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GNU hello program is quite complex as well https://www.gnu.org/software/hello/ https://www.gnu.org/software/hello/

• mseepgood 3y ago
  The source code: https://git.savannah.gnu.org/cgit/hello.git/tree/src/hello.c https://git.savannah.gnu.org/cgit/hello.git/tree/src/hello.c