Add argp implementation

Argp is an advanced support for parsing unix-style argument vectors.
In addition to the common getopt interface, it provides automatic
response
to `--help' and `--version' options and use of custom parser in
conjunction
with argp native option parser, among others.
Argp support is required by elfutils package and prelink.

In uClibc argp functionalities has been moved from C library to
libuargp.so
Further the libc.so linker script contains an AS_NEEDED entry so that
it doesn't need to link libuargp.so explicitely.

Disable argp test if feature disabled.

Signed-off-by: Salvatore Cro <salvatore.cro@st.com>
Signed-off-by: Filippo Arcidiacono <filippo.arcidiacono@st.com>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Waldemar Brodkorb <wbx@uclibc-ng.org>

12 files changed, 3865 insertions, 0 deletions

diff --git a/libuargp/Makefile b/libuargp/Makefile
new file mode 100644
index 000000000..45acdd9aa
--- /dev/null
+++ b/libuargp/Makefile
@@ -0,0 +1,14 @@
+# Makefile for uClibc (libuargp)
+#
+# Copyright (C) 2010 STMicroelectronics Ltd
+# Author(s): Filippo Arcidiacono <filippo.arcidiacono at st.com>
+#
+# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+#
+
+top_srcdir=../
+top_builddir=../
+include $(top_builddir)Rules.mak
+all: libs
+include Makefile.in
+include $(top_srcdir)Makerules
diff --git a/libuargp/Makefile.in b/libuargp/Makefile.in
new file mode 100644
index 000000000..1498abb69
--- /dev/null
+++ b/libuargp/Makefile.in
@@ -0,0 +1,73 @@
+# Makefile for uClibc (libuargp)
+#
+# Copyright (C) 2009, 2010  STMicroelectronics Ltd.
+# Author(s): Salvatore Cro <salvatore.cro at st.com>
+#            - First implementation, embedded into libc
+#            Filippo Arcidiacono <filippo.arcidiacono at st.com>
+#            - Reworked for stand-alone libuargp implementation
+
+# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+#
+
+CFLAGS-libuargp := -DNOT_IN_libc -DIS_IN_libuargp $(SSP_ALL_CFLAGS)
+
+LDFLAGS-libuargp.so := $(LDFLAGS)
+
+LIBS-libuargp.so := $(LIBS)
+
+libuargp_FULL_NAME := libuargp-$(VERSION).so
+
+libuargp_DIR := $(top_srcdir)libuargp
+libuargp_OUT := $(top_builddir)libuargp
+
+libuargp_SRC-y :=
+libuargp_SRC-$(UCLIBC_HAS_ARGP) := $(addsuffix .c,$(addprefix argp-, ba \
+			eexst fmtstream fs-xinl help parse pv pvh xinl))
+
+CFLAGS-argp-xinl.c = -fgnu89-inline
+
+libuargp_SRC := $(addprefix $(libuargp_DIR)/,$(libuargp_SRC-y))
+libuargp_OBJ := $(patsubst $(libuargp_DIR)/%.c,$(libuargp_OUT)/%.o,$(libuargp_SRC))
+
+libuargp_SRCS := $(libuargp_SRC)
+libuargp_OBJS := $(libuargp_OBJ)
+
+ifeq ($(DOPIC),y)
+libuargp-a-y := $(libuargp_OBJS:.o=.os)
+else
+libuargp-a-y := $(libuargp_OBJS)
+endif
+libuargp-so-y := $(libuargp_OBJS:.o=.os)
+
+lib-a-$(UCLIBC_HAS_ARGP) += $(top_builddir)lib/libuargp.a
+lib-so-$(UCLIBC_HAS_ARGP) += $(top_builddir)lib/libuargp.so
+
+objclean-y += CLEAN_libuargp
+
+ifeq ($(DOMULTI),n)
+ifeq ($(DOPIC),y)
+$(top_builddir)lib/libuargp.so: $(top_builddir)lib/libuargp.a $(libc.depend)
+else
+$(top_builddir)lib/libuargp.so: $(libuargp_OUT)/libuargp_so.a $(libc.depend)
+endif
+	$(call link.so,$(libuargp_FULL_NAME),$(MAJOR_VERSION))
+else
+$(top_builddir)lib/libuargp.so: $(libuargp_OUT)/libuargp.oS $(libc.depend)
+	$(call linkm.so,$(libuargp_FULL_NAME),$(MAJOR_VERSION))
+endif
+
+$(libuargp_OUT)/libuargp_so.a: $(libuargp-so-y)
+	$(Q)$(RM) $@
+	$(do_ar)
+
+$(libuargp_OUT)/libuargp.oS: $(libuargp_SRCS)
+	$(Q)$(RM) $@
+	$(compile-m)
+
+$(top_builddir)lib/libuargp.a: $(libuargp-a-y)
+	$(Q)$(INSTALL) -d $(dir $@)
+	$(Q)$(RM) $@
+	$(do_ar)
+
+CLEAN_libuargp:
+	$(do_rm) $(addprefix $(libuargp_OUT)/*., o os oS a)
diff --git a/libuargp/argp-ba.c b/libuargp/argp-ba.c
new file mode 100644
index 000000000..3522b029b
--- /dev/null
+++ b/libuargp/argp-ba.c
