The C header files are named differently in C++

genmod/rheinstetten_elastic.cpp

src/CPML_coeff.cpp

src/calc_res.cpp

src/catseis.cpp

src/check_recfile.cpp

src/check_recpos.cpp

src/check_srpos.cpp

src/check_srpos.hpp

src/checkfd_ssg.cpp

src/exchange_buffer.cpp

src/fd.hpp

src/freemem_seis.cpp

src/ifos3d.cpp

src/interpol.cpp

src/logging.cpp

src/logging.hpp

src/macros.hpp

src/merge.cpp

src/mergemod.cpp

src/output_source_signal.cpp