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The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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─────C/C++ Compiler─────────────────────────────────────────────────────────
 
     With the /Yc, /Yd, /Yu, and /Fp options and the hdrstop pragma,
     Microsoft C/C++ provides the ability to precompile code.
     Precompilation, especially when used in conjunction with the fast
     compile (/f) option, can dramatically reduce compile time for code
     that is frequently compiled without modification.
 
     You can precompile a stable body of code, which can be header
     files and all or part of source files--including inline code.
     Precompilation will work with both C and C++.
 
     This process saves the state of a compilation (including CodeView
     information) in a file with a .PCH extension called a precompiled
     header file. In later compilations, the compiler simply restores
     the saved compilation state from a precompiled header file, which
     saves you the time required to recompile the code.
 
     NOTE: The following compiler options are not supported when
           creating or using precompiled headers:
 
           Option     Compiler Action
 
           /E         Preserve #line Directives
           /EP        Remove #line Directives
           /P         Create Preprocessed File
           /Zg        Generate Function Prototypes
 
     See also: ◄Create a Precompiled Header►
               ◄Include Debugging Information►
               ◄Use Precompiled Header►
               ◄Specify Precompiled Header Filename►
               ◄hdrstop pragma►
               ◄Using Precompiled Headers in PWB►
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