libgomp/doc/openmp-environment-variables/ompstacksize.rst

   1 ..
   2   Copyright 1988-2022 Free Software Foundation, Inc.
   3   This is part of the GCC manual.
   4   For copying conditions, see the copyright.rst file.
   5
   6 .. index:: Environment Variable
   7
   8 .. _omp_stacksize:
   9
  10 OMP_STACKSIZE -- Set default thread stack size
  11 **********************************************
  12
  13 Description:
  14   Set the default thread stack size in kilobytes, unless the number
  15   is suffixed by ``B``, ``K``, ``M`` or ``G``, in which
  16   case the size is, respectively, in bytes, kilobytes, megabytes
  17   or gigabytes.  This is different from ``pthread_attr_setstacksize``
  18   which gets the number of bytes as an argument.  If the stack size cannot
  19   be set due to system constraints, an error is reported and the initial
  20   stack size is left unchanged.  If undefined, the stack size is system
  21   dependent.
  22
  23 Reference:
  24   :openmp:`4.5`, Section 4.7