Developer Guide and Reference

Contents

Yc

Tells the compiler to create a precompiled header file.

Syntax

Linux:
None
Windows:
/Yc
[
filename
]
Arguments
filename
Is the name of a C/C++ header file, which is included in the source file using an #include preprocessor directive.
Default
OFF
The compiler does not create or use precompiled headers unless you tell it to do so.
Description
This option tells the compiler to create a precompiled header (PCH) file. It is supported only for single source file compilations.
When
filename
is specified, the compiler creates a precompiled header file from the headers in the C/C++ program up to and including the C/C++ header specified.
If you do not specify
filename
, the compiler compiles all code up to the end of the source file, or to the point in the source file where a hdrstop occurs. The default name for the resulting file is the name of the source file with extension .pchi.
This option cannot be used in the same compilation as the
/Yu
option.
IDE Equivalent
Visual Studio:
Precompiled Headers > Precompiled Header File
Eclipse:
None
Alternate Options
None
Example
If option /Fp is used, it names the PCH file. For example, consider the following command lines:
! specific to C++ icx /c /Ycheader.h /Fpprecomp foo.cpp icx /c /Yc /Fpprecomp foo.cpp
! specific to DPC++ dpcpp /c /Ycheader.h /Fpprecomp foo.cpp dpcpp /c /Yc /Fpprecomp foo.cpp
In both cases, the name of the PCH file is "precomp.pchi".
If the header file name is specified, the file name is based on the header file name. For example:
icx /c /Ycheader.h foo.cpp ! specific to C++
dpcpp /c /Ycheader.h foo.cpp ! specific to DPC++
In this case, the name of the PCH file is "header.pchi".
If no header file name is specified, the file name is based on the source file name. For example:
icx /c /Yc foo.cpp ! specific to C++
dpcpp /c /Yc foo.cpp ! specific to DPC++
In this case, the name of the PCH file is "foo.pchi".

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.