Visible to Intel only — GUID: GUID-0098A263-E185-41DD-9FD1-F5A318AA96D2
Visible to Intel only — GUID: GUID-0098A263-E185-41DD-9FD1-F5A318AA96D2
Yu
Tells the compiler to use a precompiled header file.
Syntax
Linux: |
None |
macOS: |
None |
Windows: |
/Yu[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 use precompiled header files unless it is told to do so. |
Description
This option tells the compiler to use a precompiled header (PCH) file.
It is supported for multiple source files when all source files use the same .pchi file.
The compiler treats all code occurring before the header file as precompiled. It skips to just beyond the #include directive associated with the header file, uses the code contained in the PCH file, and then compiles all code after filename.
If you do not specify filename, the compiler will use a PCH with a name based on the source file name. If you specify option /Fp, it will use the PCH specified by that option.
When this option is specified, the compiler ignores all text, including declarations preceding the #include statement of the specified file.
This option cannot be used in the same compilation as the /Yc option.
On Linux* and macOS systems, option /Yu is equivalent to the -pch-use option.
IDE Equivalent
Visual Studio: Precompiled Headers > Precompiled Header
Eclipse: None
Xcode: None
Alternate Options
Linux and macOS: -pch-use
Windows: None
Example
Consider the following command line:
icl /c /Yuheader.h bar.cpp
In this case, the name of the PCH file used is "header.pchi".
In the following command line, no filename is specified:
icl /Yu bar.cpp
In this case, the name of the PCH file used is "bar.pchi".
In the following command line, no filename is specified, but option /Fp is specified:
icl /Yu /Fpprecomp bar.cpp
In this case, the name of the PCH file used is "precomp.pchi".