ltlfilt: use error() to report errors.

* lib/error.c, lib/error.h, lib/msvc-inval.c, lib/msvc-inval.h,
lib/msvc-nothrow.c, lib/msvc-nothrow.h, m4/error.m4, m4/msvc-inval.m4,
m4/msvc-nothrow.m4: New files from gnulib
1af55d85d9762a679b4302d5995f05ccd883e956.
* lib/Makefile.am, m4/gnulib-cache.m4, m4/gnulib-comp.m4: Adjust.
* src/bin/ltlfilt.cc: Use error() and error_at_line().

m4/error.m4

@@ -0,0 +1,28 @@
+#serial 14
+
+# Copyright (C) 1996-1998, 2001-2004, 2009-2012 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_ERROR],
+[
+  dnl We don't use AC_FUNC_ERROR_AT_LINE any more, because it is no longer
+  dnl maintained in Autoconf and because it invokes AC_LIBOBJ.
+  AC_CACHE_CHECK([for error_at_line], [ac_cv_lib_error_at_line],
+    [AC_LINK_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <error.h>]],
+          [[error_at_line (0, 0, "", 0, "an error occurred");]])],
+       [ac_cv_lib_error_at_line=yes],
+       [ac_cv_lib_error_at_line=no])])
+])
+
+# Prerequisites of lib/error.c.
+AC_DEFUN([gl_PREREQ_ERROR],
+[
+  AC_REQUIRE([AC_FUNC_STRERROR_R])
+  AC_REQUIRE([AC_C_INLINE])
+  :
+])

m4/gnulib-cache.m4

@@ -27,12 +27,13 @@
 
 
 # Specification in the form of a command-line invocation:
-#   gnulib-tool --import --dir=. --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=tools --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files argp progname
+#   gnulib-tool --import --dir=. --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=tools --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files argp error progname
 
 # Specification in the form of a few gnulib-tool.m4 macro invocations:
 gl_LOCAL_DIR([])
 gl_MODULES([
   argp
+  error
   progname
 ])
 gl_AVOID([])

m4/gnulib-comp.m4

@@ -45,6 +45,7 @@ AC_DEFUN([gl_EARLY],
   # Code from module dosname:
   # Code from module double-slash-root:
   # Code from module errno:
+  # Code from module error:
   # Code from module extensions:
   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
   # Code from module float:
@@ -57,6 +58,8 @@ AC_DEFUN([gl_EARLY],
   # Code from module malloc-posix:
   # Code from module memchr:
   # Code from module mempcpy:
+  # Code from module msvc-inval:
+  # Code from module msvc-nothrow:
   # Code from module multiarch:
   # Code from module nocrash:
   # Code from module progname:
@@ -116,6 +119,14 @@ AC_DEFUN([gl_INIT],
   gl_DIRNAME_LGPL
   gl_DOUBLE_SLASH_ROOT
   gl_HEADER_ERRNO_H
+  gl_ERROR
+  if test $ac_cv_lib_error_at_line = no; then
+    AC_LIBOBJ([error])
+    gl_PREREQ_ERROR
+  fi
+  m4_ifdef([AM_XGETTEXT_OPTION],
+    [AM_][XGETTEXT_OPTION([--flag=error:3:c-format])
+     AM_][XGETTEXT_OPTION([--flag=error_at_line:5:c-format])])
   gl_FLOAT_H
   if test $REPLACE_FLOAT_LDBL = 1; then
     AC_LIBOBJ([float])
@@ -166,6 +177,14 @@ AC_DEFUN([gl_INIT],
     gl_PREREQ_MEMPCPY
   fi
   gl_STRING_MODULE_INDICATOR([mempcpy])
+  gl_MSVC_INVAL
+  if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
+    AC_LIBOBJ([msvc-inval])
+  fi
+  gl_MSVC_NOTHROW
+  if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
+    AC_LIBOBJ([msvc-nothrow])
+  fi
   gl_MULTIARCH
   AC_CHECK_DECLS([program_invocation_name], [], [], [#include <errno.h>])
   AC_CHECK_DECLS([program_invocation_short_name], [], [], [#include <errno.h>])
@@ -402,6 +421,8 @@ AC_DEFUN([gl_FILE_LIST], [
   lib/dirname.h
   lib/dosname.h
   lib/errno.in.h
+  lib/error.c
+  lib/error.h
   lib/float+.h
   lib/float.c
   lib/float.in.h
@@ -416,6 +437,10 @@ AC_DEFUN([gl_FILE_LIST], [
   lib/memchr.c
   lib/memchr.valgrind
   lib/mempcpy.c
+  lib/msvc-inval.c
+  lib/msvc-inval.h
+  lib/msvc-nothrow.c
+  lib/msvc-nothrow.h
   lib/printf-args.c
   lib/printf-args.h
   lib/printf-parse.c
@@ -459,6 +484,7 @@ AC_DEFUN([gl_FILE_LIST], [
   m4/dirname.m4
   m4/double-slash-root.m4
   m4/errno_h.m4
+  m4/error.m4
   m4/exponentd.m4
   m4/extensions.m4
   m4/float_h.m4
@@ -473,6 +499,8 @@ AC_DEFUN([gl_FILE_LIST], [
   m4/memchr.m4
   m4/mempcpy.m4
   m4/mmap-anon.m4
+  m4/msvc-inval.m4
+  m4/msvc-nothrow.m4
   m4/multiarch.m4
   m4/nocrash.m4
   m4/off_t.m4

m4/msvc-inval.m4

@@ -0,0 +1,19 @@
+# msvc-inval.m4 serial 1
+dnl Copyright (C) 2011-2012 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.
+
+AC_DEFUN([gl_MSVC_INVAL],
+[
+  AC_CHECK_FUNCS_ONCE([_set_invalid_parameter_handler])
+  if test $ac_cv_func__set_invalid_parameter_handler = yes; then
+    HAVE_MSVC_INVALID_PARAMETER_HANDLER=1
+    AC_DEFINE([HAVE_MSVC_INVALID_PARAMETER_HANDLER], [1],
+      [Define to 1 on MSVC platforms that have the "invalid parameter handler"
+       concept.])
+  else
+    HAVE_MSVC_INVALID_PARAMETER_HANDLER=0
+  fi
+  AC_SUBST([HAVE_MSVC_INVALID_PARAMETER_HANDLER])
+])

m4/msvc-nothrow.m4

@@ -0,0 +1,10 @@
+# msvc-nothrow.m4 serial 1
+dnl Copyright (C) 2011-2012 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.
+
+AC_DEFUN([gl_MSVC_NOTHROW],
+[
+  AC_REQUIRE([gl_MSVC_INVAL])
+])