cowwoc writes:

When I compile my code against Boost 1.36 I get:

3>C:\Program Files\boost_1_36_0\boost/config/abi_prefix.hpp(19) : warning C4103: 'c:\program files\boost_1_36_0\boost\config\abi_prefix.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop)

[snipped similar warnings]

I don't recall seeing this in 1.35 and I compiled against it two days ago. I am compiling under Visual Studio 2008, in x64 mode. How do I fix these warnings?

Disable the warning in the Visual Studio project settings. These warnings are because the thread library now saves and restores the alignment settings using the boost abi_prefix.hpp and abi_suffix.hpp headers (whereas it didn't in 1.35). Because the necessary pragmas are in separate headers (push in abi_prefix, pop in abi_suffix) the compiler is warning about it. This is necessary because otherwise code compiled with non-standard alignment may have subtle bugs due to the alignment changing (and thus structure layout changing) between the compiled thread library and the included headers. Anthony -- Anthony Williams | Just Software Solutions Ltd Custom Software Development | http://www.justsoftwaresolutions.co.uk Registered in England, Company Number 5478976. Registered Office: 15 Carrallack Mews, St Just, Cornwall, TR19 7UL

Try to include directly boost/thread.hpp, I get the same warning when I use boost/mutex.hpp alone for example. Maybe you can still keep the warning enabled with this "trick". Regards, Isaac Lascasas. -------------------------------------------------- From: "cowwoc" Sent: Friday, August 15, 2008 8:32 AM To: Subject: [Boost-users] New compiler warnings triggered by Boost 1.36

When I compile my code against Boost 1.36 I get:

3>C:\Program Files\boost_1_36_0\boost/config/abi_prefix.hpp(19) : warning C4103: 'c:\program files\boost_1_36_0\boost\config\abi_prefix.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) 3>C:\Program Files\boost_1_36_0\boost/thread/exceptions.hpp(22) : warning C4103: 'c:\program files\boost_1_36_0\boost\thread\exceptions.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) 3>C:\Program Files\boost_1_36_0\boost/config/abi_suffix.hpp(20) : warning C4103: 'c:\program files\boost_1_36_0\boost\config\abi_suffix.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) 3>C:\Program Files\boost_1_36_0\boost/thread/exceptions.hpp(108) : warning C4103: 'c:\program files\boost_1_36_0\boost\thread\exceptions.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) 3>C:\Program Files\boost_1_36_0\boost/config/abi_prefix.hpp(19) : warning C4103: 'c:\program files\boost_1_36_0\boost\config\abi_prefix.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) 3>c:\program files\boost_1_36_0\boost\thread\win32\thread_primitives.hpp(151) : warning C4103: 'c:\program files\boost_1_36_0\boost\thread\win32\thread_primitives.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) 3>C:\Program Files\boost_1_36_0\boost/config/abi_suffix.hpp(20) : warning C4103: 'c:\program files\boost_1_36_0\boost\config\abi_suffix.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) 3>c:\program files\boost_1_36_0\boost\thread\win32\thread_primitives.hpp(396) : warning C4103: 'c:\program files\boost_1_36_0\boost\thread\win32\thread_primitives.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) 3>C:\Program Files\boost_1_36_0\boost/config/abi_prefix.hpp(19) : warning C4103: 'c:\program files\boost_1_36_0\boost\config\abi_prefix.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) 3>c:\program files\boost_1_36_0\boost\thread\win32\interlocked_read.hpp(14) : warning C4103: 'c:\program files\boost_1_36_0\boost\thread\win32\interlocked_read.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) 3>C:\Program Files\boost_1_36_0\boost/config/abi_suffix.hpp(20) : warning C4103: 'c:\program files\boost_1_36_0\boost\config\abi_suffix.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) 3>c:\program files\boost_1_36_0\boost\thread\win32\interlocked_read.hpp(78) : warning C4103: 'c:\program files\boost_1_36_0\boost\thread\win32\interlocked_read.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop)

I don't recall seeing this in 1.35 and I compiled against it two days ago. I am compiling under Visual Studio 2008, in x64 mode. How do I fix these warnings?

Thank you, Gili -- View this message in context: http://www.nabble.com/New-compiler-warnings-triggered-by-Boost-1.36-tp189944... Sent from the Boost - Users mailing list archive at Nabble.com.

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