Writing autoconf macros

Traditionally, daemons are implemented following a scheme originating in SysV Unix. Modern daemons should follow a simpler yet more powerful scheme here called "new-style" daemonsas implemented by systemd 1. This manual page covers both schemes, and in particular includes recommendations for daemons that shall be included in the systemd init system. Note that these steps are unnecessary for new-style daemons see belowand should only be implemented if compatibility with SysV is essential.

Writing autoconf macros

Choosing a good programming languagePrevious: Writing Good ProgramsUp: Writing Good Programs 2. If you are doing this because someone asked you to solve the problem, then all you need to do to look good in per eyes is to deliver a program that works.

Nevertheless, regardless of how little person writing autoconf macros appreciate this, doing just that is not good enough. Once you have code that gives the right answer to a specific set of problems, you will want to make improvements to it.

Also, tomorrow you will want to move on to a different set of related problems by repeating as little work as possible. Finally, one day you may want to pass the project on to someone else or recruit another developer to help you out with certain parts.

You need to make it possible for the other person to get up to speed without reinventing your efforts. To accomplish these equally important goals you need to write good code.

2 Macro Names

Developing librariesPrevious: Why good code is importantUp: To make your software free, it should be possible to compile it with free tools on a free operating system. Therefore, you should avoid using programming languages that do not have a free compiler.

Nevertheless, C has weaknesses: Also C forces you to program at a low level. Sometimes it is desirable to program at a low level, but there are also cases where you want to build on a higher level. As a result, it has been used to solve a variety of real-world problems and its specification has evolved for many years to make it a powerful and mature language that can tackle such problems effectively.

The problem is that different compilers do these kludges differently, making object files across compilers incompatible. This is not a terrible problem, since object files are incompatible across different platforms anyways.

It is only a problem when you want to use more than one compiler on the same platform. However these disadvantages must be weighted against the advantages.Next: Reporting Messages, Previous: Macro Definitions, Up: Writing Autoconf Macros Macro Names All of the public Autoconf macros have all-uppercase names in the namespace ‘ ^AC_ ’ to prevent them from accidentally conflicting with other text; Autoconf also reserves the namespace ‘ ^_AC_ ’ for internal macros.

writing autoconf macros

And that where autoconf comes to play its role. I recently submit a new version of AX_CHECK_GL, that can address these complicated portability issues. Check out the three OpenGL checking macros: AX_CHECK_GL, AX_CHECK_GLU, and AX_CHECK_GLUT on autoconf archive. The syntax is very easy.

How to check Linux version with Autoconf? Ask Question. I have an general idea how to write this macro but I don't have enough knowledge about writing test macros for Autoconf. Algorithm: Without going too deep and write autoconf macros properly (which would be preferable anyway) don't forget that plombier-nemours.com is basically a shell.

CMake is a cross-platform, open-source build system. CMake is part of a family of tools designed to build, test and package software. CMake is used to control the software compilation process using simple platform and compiler independent configuration files.

CMake generates native makefiles and workspaces that can be used in the compiler environment of your choice. GNU Autoconf, Automake, and Libtool [Gary V. Vaughn, Ben Elliston, Tom Tromey, Ian Lance Taylor] on plombier-nemours.com *FREE* shipping on qualifying offers.

If you are a developer and are looking to participate in the Open Source development growth area you will need to learn new Open Source tools. GNU autoconf. The Autoconf macros are defined in several files. Some of the files are distributed with Autoconf; autoconf reads them first.

Then it looks for the optional file `acsite.m4' in the directory that contains the distributed Autoconf macro files, and for the optional file `aclocal.m4' in the current directory.

writing autoconf macros
How to check Linux version with Autoconf? - Stack Overflow