CMAKE_REQUIRED_QUIET TRUE)
-  unset(${return_var} CACHE)
+  unset(${RETURN_VAR} CACHE)
   set(FLAGS_BACKUP ${CMAKE_REQUIRED_FLAGS})
   unset(CMAKE_REQUIRED_FLAGS)
+  unset(test_san_flags_OPTION_TEST CACHE)
   foreach(ARG ${ARGN})
+    if(WIN32)
+      unset(test_san_flags_OPTION_TEST CACHE)
+      check_cxx_compiler_flag(${ARG} test_san_flags_OPTION_TEST)
+      if(NOT test_san_flags_OPTION_TEST)
+        break()
+      endif()
+    endif()
     set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${ARG}")
   endforeach()
-  check_cxx_source_compiles("int main() { return 0; }" ${RETURN_VAR})
+  if(NOT DEFINED test_san_flags_OPTION_TEST OR test_san_flags_OPTION_TEST)
+    check_cxx_source_compiles("int main() { return 0; }" ${RETURN_VAR})
+  endif()
   set(CMAKE_REQUIRED_FLAGS "${FLAGS_BACKUP}")
   set(CMAKE_REQUIRED_QUIET "${QUIET_BACKUP}")
 endfunction()