+
+AC_DEFUN([gl_WINSIZE_IN_PTEM],
+ [AC_REQUIRE([AC_SYS_POSIX_TERMIOS])
+ AC_CACHE_CHECK([whether use of struct winsize requires sys/ptem.h],
+ gl_cv_sys_struct_winsize_needs_sys_ptem_h,
+ [gl_cv_sys_struct_winsize_needs_sys_ptem_h=yes
+ if test $ac_cv_sys_posix_termios = yes; then
+ AC_TRY_COMPILE([#include <termios.h>],
+ [struct winsize x;
+ if (sizeof x > 0) return 0;],
+ [gl_cv_sys_struct_winsize_needs_sys_ptem_h=no])
+ fi
+ if test $gl_cv_sys_struct_winsize_needs_sys_ptem_h = yes; then
+ AC_TRY_COMPILE([#include <sys/ptem.h>],
+ [struct winsize x;
+ if (sizeof x > 0) return 0;],
+ [], [gl_cv_sys_struct_winsize_needs_sys_ptem_h=no])
+ fi])
+ if test $gl_cv_sys_struct_winsize_needs_sys_ptem_h = yes; then
+ AC_DEFINE([WINSIZE_IN_PTEM], [1],
+ [Define if sys/ptem.h is required for struct winsize.])
+ fi])