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Building from source with option -Dbuiltin_cfitsio fails with this error:
[ 86%] Building CXX object gui/gui/CMakeFiles/G__Gui.dir/G__Gui.cxx.o
[ 86%] Built target G__FITSIO
[ 86%] Built target SpectrumPainter
gmake[2]: *** No rule to make target ‘CFITSIO-prefix/lib/libcfitsio.a’, needed by ‘lib/libFITSIO.so’. Stop.
gmake[2]: *** Waiting for unfinished jobs…
The file does exist but not in that location …find . -name libcfitsio.a
./CFITSIO-prefix/src/BUILTIN_CFITSIO-build/libcfitsio.a
./CFITSIO-prefix/lib64/libcfitsio.a