When compiling the code below, gfortran emits warnings about unused
variables which are not defined by the user:
module misc_utils
implicit none
interface toString
module procedure toString_i, toString_sp
end interface
contains
function toString_i (num)
integer, intent(in) :: num
character (len=30) :: toString_i
write(toString_i,*) num
toString_i = trim(adjustl(toString_i))
end function
function toString_sp (num)
real, intent(in) :: num
character (len=30) :: toString_sp
write(toString_sp,*) num
toString_sp = trim(adjustl(toString_sp))
end function
end module misc_utils
~/tmp>gfortran -Wunused -W -v -c misc_utils.f90
Reading specs from /afs/mpa/data/martin/ugcc/lib/gcc/i686-pc-linux-gnu/4.0.0/specs
Configured with: /scratch/gcc/configure --quiet
--prefix=/afs/mpa/data/martin/ugcc --enable-languages=c++,f95
--with-gmp=/afs/mpa/data/martin/mygmp
Thread model: posix
gcc version 4.0.0 20041021 (experimental)
/afs/mpa/data/martin/ugcc/libexec/gcc/i686-pc-linux-gnu/4.0.0/f951
misc_utils.f90 -quiet -dumpbase misc_utils.f90 -mtune=pentiumpro -auxbase
misc_utils -Wunused -W -version -o /tmp/ccSekDLb.s
GNU F95 version 4.0.0 20041021 (experimental) (i686-pc-linux-gnu)
compiled by GNU C version 4.0.0 20041021 (experimental).
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
misc_utils.f90:5: warning: unused parameter '.__result'
misc_utils.f90:5: warning: unused parameter '.__result'
Interestingly, the warnings are issued for line 5, which only contains
the interface description.
--
Summary: [gfortran] spurious warnings with -W -Wall
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: martin at mpa-garching dot mpg dot de
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18111
