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 Settings\User\My Documents\Visual Studio        2010\Projects\Shaders\Win32\Debug\Shaders.exe', Symbols loaded.
'Shaders.exe': Loaded 'C:\WINDOWS\system32\ntdll.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:\WINDOWS\system32\kernel32.dll', Cannot find or open the PDB  file
'Shaders.exe': Loaded 'C:\qt-everywhere-opensource-src-4.8.3\bin\QtCored4.dll', Symbols  loaded.
'Shaders.exe': Loaded 'C:\WINDOWS\system32\user32.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:\WINDOWS\system32\gdi32.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:\WINDOWS\system32\ole32.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:\WINDOWS\system32\advapi32.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:\WINDOWS\system32\rpcrt4.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:\WINDOWS\system32\secur32.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:\WINDOWS\system32\msvcrt.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:\WINDOWS\system32\ws2_32.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:\WINDOWS\system32\ws2help.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:\WINDOWS\system32\msvcp100d.dll', Symbols loaded.
'Shaders.exe': Loaded 'C:\WINDOWS\system32\msvcr100d.dll', Symbols loaded.
'Shaders.exe': Loaded 'C:\qt-everywhere-opensource-src-4.8.3\bin\QtGuid4.dll', Symbols loaded.
'Shaders.exe': Loaded 'C:\WINDOWS\system32\comdlg32.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:\WINDOWS\system32\comctl32.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:\WINDOWS\system32\shell32.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:\WINDOWS\system32\shlwapi.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:\WINDOWS\system32\oleaut32.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:\WINDOWS\system32\imm32.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:\WINDOWS\system32\winmm.dll', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:\WINDOWS\system32\winspool.drv', Cannot find or open the PDB file
'Shaders.exe': Loaded 'C:\qt-everywhere-opensource-src-4.8.3\bin\QtOpenGLd4.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.