June 2017
Intermediate to advanced
478 pages
13h 14m
English
Content preview from Mastering Embedded Linux Programming - Second Edition
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Compiling a program with threads
The support for POSIX threads is part of the C-library in the libpthread.so library. However, there is more to building programs with threads than linking the library: there have to be changes to the way the compiler generates code to make sure that certain global variables, such as errno, have one instance per thread rather than one for the whole process.
When building a threaded program, you must add the -pthread switch in the compile and link stages.
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