gcc/testsuite/gfortran.dg/f2c_4.f90

   1 ! { dg-do run }
   2 ! { dg-additional-sources f2c_4.c }
   3 ! { dg-options "-ff2c -w" }
   4
   5 ! Check -ff2c calling conventions
   6 !   Return value of REAL function is promoted to C type double
   7 !   Return value of COMPLEX function is via an extra argument in the
   8 !    calling sequence that points to where to store the return value
   9 !   Addional underscore appended to function name
  10 program f2c_4
  11   complex c, f2c_4k, f2c_4l
  12   double complex z, f2c_4m, f2c_4n
  13   integer i
  14
  15   ! Promotion of REAL function
  16   call f2c_4a()
  17
  18   ! Return COMPLEX arg - call Fortran routines from C
  19   call f2c_4c()
  20   call f2c_4e()
  21   call f2c_4g()
  22   call f2c_4i()
  23
  24   !  Return COMPLEX arg - call C routines from Fortran
  25   c = cmplx(1234.0,5678.0)
  26   z = dcmplx(1234.0d0,5678.0d0)
  27   if ( c .ne. f2c_4k(c) )   STOP 1
  28   if ( c .ne. f2c_4l(i,c) ) STOP 2
  29   if ( z .ne. f2c_4m(z) )   STOP 3
  30   if ( z .ne. f2c_4n(i,z) ) STOP 4
  31
  32 end
  33
  34 real function f2c_4b(x)
  35   double precision x
  36   f2c_4b = x
  37 end
  38
  39 complex function f2c_4d(x)
  40   complex x
  41   f2c_4d = x
  42 end
  43
  44 complex function f2c_4f(i,x)
  45   complex x
  46   integer i
  47   f2c_4f = x
  48 end
  49
  50 double complex function f2c_4h(x)
  51   double complex x
  52   f2c_4h = x
  53 end
  54
  55 double complex function f2c_4j(i,x)
  56   double complex x
  57   f2c_4j = x
  58 end