windres may be used to manipulate Windows resources.
windresis not always built as part of the binary utilities, since it is only useful for Windows targets.
windres [options] [input-file] [output-file]
windres reads resources from an input file and copies them into
an output file. Either file may be in one of three formats:
A text format read by the Resource Compiler.
A binary format generated by the Resource Compiler.
A COFF object or executable.
The exact description of these different formats is available in documentation from Microsoft.
windres converts from the
rc format to the
format, it is acting like the Windows Resource Compiler. When
windres converts from the
res format to the
format, it is acting like the Windows
windres generates an
rc file, the output is similar
but not identical to the format expected for the input. When an input
rc file refers to an external filename, an output
will instead include the file contents.
If the input or output format is not specified,
guess based on the file name, or, for the input file, the file contents.
A file with an extension of .rc will be treated as an
file, a file with an extension of .res will be treated as a
res file, and a file with an extension of .o or
.exe will be treated as a
If no output file is specified,
windres will print the resources
rc format to standard output.
The normal use is for you to write an
rc file, use
to convert it to a COFF object file, and then link the COFF file into
your application. This will make the resources described in the
rc file available to Windows.
The name of the input file. If this option is not used, then
windres will use the first non-option argument as the input file
name. If there are no non-option arguments, then
read from standard input.
windres can not read a COFF file from
The name of the output file. If this option is not used, then
windres will use the first non-option argument, after any used
for the input file name, as the output file name. If there is no
non-option argument, then
windres will write to standard output.
windres can not write a COFF file to standard output. Note,
for compatibility with
rc the option -fo is also
accepted, but its use is not recommended.
The input format to read. format may be ‘res’, ‘rc’, or
‘coff’. If no input format is specified,
guess, as described above.
The output format to generate. format may be ‘res’,
‘rc’, or ‘coff’. If no output format is specified,
windres will guess, as described above.
Specify the BFD format to use for a COFF file as input or output. This
is a BFD target name; you can use the --help option to see a list
of supported targets. Normally
windres will use the default
format, which is the first one listed by the --help option.
windres reads an
rc file, it runs it through the C
preprocessor first. This option may be used to specify the preprocessor
to use, including any leading arguments. The default preprocessor
gcc -E -xc-header -DRC_INVOKED.
windres reads an
rc file, it runs it through
the C preprocessor first. This option may be used to specify additional
text to be passed to preprocessor on its command line.
This option can be used multiple times to add multiple options to the
preprocessor command line.
Specify an include directory to use when reading an
windres will pass this to the preprocessor as an -I
windres will also search this directory when looking for
files named in the
rc file. If the argument passed to this command
matches any of the supported formats (as described in the -J
option), it will issue a deprecation warning, and behave just like the
-J option. New programs should not use this behaviour. If a
directory happens to match a format, simple prefix it with ‘./’
to disable the backward compatibility.
Specify a -D option to pass to the preprocessor when reading an
Specify a -U option to pass to the preprocessor when reading an
Ignored for compatibility with rc.
Enable verbose mode. This tells you what the preprocessor is if you didn’t specify one.
Specify the default codepage to use when reading an
val should be a hexadecimal prefixed by ‘0x’ or decimal
codepage code. The valid range is from zero up to 0xffff, but the
validity of the codepage is host and configuration dependent.
Specify the default language to use when reading an
val should be a hexadecimal language code. The low eight bits are
the language, and the high eight bits are the sublanguage.
Use a temporary file to instead of using popen to read the output of the preprocessor. Use this option if the popen implementation is buggy on the host (eg., certain non-English language versions of Windows 95 and Windows 98 are known to have buggy popen where the output will instead go the console).
Use popen, not a temporary file, to read the output of the preprocessor. This is the default behaviour.
Prints a usage summary.
Prints the version number for
windres is compiled with
YYDEBUG defined as
this will turn on parser debugging.