Re: [PATCH] Make errno.h define EILSEQ on old LynxOS systems.

[Paul Eggert]

Thanks for reporting that.  The patch needs to
modify a few more files to be complete, I think.
Also, I don't think we need to make a special case
for LynxOS -- any system that doesn't define EILSEQ
can benefit from the change.  So, how about the following
patch instead?

>From 28f490315e02177c9747e03e6e86e27987343797 Mon Sep 17 00:00:00 2001
From: Paul Eggert <address@hidden>
Date: Thu, 1 Nov 2012 15:29:14 -0700
Subject: [PATCH] errno: port to LynxOS 178 2.2.2

Problem reported by Joel Brobecker in
<http://lists.gnu.org/archive/html/bug-gnulib/2012-10/msg00088.html>.
* doc/posix-headers/errno.texi (errno.h): Document this.
* lib/errno.in.h (EILSEQ, GNULIB_defined_EILSEQ) [!EILSEQ]: New macros.
* lib/strerror-override.c, lib/strerror-override.h (strerror_override):
Supply a string for EILSEQ.
* m4/errno_h.m4 (gl_HEADER_ERRNO_H): Check for EILSEQ.
---
 ChangeLog                    | 11 +++++++++++
 doc/posix-headers/errno.texi |  3 +++
 lib/errno.in.h               |  5 +++++
 lib/strerror-override.c      |  5 +++++
 lib/strerror-override.h      |  3 ++-
 m4/errno_h.m4                |  5 ++++-
 6 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 720b7a2..c74d311 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+2012-11-01  Paul Eggert  <address@hidden>
+
+       errno: port to LynxOS 178 2.2.2
+       Problem reported by Joel Brobecker in
+       <http://lists.gnu.org/archive/html/bug-gnulib/2012-10/msg00088.html>.
+       * doc/posix-headers/errno.texi (errno.h): Document this.
+       * lib/errno.in.h (EILSEQ, GNULIB_defined_EILSEQ) [!EILSEQ]: New macros.
+       * lib/strerror-override.c, lib/strerror-override.h (strerror_override):
+       Supply a string for EILSEQ.
+       * m4/errno_h.m4 (gl_HEADER_ERRNO_H): Check for EILSEQ.
+
 2012-11-01  Akim Demaille  <address@hidden>
 
        quote: provide a means to escape strings with nul characters
diff --git a/doc/posix-headers/errno.texi b/doc/posix-headers/errno.texi
index 54e0249..0166ddc 100644
--- a/doc/posix-headers/errno.texi
+++ b/doc/posix-headers/errno.texi
@@ -42,6 +42,9 @@ The macros @code{EOWNERDEAD}, @code{ENOTRECOVERABLE} are not 
defined on
 some platforms:
 glibc/Linux 2.3.6, glibc/Hurd 2.15, glibc/kFreeBSD 2.15,
 Mac OS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, 
HP-UX 11, IRIX 6.5, OSF/1 5.1, Cygwin, mingw without pthreads-win32, MSVC 9, 
Interix 3.5, BeOS.
address@hidden
+The macro @code{EILSEQ} is not defined on some platforms:
+LynxOS 178 2.2.2.
 @end itemize
 
 Portability problems not fixed by Gnulib:
diff --git a/lib/errno.in.h b/lib/errno.in.h
index 4fba101..ec18b41 100644
--- a/lib/errno.in.h
+++ b/lib/errno.in.h
@@ -270,5 +270,10 @@
 #  define GNULIB_defined_ENOTRECOVERABLE 1
 # endif
 
+# ifndef EILSEQ
+#  define EILSEQ 2015
+#  define GNULIB_defined_EILSEQ 1
+# endif
+
 #endif /* address@hidden@_ERRNO_H */
 #endif /* address@hidden@_ERRNO_H */
diff --git a/lib/strerror-override.c b/lib/strerror-override.c
index 9f55cfa..f7cac65 100644
--- a/lib/strerror-override.c
+++ b/lib/strerror-override.c
@@ -291,6 +291,11 @@ strerror_override (int errnum)
       return "State not recoverable";
 #endif
 
+#if GNULIB_defined_EILSEQ
+    case EILSEQ:
+      return "Invalid or incomplete multibyte or wide character";
+#endif
+
     default:
       return NULL;
     }
diff --git a/lib/strerror-override.h b/lib/strerror-override.h
index fe1fb2c..6468681 100644
--- a/lib/strerror-override.h
+++ b/lib/strerror-override.h
@@ -46,7 +46,8 @@
      || GNULIB_defined_EDQUOT \
      || GNULIB_defined_ECANCELED \
      || GNULIB_defined_EOWNERDEAD \
-     || GNULIB_defined_ENOTRECOVERABLE
+     || GNULIB_defined_ENOTRECOVERABLE \
+     || GNULIB_defined_EILSEQ
 extern const char *strerror_override (int errnum);
 # else
 #  define strerror_override(ignored) NULL
diff --git a/m4/errno_h.m4 b/m4/errno_h.m4
index 1e76ba2..4e33ba8 100644
--- a/m4/errno_h.m4
+++ b/m4/errno_h.m4
@@ -1,4 +1,4 @@
-# errno_h.m4 serial 11
+# errno_h.m4 serial 12
 dnl Copyright (C) 2004, 2006, 2008-2012 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -58,6 +58,9 @@ booboo
 #if !defined ENOTRECOVERABLE
 booboo
 #endif
+#if !defined EILSEQ
+booboo
+#endif
       ],
       [gl_cv_header_errno_h_complete=no],
       [gl_cv_header_errno_h_complete=yes])
-- 
1.7.11.7