strtod: Restore errno when successfully parsing Infinity or NaN.

[gnulib.git] / m4 / tcgetsid.m4

diff --git a/m4/tcgetsid.m4 b/m4/tcgetsid.m4
index 11dcc3d..f8ab91e 100644 (file)
--- a/m4/tcgetsid.m4
+++ b/m4/tcgetsid.m4
@@ -1,5 +1,5 @@
-# tcgetsid.m4 serial 1
-dnl Copyright (C) 2010 Free Software Foundation, Inc.
+# tcgetsid.m4 serial 2
+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.
@@ -11,9 +11,13 @@ AC_DEFUN([gl_FUNC_TCGETSID],
   dnl Persuade glibc <termios.h> to declare tcgetsid().
   AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
 
+  AC_CHECK_DECLS_ONCE([tcgetsid])
+  if test $ac_cv_have_decl_tcgetsid = no; then
+    HAVE_DECL_TCGETSID=0
+  fi
+
   AC_CHECK_FUNCS([tcgetsid])
   if test $ac_cv_func_tcgetsid = no; then
-    HAVE_TCGETSID=0
     AC_LIBOBJ([tcgetsid])
     gl_PREREQ_TCGETSID
   fi