blocks|key|172065|text|是的，您可以使用dumpbin的/DIRECTIVES选项来查找.lib中的对象想要链接的运行时库：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|172066|dumpbin+/directives+foo.lib|code-block|syntax|javascript|172067|查找指定的运行库here的实例。例如，您可能会看到：|172068|/DEFAULTLIB:MSVCRTD+(用/MDd编译的模块)|172069|或|172070|/DEFAULTLIB:MSVCRT+(用/MD编译的模块)|172071|172072|/DEFAULTLIB:LIBCMT+(用/MT编译的模块)|172073|可能会有许多/DEFAULTLIB指令，因此您可以使用以下术语进行搜索：|172074|dumpbin+/DIRECTIVES+foo.lib+%7C+find+/i+"msvcr"|172075|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/abx4dbyh.aspx^0|G|B|0|0|8|4|0|0|0|J|0|0|0|I|0|0|0|I|0|6|B|0|0^^$0|@$1|2|3|4|5|6|7|17|8|@$9|18|A|19|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|1A|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1B|8|@]|D|@$9|1C|A|1D|1|1E]]|E|$]]|$1|M|3|N|5|6|7|1F|8|@$9|1G|A|1H|B|C]]|D|@]|E|$]]|$1|O|3|P|5|6|7|1I|8|@]|D|@]|E|$]]|$1|Q|3|R|5|6|7|1J|8|@$9|1K|A|1L|B|C]]|D|@]|E|$]]|$1|S|3|P|5|6|7|1M|8|@]|D|@]|E|$]]|$1|T|3|U|5|6|7|1N|8|@$9|1O|A|1P|B|C]]|D|@]|E|$]]|$1|V|3|W|5|6|7|1Q|8|@$9|1R|A|1S|B|C]]|D|@]|E|$]]|$1|X|3|Y|5|H|7|1T|8|@]|D|@]|E|$I|J]]|$1|Z|3|-4|5|6|7|1U|8|@]|D|@]|E|$]]]|10|$11|$5|12|13|14|E|$15|16]]]]

Yes, you could use dumpbin's <code>/DIRECTIVES</code> option to find which runtime libraries the objects in the .lib want to link with:
<pre><code>dumpbin /directives foo.lib
</code></pre>
Look for instances of the runtime libraries specified <a href="http://msdn.microsoft.com/en-us/library/abx4dbyh.aspx" rel="nofollow noreferrer">here</a>. For example, you might see:
<code>/DEFAULTLIB:MSVCRTD</code> (module compiled with /MDd)
or
<code>/DEFAULTLIB:MSVCRT</code> (module compiled with /MD)
or
<code>/DEFAULTLIB:LIBCMT</code> (module compiled with /MT)
There will probably be many <code>/DEFAULTLIB</code> directives, so you can search using terms like:
<pre><code>dumpbin /DIRECTIVES foo.lib | find /i &quot;msvcr&quot;
</code></pre>

