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autoheader command in Linux with Examples

Last Updated : 01 Oct, 2024

autoheader command in Linux is used to create a template file of C “#define” or any other template header for configure to use. If the user will give autoheader an argument, it reads the standard input instead of reading configure.ac and also writes the header file to the standard output. This command scans the configure.ac file and figures out which C preprocessor symbols it might have defined.

autoheader [OPTION]... [TEMPLATE-FILE]

where,

• TEMPLATE-FILE: Specify the input file if you want autoheader to read a file other than "configure.ac". If no file is provided, autoheader will default to reading the "configure.ac" file.

Here are the most commonly used options with the autoheader command:

Display the help message and then exits.

autoheader -h or autoheader --help

Shows the version number of autoheader and exits.

autoheader -V or autoheader --version

Provides a detailed (verbose) report of the processing done by autoheader.

autoheader -v filename or autoheader --verbose filename

Ensures that temporary files created during the execution of autoheader are not deleted, allowing you to debug the process.

autoheader -d filename or autoheader --debug filename

Forces autoheader to treat all files as outdated, effectively regenerating them.

autoheader -f or autoheader --force

Reports warnings related to specific categories. You can specify a category of warnings for autoheader to report. This is useful for ensuring that your configuration script is robust and free of potential issues.

autoheader -w category or autoheader --warnings category

The other warning categories are:

The autoheader command is a vital part of the Autoconf toolchain, automating the creation of template header files for configuration scripts. This reduces manual work and helps ensure that your software can be configured and compiled across different environments.

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