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/FA, /Fa (Listing file)

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Creates a listing file containing assembler code.

Syntax

/FA[c][s][u]
/Fapathname

Remarks

The /FA compiler option generates an assembler listing file for each translation unit in the compilation, which generally corresponds to a C or C++ source file. By default, only assembler is included in the listing file, which is encoded as ANSI. The optional c, s, and u arguments to /FA control whether machine code or source code are output together with the assembler listing, and whether the listing is encoded as UTF-8.

By default, each listing file gets the same base name as the source file, and has an .asm extension. When machine code is included by using the c option, the listing file has a .cod extension. You can change the name and extension of the listing file and the directory where it's created by using the /Fa option.

/FA arguments

none
Only assembler language is included in the listing.

c
Optional. Includes machine code in the listing.

s
Optional. Includes source code in the listing.

u
Optional. Encodes the listing file in UTF-8 format, and includes a byte order marker. By default, the file is encoded as ANSI. Use u to create a listing file that displays correctly on any system, or if you're using Unicode source code files as input to the compiler.

If both s and u are specified, and if a source code file uses a Unicode encoding other than UTF-8, then the code lines in the .asm file may not display correctly.

/Fa argument

none
One source.asm file is created for each source code file in the compilation.

filename
The compiler places a listing file named filename.asm in the current directory. This argument form is only valid when compiling a single source code file.

filename.extension
The compiler places a listing file named filename.extension in the current directory. This argument form is only valid when compiling a single source code file.

directory\
The compiler creates one source_file.asm file for each source code file in the compilation. It's placed in the specified directory. The trailing backslash is required. Only paths on the current disk are allowed.

directory\filename
A listing file named filename.asm is placed in the specified directory. This argument form is only valid when compiling a single source code file.

directory\filename.extension
A listing file named filename.extension is placed in the specified directory. This argument form is only valid when compiling a single source code file.

To set this compiler option in the Visual Studio development environment

  1. Open the project's Property Pages dialog box. For details, see Set C++ compiler and build properties in Visual Studio.

  2. Select the Configuration Properties > C/C++ > Output Files property page.

  3. Modify the Assembler Output property to set the /FAc and /FAs options for assembler, machine, and source code. Modify the Use Unicode For Assembler Listing property to set the /FAu option for ANSI or UTF-8 output. Modify the ASM List Location to set the /Fa option for listing file name and location.

Setting both Assembler Output and Use Unicode For Assembler Listing properties can cause Command-Line Warning D9025. To combine these options in the IDE, use the Additional Options field in the Command Line property page instead.

To set this compiler option programmatically

Example

The following command line produces a combined source and machine-code listing called HELLO.cod:

CL /FAcs HELLO.CPP

See also

Output-File (/F) Options
MSVC Compiler Options
MSVC Compiler Command-Line Syntax
Specifying the Pathname