https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91287
--- Comment #6 from Thomas Koenig <tkoenig at gcc dot gnu.org> --- (In reply to Xiong Hu XS Luo from comment #4) > /tmp/cctrpu2h.ltrans0.ltrans.o: In function `MAIN__': > <artificial>:(.text+0x114): undefined reference to `_gfortran_st_write' > <artificial>:(.text+0x12c): undefined reference to > `_gfortran_transfer_character_write' You're not linkging against libgfortran. Either use gfortran as command for compiling or linking, or add the appropriate libraries (-lgfortran -lquadmath) to the linking step.
