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# serial 1
dnl From Bruno Haible.
dnl Test whether ssize_t is defined.
dnl Prerequisite: AC_CHECK_HEADERS(unistd.h)
AC_DEFUN([gt_TYPE_SSIZE_T],
[
AC_CACHE_CHECK([for ssize_t], gt_cv_ssize_t,
[AC_TRY_COMPILE([
#include <sys/types.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif], [int x = sizeof (ssize_t *) + sizeof (ssize_t);],
gt_cv_ssize_t=yes, gt_cv_ssize_t=no)])
if test $gt_cv_ssize_t = no; then
AC_DEFINE(ssize_t, int,
[Define as a signed type of the same size as size_t.])
fi
])
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