blocks|key|174525|text|微软编译器的一个非常好的特性是，它保留了用于将源文件编译成.obj文件的命令行。它允许你通过查看.lib文件来找到它，等待它，Notepad.exe。只需搜索"cl.exe“即可。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|174526|例如，当我使用记事本在我用VS2013构建的名为Win32Project1.lib的示例库上打开时，我看到了以下内容：|174527|174528|+C:\Program+Files+(x86)\Microsoft+Visual+studio+12.0\VC\bin\CL.exe+cmd+-c+-ZI+-nologo+-W3+-WX-+-sdl+-Od+-Oy-+-DWIN32+-D_DEBUG+-D_LIB+-DHELLO_STACKOVERFLOW+-D_UNICODE+-DUNICODE+-Gm+-EHs+-EHc+-RTC1“Studio+2013\Projects\Win32Project1\Debug\Win32Project1.pch“-Fo"c:\Users\hpass_000\documents\visual+Studio+2013\Projects\Win32Project1\Debug\”-Fd"c:\Users\hpass_000\documents\visual+studio+2013\Projects\Win32Project1\Debug\vc120.pdb“-Gd+-TP+-analyze-+-errorreport:prompt+-I"C:\Program+Files+(x86)\Microsoft+Visual+Studio+12.0\VC\include”-I"C:\Program+Files+(x86)\Microsoft+Visual+studio+12.0\VC\atlmfc\包括“-I"C:\Program+Files+(x86)\Windows+\8.1\Include\um”-I"C:\Program+Files+(x86)\Windows+\8.1\Include\shared“-I"C:\Program+Files+(x86)\Windows+\8.1\Include\winrt”-X+src+stdafx.cpp+pdb+c:\Users\hpass_000\documents\visual+studio+2013\Projects\Win32Project1\Debug\vc120.pdb|blockquote|174529|174530|174531|如您所见，我使用/MDd进行编译|174532|一定要注意，.lib可以包含多个可能具有不同设置的.obj文件。搜索"-mt“和"-md”可以让你很快找到答案。|174533|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|R|8|@]|9|@]|A|$]]|$1|E|3|F|5|G|7|S|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|T|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|U|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|V|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|W|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|O|$]]

A very nice feature of the Microsoft compiler is that it preserves the command line that was used to compile a source file into the .obj file. Which allows you to find it back by looking at the .lib file with, wait for it, Notepad.exe. Just search for "cl.exe".

For example, this is what I see when I use Notepad opened on a sample library named Win32Project1.lib that I built with VS2013:

<blockquote>
 C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\bin\CL.exe cmd -c -ZI -nologo -W3 -WX- -sdl -Od -Oy- -DWIN32 -D_DEBUG -D_LIB -DHELLO_STACKOVERFLOW -D_UNICODE -DUNICODE -Gm -EHs -EHc -RTC1 -MDd -GS -fp:precise -Zc:wchar_t -Zc:forScope -Ycstdafx.h -Fp"c:\Users\hpass_000\documents\visual studio 2013\Projects\Win32Project1\Debug\Win32Project1.pch" -Fo"c:\Users\hpass_000\documents\visual studio 2013\Projects\Win32Project1\Debug\" -Fd"c:\Users\hpass_000\documents\visual studio 2013\Projects\Win32Project1\Debug\vc120.pdb" -Gd -TP -analyze- -errorreport:prompt -I"C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include" -I"C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\atlmfc\include" -I"C:\Program Files (x86)\Windows Kits\8.1\Include\um" -I"C:\Program Files (x86)\Windows Kits\8.1\Include\shared" -I"C:\Program Files (x86)\Windows Kits\8.1\Include\winrt" -X src stdafx.cpp pdb c:\Users\hpass_000\documents\visual studio 2013\Projects\Win32Project1\Debug\vc120.pdb
</blockquote>

As you can tell, I compiled with /MDd

Do beware that a .lib can contain multiple .obj files with possibly different settings. Searching for "-mt" and "-md" lets you find out quickly.

Given a compiled <code>lib</code>, is there a way to tell if it was compiled with <code>/md</code> or <code>/mt</code> just by looking at it (maybe with <code>dumpbin</code> tool)?

Edit:
<code>dumpbin /directives foo.lib</code> is a solution for the case where the <code>lib</code> was not compiled with <code>/GL</code> switch. Is there an option to inspect a <code>lib</code> file that was optimized in such a way?

How to tell if a lib was compiled with /mt or /md?

给定一个编译过的lib，有没有一种方法可以仅仅通过观察它(可能是用dumpbin工具)来判断它是用/md还是/mt编译的？编辑： dumpbin /directives foo.lib是针对lib不是使用/GL开关编译的情况的解决方案。有没有一个选项可以检查以这种方式优化的lib文件？

问如何判断一个库是用/mt还是/md编译的？
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问如何判断一个库是用/mt还是/md编译的？
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