X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Ftermios_h.m4;h=2b799efb49fbbd15fe40cbf002d7dccee765ecca;hb=208e667b5f8c696e723da34171fbaa6f01246f3b;hp=762151a29aa6a11880110b77abde77ddd30e93f7;hpb=6dcf524e1f4e344cc0256b3b7efb53babc452a62;p=gnulib.git

diff --git a/m4/termios_h.m4 b/m4/termios_h.m4
index 762151a29..2b799efb4 100644
--- a/m4/termios_h.m4
+++ b/m4/termios_h.m4
@@ -1,5 +1,5 @@
-# termios_h.m4 serial 1
-dnl Copyright (C) 2010 Free Software Foundation, Inc.
+# termios_h.m4 serial 3
+dnl Copyright (C) 2010-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -11,6 +11,15 @@ AC_DEFUN([gl_TERMIOS_H],
   AC_REQUIRE([gl_TERMIOS_H_DEFAULTS])
 
   gl_CHECK_NEXT_HEADERS([termios.h])
+  if test $ac_cv_header_termios_h != yes; then
+    HAVE_TERMIOS_H=0
+  fi
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use, and which is not
+  dnl guaranteed by C89.
+  gl_WARN_ON_USE_PREPARE([[#include <termios.h>]],
+    [tcgetsid])
 ])
 
 AC_DEFUN([gl_TERMIOS_MODULE_INDICATOR],
@@ -24,4 +33,8 @@ AC_DEFUN([gl_TERMIOS_MODULE_INDICATOR],
 
 AC_DEFUN([gl_TERMIOS_H_DEFAULTS],
 [
+  GNULIB_TCGETSID=0;      AC_SUBST([GNULIB_TCGETSID])
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_DECL_TCGETSID=1;   AC_SUBST([HAVE_DECL_TCGETSID])
+  HAVE_TERMIOS_H=1;       AC_SUBST([HAVE_TERMIOS_H])
 ])