Checks for Libraries and Header Files
The decision of whether or not to use an external library in a project is a tough one. On one hand, you want to reuse existing code to provide required functionality instead of writing it yourself. Reuse is one of the hallmarks of the open source software world. On the other hand, you don't want to depend on functionality that may not exist on all target platforms or that may require significant porting in order to make the libraries you need available where you need them.
Occasionally, library-based functionality can differ in minor ways between platforms. Although the functionality may be essentially equivalent, the libraries may have different package names or different API signatures. The POSIX threads ...
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