https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62049
Bug ID: 62049
Summary: Negative count_rate when calling system_clock
Product: gcc
Version: 4.10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: wxcvbn789456123-nw6wda at yahoo dot fr
Negative count_rate when calling system_clock
Dear Sirs,
I found that a call to system_clock can return a negative count_rate with
gfortran.
This problem does not occur with ifort.
Operating system = Microsoft Windows XP SP3
gfortran : downloaded from :
http://users.humboldt.edu/finneyb/gfortran-windows-20140629.exe
Example under a Cygwin session :
bash 2 : uname -smo
CYGWIN_NT-5.1 i686 Cygwin
bash 3 : gfortran --version
GNU Fortran (GCC) 4.10.0 20140629 (experimental) [trunk revision 212119]
Copyright (C) 2014 Free Software Foundation, Inc.
bash 4 : cat clock.f90
PROGRAM clock
IMPLICIT NONE
INTEGER :: crate
CALL system_clock (count_rate = crate)
WRITE(*,6000) crate
6000 FORMAT(1X,"count_rate = ",I0)
END PROGRAM clock
bash 5 : gfortran clock.f90 -o g.exe
bash 6 : ./g.exe
count_rate = -1128267296
bash 7 : ifort /nologo clock.f90 /exe:i.exe
bash 8 : ./i.exe
count_rate = 10000
Can this behavior be considered as a bug?
Greetings
Paul
