>> 如何查看一个DLL是不是64bit
在迁移过程中，需要编译X64的QT。因为编译64bit的方法与32bit一样，不同的就是在调用vcvasall.bat的参数。
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call "C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\vcvarsall.bat" amd64
subst s: /d
subst s: f:/SolidMCP
cd /d S:\Components\CPlusPlus\QT\QT_4.7.3_Win64
configure -fast -opensource -declarative -confirm-license -platform win32-msvc2008
nmake
md temp
move lib\*.pdb temp
nmake clean
move temp\*.pdb lib
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因为编译的结果取决于一个小小的参数，自然有些心里发毛，自然Build结束之后有必要查看一把，到底是不是build了64bit。
Visual Studio自带的dumpbin可以干这个事情，而且还能dump出PE image中的Segments 的一些信息：
C:\Program Files (x86)\Microsoft Visual Studio 9.0\vc\bin>dumpbin /headers F:\SolidMCP\Components\CPlusPlus\QT\QT_4.6.2_Win64\bin\QtGui4.dll >c:\dump.txt
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Microsoft (R) COFF/PE Dumper Version 9.00.30729.01
Copyright (C) Microsoft Corporation. All rights reserved.
Dump of file F:\SolidMCP\Components\CPlusPlus\QT\QT_4.6.2_Win64\bin\QtGui4.dll
PE signature found
File Type: DLL
FILE HEADER VALUES
8664 machine (x64)
6 number of sections
4E4BD9D6 time date stamp Wed Aug 17 23:10:14 2011
0 file pointer to symbol table
0 number of symbols
F0 size of optional header
2022 characteristics
Executable
Application can handle large (>2GB) addresses
DLL
OPTIONAL HEADER VALUES
20B magic # (PE32+)
9.00 linker version
64EE00 size of code
.... [200 words are skipped]
SECTION HEADER #1
.text name
64EC61 virtual size
1000 virtual address (0000000065001000 to 000000006564FC60)
64EE00 size of raw data
.... [200 words are skipped]
SECTION HEADER #2
.rdata name
2FB104 virtual size
650000 virtual address (0000000065650000 to 000000006594B103)
2FB200 size of raw data
.... [200 words are skipped]
SECTION HEADER #3
.data name
FBD0 virtual size
94C000 virtual address (000000006594C000 to 000000006595BBCF)
.... [200 words are skipped]
SECTION HEADER #4
.pdata name
7A154 virtual size
95C000 virtual address (000000006595C000 to 00000000659D6153)
.... [200 words are skipped]
SECTION HEADER #5
.rsrc name
5C4 virtual size
9D7000 virtual address (00000000659D7000 to 00000000659D75C3)
.... [200 words are skipped]
SECTION HEADER #6
.reloc name
10C66 virtual size
9D8000 virtual address (00000000659D8000 to 00000000659E8C65)
.... [200 words are skipped]
Summary
10000 .data
7B000 .pdata
2FC000 .rdata
11000 .reloc
1000 .rsrc
64F000 .text
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