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turn off compiler led padding

Posted on 2013-12-20
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Last Modified: 2014-01-08
Hi

if the compiler is adding padding to get the struct members aligned properly at a certain byte boundary, how can i turn this off? My IDE is Visual Studio and I am using C++.

thanks
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Question by:LuckyLucks
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jkr earned 2000 total points
ID: 39732152
Open your Project Settings (either right-click on your project in the tree view and select 'Properties...' or press 'ALT+F7'). Then go to "Configuration Properties|C/C++|Code Generation" and set 'Struct Member Alignment' to the desired value. To turn that off, select '1 byte'.

BTW, the command line equivalent is '/Zp[n] pack structs on n-byte boundary', see http://msdn.microsoft.com/en-us/library/windows/desktop/aa367388%28v=vs.85%29.aspx ("/Zp switch"). You could also use

#pragma pack(1)

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in your code, seemore at http://msdn.microsoft.com/en-us/library/vstudio/2e70t5y1%28v=vs.100%29.aspx ("pack")
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