Reduced test case from
http://gcc.gnu.org/ml/fortran/2007-10/msg00412.html
$ cat write.f90
program main
implicit none
integer :: i
open(95,form="unformatted",access="stream")
do i=0,255
write(95) int(i,kind=1)
end do
end program main
$ gfortran write.f90
$ strace -etrace=write ./a.out
write(3, "\0", 1) = 1
write(3, "\1", 1) = 1
write(3, "\2", 1) = 1
write(3, "\3", 1) = 1
write(3, "\4", 1) = 1
write(3, "\5", 1) = 1
write(3, "\6", 1) = 1
write(3, "\7", 1) = 1
write(3, "\10", 1) = 1
write(3, "\t", 1) = 1
write(3, "\n", 1) = 1
write(3, "\v", 1) = 1
write(3, "\f", 1) = 1
write(3, "\r", 1) = 1
write(3, "\16", 1) = 1
write(3, "\17", 1) = 1
write(3, "\20", 1) = 1
write(3, "\21", 1) = 1
write(3, "\22", 1) = 1
write(3, "\23", 1) = 1
write(3, "\24", 1) = 1
write(3, "\25", 1) = 1
write(3, "\26", 1) = 1
write(3, "\27", 1) = 1
write(3, "\30", 1) = 1
write(3, "\31", 1) = 1
write(3, "\32", 1) = 1
write(3, "\33", 1) = 1
write(3, "\34", 1) = 1
... and so on.
--
Summary: access="stream",form="unformatted" doesn't buffer
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libfortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: tkoenig at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33985
