If we recompile a file that outputs the same .mod files, they shouldn't get
updated: it makes dependency analysis useless and probably makes parallel
compiling (make -jN) less efficient.
$ cat a.f90
module foo
integer, parameter :: bar = 42
end module foo
$ gfortran -c a.f90
$ stat foo.mod | grep Modify
Modify: 2007-04-16 11:15:54.000000000 +0200
$ gfortran -c a.f90
$ stat foo.mod | grep Modify
Modify: 2007-04-16 11:15:58.000000000 +0200
--
Summary: Module files shouldn't be updated if their content
doesn't change
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Severity: trivial
Priority: P3
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: fxcoudert at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31587
