Add ASan build (#81)

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

cmake/modules/BuildType.cmake

@@ -8,8 +8,21 @@ if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
       "${default_build_type}"
       CACHE STRING "Choose the type of build." FORCE)
   # Set the possible values of build type for cmake-gui
-  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release" "MinSizeRel"
+  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "ASan" "Debug" "Release" "MinSizeRel"
                                                "RelWithDebInfo")
 else()
   message(STATUS "Setting build type to '${CMAKE_BUILD_TYPE}'")
 endif()
+
+# build flags for special ASAN build.
+set(CMAKE_C_FLAGS_ASAN
+    "${CMAKE_C_FLAGS_DEBUG} -fsanitize=address,undefined -fno-omit-frame-pointer")
+
+set(CMAKE_CXX_FLAGS_ASAN
+    "${CMAKE_CXX_FLAGS_DEBUG} -fsanitize=address,undefined -fno-omit-frame-pointer")
+
+set(CMAKE_EXE_LINKER_FLAGS_ASAN
+    "${CMAKE_EXE_LINKER_FLAGS_DEBUG} -fsanitize=address,undefined -static-libasan")
+
+set(CMAKE_SHARED_LINKER_FLAGS_ASAN
+    "${CMAKE_SHARED_LINKER_FLAGS_DEBUG} -fsanitize=address,undefined -static-libasan")