Setting environment for using Microsoft Visual Studio 2008 x86 tools.

C:\Program Files\Microsoft Visual Studio 9.0\VC>cd \temp

C:\temp>copy con test.cpp
#pragma pack(push, 3)

struct X
{
  char a;
  bool b;
  int i;
};

#pragma pack (pop)

int main()
{

return 0;
}

^Z
Скопировано файлов:         1.

C:\temp>cl test.cpp
Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 15.00.30729.01 for 80x86
Copyright (C) Microsoft Corporation.  All rights reserved.

test.cpp
test.cpp(1) : warning C4086: expected pragma parameter to be '1', '2', '4', '8',
 or '16'
test.cpp(5) : fatal error C1001: An internal error has occurred in the compiler.

(compiler file 'msc1.cpp', line 1411)
 To work around this problem, try simplifying or changing the program near the l
ocations listed above.
Please choose the Technical Support command on the Visual C++
 Help menu, or open the Technical Support help file for more information
Internal Compiler Error in C:\Program Files\Microsoft Visual Studio 9.0\VC\BIN\c
l.exe.  You will be prompted to send an error report to Microsoft later.

C:\temp>

_>#pragma pack(push, 3)
_>

#pragma pack(push,3) // только в таком виде
struct X { int a; }; // нужна хоть какая-нибудь структура - предмет для вываливания в ICE.

#pragma pack(push,1)
#pragma pack(3)
...
#pragma pack(pop)