# cmake/modules/CheckHEADER_SYS_WAIT.cmake

#

# Copyright (C) 2006  Alan W. Irwin

#

# This file is part of PLplot.

#

# PLplot is free software; you can redistribute it and/or modify

# it under the terms of the GNU Library General Public License as published

# by the Free Software Foundation; version 2 of the License.

#

# PLplot 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 Library General Public License for more details.

#

# You should have received a copy of the GNU Library General Public License

# along with the file PLplot; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA

#

# - Check for sys/wait.h that is POSIX.1 compatible following autotools

#   AC_HEADER_SYS_WAIT

include(CheckCSourceCompiles)

set(_CHECK_HEADER_SYS_WAIT_SOURCE_CODE "

#include <sys/types.h>

#include <sys/wait.h>

#ifndef WEXITSTATUS

# define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)

#endif

#ifndef WIFEXITED

# define WIFEXITED(stat_val) (((stat_val) & 255) == 0)

#endif

int

main ()

{

  int s;

  wait (&s);

  s = WIFEXITED (s) ? WEXITSTATUS (s) : 1;

  ;

  return 0;

}

")

check_c_source_compiles(

"${_CHECK_HEADER_SYS_WAIT_SOURCE_CODE}"

HAVE_SYS_WAIT_H)