Visual Studio 201x warning: Cannot find or open the PDB file

visual studio 2010 正常运行后在output window 跳出一堆warnings:

'Shaders.exe': Loaded 'C:Documents and SettingsUserMy DocumentsVisual Studio        2010ProjectsShadersWin32DebugShaders.exe', Symbols loaded.
'Shaders.exe': Loaded 'C:WINDOWSsystem32
tdll.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:WINDOWSsystem32kernel32.dll', Cannot find or open the PDB  file
'Shaders.exe': Loaded 'C:qt-everywhere-opensource-src-4.8.3inQtCored4.dll', Symbols  loaded.
'Shaders.exe': Loaded 'C:WINDOWSsystem32user32.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:WINDOWSsystem32gdi32.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:WINDOWSsystem32ole32.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:WINDOWSsystem32advapi32.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:WINDOWSsystem32
pcrt4.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:WINDOWSsystem32secur32.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:WINDOWSsystem32msvcrt.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:WINDOWSsystem32ws2_32.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:WINDOWSsystem32ws2help.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:WINDOWSsystem32msvcp100d.dll', Symbols loaded.
'Shaders.exe': Loaded 'C:WINDOWSsystem32msvcr100d.dll', Symbols loaded.
'Shaders.exe': Loaded 'C:qt-everywhere-opensource-src-4.8.3inQtGuid4.dll', Symbols loaded.
'Shaders.exe': Loaded 'C:WINDOWSsystem32comdlg32.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:WINDOWSsystem32comctl32.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:WINDOWSsystem32shell32.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:WINDOWSsystem32shlwapi.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:WINDOWSsystem32oleaut32.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:WINDOWSsystem32imm32.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:WINDOWSsystem32winmm.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:WINDOWSsystem32winspool.drv', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:qt-everywhere-opensource-src-4.8.3inQtOpenGLd4.dll', Symbols loaded.

虽然可以在编译选项里面加入 _CRT_SECURE_NO_WARNINGS, 但是出现这种warning，还是想处理一下。

PDB是visual studio用于debug的信息文件, 属于系统的dll, 因此解决方法有以下几种：

(1) 关闭debug模块加载错误提示，方法是依次打开 Tools -> Options -> Debugging -> Output Window -> Module Load Messages -> Off 

(2) 下载PDB文件，依次打开 Tools->Options->Debugging->Symbols 在 "Microsoft Symbol Servers" 的复选框上打勾

推荐使用第一种方法，每次打开project都要加载一大堆PDB，还是比较难以容忍的.