fix: maximize system stacksize limit in fms_init (#1233)

fms/Makefile.am

@@ -32,6 +32,7 @@ noinst_LTLIBRARIES = libfms.la
 # Each convenience library depends on its source.
 libfms_la_SOURCES = \
   fms.F90 \
+  fms_stacksize.c \
   include/fms.inc \
   include/fms_r4.fh \
   include/fms_r8.fh \

fms/fms.F90

@@ -336,6 +336,11 @@ subroutine fms_init (localcomm, alt_input_nml_path)
  use fms_io_mod,    only: fms_io_version
 #endif
 
+ interface
+    subroutine maximize_system_stacksize_limit() bind(C)
+    end subroutine
+ end interface
+
  integer, intent(in), optional :: localcomm
  character(len=*), intent(in), optional :: alt_input_nml_path
  integer :: ierr, io
@@ -344,6 +349,10 @@ subroutine fms_init (localcomm, alt_input_nml_path)
 
     if (module_is_initialized) return    ! return silently if already called
     module_is_initialized = .true.
+
+!---- Raise the system stack size limit to its maximum permissible value ----
+    call maximize_system_stacksize_limit
+
 !---- initialize mpp routines ----
     if(present(localcomm)) then
        if(present(alt_input_nml_path)) then

fms/fms_stacksize.c

@@ -0,0 +1,33 @@
+/***********************************************************************
+ *                   GNU Lesser General Public License
+ *
+ * This file is part of the GFDL Flexible Modeling System (FMS).
+ *
+ * FMS is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * FMS is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FMS.  If not, see <http://www.gnu.org/licenses/>.
+ **********************************************************************/
+
+#include <sys/resource.h>
+
+/*
+ * Set the stack size limit to its maximum permissible value
+ */
+
+void maximize_system_stacksize_limit()
+{
+  struct rlimit stacksize;
+
+  getrlimit(RLIMIT_STACK, &stacksize);
+  stacksize.rlim_cur = stacksize.rlim_max;
+  setrlimit(RLIMIT_STACK, &stacksize);
+}