198. Compilation can fail if there is no main program or if a USEd module has not been compiled.#

topic: Compiling

Note

This tip is a draft1.

gfortran m.f90

gives an error

undefined reference to `main’

if m.f90 does not contain a main program.

gfortran -c m.f90

gives an error like

Cannot open module file ‘x.mod’

if the file containing module x has not previously been compiled.

1

From the perspective of FortranTip Browser, “draft” means that it hasn’t been edited for formatting, hasn’t had corresponding Fortran programs added, the text content hasn’t been enhanced, etc. Draft texts are extracted from the corresponding Tweet using the Twitter API.