llvm-gcc-4.0/gcc/testsuite/gfortran.dg/f2c_2.f90

! Some basic testing that calls to the library still work correctly with
! -ff2c
!
! Once the library has support for f2c calling conventions (i.e. passing
! a REAL*4 or COMPLEX-valued intrinsic as procedure argument works), we
! can simply add -ff2c to the list of options to cycle through, and get
! complete coverage.  As of 2005-03-05 this doesn't work.
! { dg-do run }
! { dg-options "-ff2c" }

complex c
double complex d

x = 2.
if ((sqrt(x) - 1.41)**2 > 1.e-4) call abort ()
x = 1.
if ((atan(x) - 3.14/4) ** 2 > 1.e-4) call abort ()
c = (-1.,0.)
if (sqrt(c) /= (0., 1.)) call abort ()
d = c
if (sqrt(d) /= (0._8, 1._8)) call abort ()
end