Hi,
I can't seem to find a good resource that clearly explains what #pragma does. I saw it in this code:
#ifdef _DEBUG
#pragma comment( lib, "MyLib_d" )
#elseif
#pragma comment( lib, "MyLib" )
#endif
Can anyone explain it to me? Thanks.
Hi,
I can't seem to find a good resource that clearly explains what #pragma does. I saw it in this code:
#ifdef _DEBUG
#pragma comment( lib, "MyLib_d" )
#elseif
#pragma comment( lib, "MyLib" )
#endif
Can anyone explain it to me? Thanks.
From MSDN with Visual Studio 6.0 Professional:
Pragma Directives
Each implementation of C and C++ supports some features unique to its host machine or operating system. Some programs, for instance, need to exercise precise control over the memory areas where data is placed or to control the way certain functions receive parameters. The #pragma directives offer a way for each compiler to offer machine- and operating-system-specific features while retaining overall compatibility with the C and C++ languages. Pragmas are machine- or operating-system-specific by definition, and are usually different for every compiler.
Syntax
#pragma token-string
The token-string is a series of characters that gives a specific compiler instruction and arguments, if any. The number sign (#) must be the first non-white-space character on the line containing the pragma; white-space characters can separate the number sign and the word pragma. Following #pragma, write any text that the translator can parse as preprocessing tokens. The argument to #pragma is subject to macro expansion.
If the compiler finds a pragma it does not recognize, it issues a warning, but compilation continues.
Pragmas can be used in conditional statements, to provide new preprocessor functionality, or to provide implementation-defined information to the compiler. The C and C++ compilers recognize the following pragmas:
alloc_text comment init_seg1 optimize
auto_inline component inline_depth pack
bss_seg data_seg inline_recursion pointers_to_members1
check_stack function intrinsic setlocale
code_seg hdrstop message vtordisp1
const_seg include_alias once warning
1. Supported only by the C++ compiler.
While you're breakin' down my back n'
I been rackin' out my brain
It don't matter how we make it
'Cause it always ends the same
You can push it for more mileage
But your flaps r' wearin' thin
And I could sleep on it 'til mornin'
But this nightmare never ends
Don't forget to call my lawyers
With ridiculous demands
An you can take the pity so far
But it's more than I can stand
'Cause this couchtrip's gettin' older
Tell me how long has it been
'Cause 5 years is forever
An you haven't grown up yet
-- You Could Be Mine - Guns N' Roses
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