Should the value of pi change...
The following is very probably illegal code.
Still, it would be nice if this could segfault
instead of silently doing the Wrong Thing.
$ cat variation-constants.f90
module a1
contains
subroutine foo(b)
real :: b
b = 42.
end subroutine foo
end module a1
program main
use a1
real, parameter :: pi = 3.1415926535
call foo(pi)
print *,'pi equals ', pi
end program main
$ gfortran variation-constants.f90 && ./a.out
pi equals 42.00000
$ gfortran -v
Reading specs from /home/zfkts/lib/gcc/ia64-unknown-linux-gnu/4.0.0/specs
Configured with: ../gcc-4.0-20041107/configure --prefix=/home/zfkts
--enable-languages=c,c++,f95
Thread model: posix
gcc version 4.0.0 20041107 (experimental)
--
Summary: Can vary constants
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P2
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: Thomas dot Koenig at online dot de
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18566
