The GNU Fortran Compiler: _gfortran_caf_co_min

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#### 7.2.34 `_gfortran_caf_co_min` — Collective minimum reduction

Description:

  Calculates for each array element of the variable a the minimum value for that element in the current team; if result_image has the value 0, the result shall be stored on all images, otherwise, only on the specified image. This function operates on numeric values and character strings.

Syntax:

  `void _gfortran_caf_co_min (gfc_descriptor_t *a, int result_image, int *stat, char *errmsg, int a_len, size_t errmsg_len)`

Arguments:

  a | intent(inout) An array descriptor for the data to be processed. On the destination image(s) the result overwrites the old content.
  result_image | intent(in) The ID of the image to which the reduced value should be copied to; if zero, it has to be copied to all images.
  stat | intent(out) Stores the status STAT= and may be NULL.
  errmsg | intent(out) When an error occurs, this will be set to an error message; may be NULL.
  a_len | intent(in) the string length of argument a
  errmsg_len | intent(in) the buffer size of errmsg

NOTES

  If result_image is nonzero, the data in the array descriptor a on all images except of the specified one become undefined; hence, the library may make use of this.