#pragma hdrstop
Go Up to Pragma Directives Overview Index
Syntax (See Pseudo-grammar)
#pragma hdrstop
Description
This directive terminates the list of header files eligible for precompilation. You can use it to reduce the amount of disk space used by precompiled headers.
Precompiled header files can be shared between the source files of your project only if the #include
directives before #pragma hdrstop
are identical. Therefore, you get the best compiler performance if you include common header files of your project before the #pragma hdrstop
, and specific ones after it. Make sure the #include
directives before the #pragma hdrstop
are identical in all the source files, or that there are only very few variations.
The integrated development environment generates code to enhance precompiled header performance. For example, after a New Application, source file "Unit1.cpp" will look like this (comments added):
#include <vcl.h> // common header file #pragma hdrstop // terminate list here
Use this pragma directive only in source files. The pragma has no effect when it is used in a header file.