.autoconf — Autoconf Configuration File
GNU Project · 1990s
Autoconf files (`.ac`) are plain text scripts used by developers to automatically configure software builds for different operating systems.
Key Features
- Platform-independent build system generation
- Automatic detection of system features and libraries
- Generates portable shell scripts for configuration
- Supports complex dependency checking
Best For
- Developers building cross-platform software
- Distributing software that needs to compile on diverse Unix-like systems
- Automating the tedious task of system feature checking
- Creating reproducible build environments
Less Ideal For
- End-user configuration of installed applications
- Defining application settings or preferences
- Storing application data or user-generated content
- Writing general-purpose programming code
Common Use Cases
- Configuring the build process for open-source software
- Ensuring software compatibility across different Unix-like operating systems
- Automating the detection of required development tools and libraries
- Generating Makefiles suitable for specific environments
How to Open It
- Open with any plain text editor (e.g., VS Code, Sublime Text, Notepad++).
- Use a code editor with syntax highlighting for Autoconf/M4 macros for better readability.
- Developers typically interact with the generated `configure` script, not the `.ac` file directly, during the build process.
What is a .autoconf file?
An Autoconf configuration file, typically named 'configure.ac', is used by the GNU Autoconf package to automatically generate shell scripts. These scripts are designed to adapt software source code to various Unix-like systems. They check for the presence of necessary libraries, header files, and other system-specific features, ensuring that the software can be compiled and run correctly on different platforms. Autoconf makes the build process more portable and user-friendly by abstracting away system complexities.
Programs That Open .autoconf Files
| Platform | Program | ||
|---|---|---|---|
| Windows | Notepad++ | Free | |
| Visual Studio Code | Free | ||
| macOS | TextEdit | Free | Official |
| Visual Studio Code | Free | ||
| Linux | Gedit | Free | Official |
| Vim | Free | ||
| Emacs | Free | ||
| Web Browser | GitHub Codespaces | Paid | |
| Gitpod | Paid |
Common Problems with .autoconf Files
Frequently Asked Questions
Its main purpose is to generate a portable `configure` script that can automatically adapt software source code for compilation on various Unix-like operating systems by checking system features and dependencies.
No, end-users do not typically edit `.autoconf` files. These files are used by developers during the software development and packaging process. End-users usually interact with the generated `configure` script.
The `.ac` file (e.g., `configure.ac`) is the source file containing Autoconf macros. The `autoconf` command processes this `.ac` file to generate the executable `configure` shell script.
Technical Details
Autoconf configuration files are written in a macro language that is processed by the `autoconf` command. This command generates a `configure` shell script. The `configure` script is then executed on the target system to perform checks and generate `Makefile.in` files, which are subsequently processed by `automake` to create `Makefile` files for compilation.