dnl CF_WAIT_HEADERS version: 3 updated: 2021/01/02 09:31:20
dnl ---------------
dnl Build up an expression $cf_wait_headers with the header files needed to
dnl compile against the prototypes for 'wait()', 'waitpid()', etc.  Assume it's
dnl Posix, which uses <sys/types.h> and <sys/wait.h>, but allow SVr4 variation
dnl with <wait.h>.
AC_DEFUN([CF_WAIT_HEADERS],
[
AC_HAVE_HEADERS(sys/wait.h)
cf_wait_headers="#include <sys/types.h>
"
if test "$ac_cv_header_sys_wait_h" = yes; then
cf_wait_headers="$cf_wait_headers
#include <sys/wait.h>
"
else
AC_HAVE_HEADERS(wait.h)
AC_HAVE_HEADERS(waitstatus.h)
if test "$ac_cv_header_wait_h" = yes; then
cf_wait_headers="$cf_wait_headers
#include <wait.h>
"
fi
if test "$ac_cv_header_waitstatus_h" = yes; then
cf_wait_headers="$cf_wait_headers
#include <waitstatus.h>
"
fi
fi
])dnl
