meson: define DEBUG if debug

meson.build

@@ -28,7 +28,9 @@ pre_args = [
 ]
 
 # Always set max spdlog level, handle this using MANGOHUD_LOG_LEVEL instead.
-pre_args += '-DDEBUG'
+if get_option('buildtype') == 'debug'
+  pre_args += '-DDEBUG'
+endif
 pre_args += '-DSPDLOG_ACTIVE_LEVEL=SPDLOG_LEVEL_TRACE'
 
 # TODO: this is very incomplete

src/overlay.cpp

@@ -72,7 +72,7 @@ void init_spdlog()
          SPDLOG_ERROR("{}", ex.what());
       }
    }
-#ifndef NDEBUG
+#ifdef DEBUG
    spdlog::set_level(spdlog::level::level_enum::debug);
 #endif
    spdlog::cfg::load_env_levels();
@@ -88,10 +88,12 @@ void init_spdlog()
             spdlog::set_level(spdlog::level::from_str(log_level));
          }
       }
+#ifndef DEBUG
    } else {
       std::string log_level = "err";
       transform(log_level.begin(), log_level.end(), log_level.begin(), ::tolower);
       spdlog::set_level(spdlog::level::from_str(log_level));
+#endif
    }
 
 }