The correct way for a Makefile to signal that the port cannot be installed due to some external factor for instance, the user has specified an illegal combination of build options is to set a non-blank value to IGNORE. This value will be formatted and shown to the user by make install. It is a common mistake to use. The problem with this is that many automated tools that work with the ports tree will fail in this situation. However, even more trivial commands such as make maintainer also fail in this scenario.
This is not acceptable. The first of the next two Makefile snippets will cause make index to fail, while the second one will not:. The usage of sysctl is discouraged except in targets.
This is because the evaluation of any makevar s, such as used during make index , then has to run the command, further slowing down that process. Only use sysctl 8 through SYSCTL , as it contains the fully qualified path and can be overridden, if one has such a special need. Verify that the changes are official and have been performed by the author. It has happened in the past that the distfile was silently altered on the download servers with the intent to cause harm or compromise end user security.
Put the old distfile aside, download the new one, unpack them and compare the content with diff 1. If there is nothing suspicious, update distinfo. Be sure to summarize the differences in the PR and commit log, so that other people know that nothing bad has happened.
Some software and build systems make assumptions based on a particular operating system or environment that can cause problems when used in a port. For example, setprogname argv[0] in main and then getprogname 3 to know the executable name.
Do not record timestamps in the critical path of the application if it also works without. Getting timestamps may be slow, depending on the accuracy of timestamps in the OS. If timestamps are really needed, determine how precise they have to be and use an API which is documented to just deliver the needed precision.
Do not rely on them being cheap in performance-critical applications. In general, try hard to avoid syscalls if possible. If relying on non-standard behavior is required, encapsulate it properly into a generic API, do a check for the behavior in the configure stage, and stop if it is missing.
Always double-check pkg-descr and pkg-plist. If reviewing a port and a better wording can be achieved, do so. Table of Contents. Writing Something After bsd. Use the exec Statement in Wrapper Scripts If the port installs a shell script whose purpose is to launch another program, and if launching that program is the last action performed by the script, make sure to launch the program using the exec statement, for instance:.
Do Things Rationally The Makefile should do things in a simple and reasonable manner. Verbose Build Logs Make the port build system display all commands executed during the build stage. CC source1. Feedback Do send applicable changes and patches to the upstream maintainer for inclusion in the next release of the code.
Architectural Considerations General Notes on Architectures FreeBSD runs on many more processor architectures than just the well-known xbased ones. Avoid Use of the. FreeBSD is used by millions of users all over the world, as well as some of the busiest sites on the Internet such as Yahoo, Sony Japan, etc. Users attest to the reliability of FreeBSD, its amazing stability, and high performance are due to the following:.
By: Justin Stoltzfus Contributor, Reviewer. By: Satish Balakrishnan. Dictionary Dictionary Term of the Day. Machine Intelligence. Techopedia Terms. The kernel, device drivers, and all of the userland utilities, such as the shell, are held in the same source code revision tracking tree.. Third-party application software may be installed using various software installation systems, the two most common being source installation and package installation, both of which use the FreeBSD Ports system.
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Forgot your password? Retrieve it. If by any chance you spot an inappropriate image within your search results please use this form to let us know, and we'll take care of it shortly. Term » Definition. Word in Definition. Freebase 0. How to pronounce FreeBSD? Alex US English. David US English. Mark US English. Daniel British. Libby British.
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