cmake: Add options for debugging

This adds std library assertions and address sanitizer options.

They are not yet enabled by default for debug builds as they are not
compatible with our inline assembler

CMakeLists.txt

@@ -108,6 +108,14 @@ option( KICAD_SPICE
     "Build KiCad with internal Spice simulator."
     ON )
 
+option( KICAD_SANITIZE
+    "Build KiCad with sanitizer options. WARNING: Not compatible with gold linker"
+    OFF )
+
+option( KICAD_STDLIB_DEBUG
+    "Build KiCad with libstdc++ debug flags enabled."
+    OFF )
+
 option( KICAD_BUILD_PARALLEL_CL_MP
     "Build in parallel using the /MP compiler option (default OFF for safety reasons)"
     OFF )
@@ -321,6 +329,14 @@ if( CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang" )
         set( CMAKE_C_FLAGS_DEBUG   "-g3 -ggdb3 -DDEBUG" )
         set( CMAKE_CXX_FLAGS_DEBUG "-g3 -ggdb3 -DDEBUG -Wno-deprecated-declarations" )
     endif()
+    
+    if( KICAD_SANITIZE )
+        set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_GLIBCXX_SANITIZE_VECTOR -fsanitize=address -fno-optimize-sibling-calls -fsanitize-address-use-after-scope -fno-omit-frame-pointer" )
+    endif()
+
+    if( KICAD_STDLIB_DEBUG )
+        set( CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -D_GLIBCXX_DEBUG" )
+    endif()
 
     if( MINGW )
         set( CMAKE_EXE_LINKER_FLAGS_RELEASE "-s" )