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Determining if the function getopt exists passed with the following output:
Change Dir: /var/tmp/portage/sci-chemistry/openbabel-2.4.1-r1/work/openbabel-2.4.1_build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/ninja cmTC_97bfd && [1/2] Building C object CMakeFiles/cmTC_97bfd.dir/CheckFunctionExists.c.o
[2/2] Linking C executable cmTC_97bfd