@@ -0,0 +1,26 @@
+/* Default definition for ARGP_PROGRAM_BUG_ADDRESS.
+   Copyright (C) 1996, 1997, 1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Written by Miles Bader <miles at gnu.ai.mit.edu>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/* If set by the user program, it should point to string that is the
+   bug-reporting address for the program.  It will be printed by argp_help if
+   the ARGP_HELP_BUG_ADDR flag is set (as it is by various standard help
+   messages), embedded in a sentence that says something like `Report bugs to
+   ADDR.'.  */
+const char *argp_program_bug_address;
diff --git a/libuargp/argp-eexst.c b/libuargp/argp-eexst.c
new file mode 100644
index 000000000..445b68d1f
--- /dev/null
+++ b/libuargp/argp-eexst.c
@@ -0,0 +1,32 @@
+/* Default definition for ARGP_ERR_EXIT_STATUS
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Written by Miles Bader <miles at gnu.ai.mit.edu>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <sysexits.h>
+
+#include <argp.h>
+
+/* The exit status that argp will use when exiting due to a parsing error.
+   If not defined or set by the user program, this defaults to EX_USAGE from
+   <sysexits.h>.  */
+error_t argp_err_exit_status = EX_USAGE;
diff --git a/libuargp/argp-fmtstream.c b/libuargp/argp-fmtstream.c
new file mode 100644
index 000000000..75227f93c
--- /dev/null
+++ b/libuargp/argp-fmtstream.c
@@ -0,0 +1,439 @@
+/* Word-wrapping and line-truncating streams
+   Copyright (C) 1997-1999,2001,2002,2003,2005 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Written by Miles Bader <miles at gnu.ai.mit.edu>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.
+
+   Modified for uClibc by: Salvatore Cro <salvatore.cro at st.com>
+*/
+
+/* This package emulates glibc `line_wrap_stream' semantics for systems that
+   don't have that.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <ctype.h>
+
+#include "argp-fmtstream.h"
+
+#ifndef ARGP_FMTSTREAM_USE_LINEWRAP
+
+#ifndef isblank
+#define isblank(ch) ((ch)==' ' || (ch)=='\t')
+#endif
+
+#if defined _LIBC && defined USE_IN_LIBIO
+# include <wchar.h>
+# include <libio/libioP.h>
+# define __vsnprintf(s, l, f, a) _IO_vsnprintf (s, l, f, a)
+#else
+# define __vsnprintf(s, l, f, a) vsnprintf (s, l, f, a)
+#endif
+
+#define INIT_BUF_SIZE 200
+#define PRINTF_SIZE_GUESS 150
+
+/* Return an argp_fmtstream that outputs to STREAM, and which prefixes lines
+   written on it with LMARGIN spaces and limits them to RMARGIN columns
+   total.  If WMARGIN >= 0, words that extend past RMARGIN are wrapped by
+   replacing the whitespace before them with a newline and WMARGIN spaces.
+   Otherwise, chars beyond RMARGIN are simply dropped until a newline.
+   Returns NULL if there was an error.  */
+argp_fmtstream_t
+__argp_make_fmtstream (FILE *stream,
+                      size_t lmargin, size_t rmargin, ssize_t wmargin)
+{
+  argp_fmtstream_t fs;
+
+  fs = (struct argp_fmtstream *) malloc (sizeof (struct argp_fmtstream));
+  if (fs != NULL)
+    {
+      fs->stream = stream;
+
+      fs->lmargin = lmargin;
+      fs->rmargin = rmargin;
+      fs->wmargin = wmargin;
+      fs->point_col = 0;
+      fs->point_offs = 0;
+
+      fs->buf = (char *) malloc (INIT_BUF_SIZE);
+      if (! fs->buf)
+       {
+         free (fs);
+         fs = 0;
+       }
+      else
+       {
+         fs->p = fs->buf;
+         fs->end = fs->buf + INIT_BUF_SIZE;
+       }
+    }
+
+  return fs;
+}
+#if 0
+/* Not exported.  */
+#ifdef weak_alias
+weak_alias (__argp_make_fmtstream, argp_make_fmtstream)
+#endif
+#endif
+
+/* Flush FS to its stream, and free it (but don't close the stream).  */
+void
+__argp_fmtstream_free (argp_fmtstream_t fs)
+{
+  __argp_fmtstream_update (fs);
+  if (fs->p > fs->buf)
+    {
+#ifdef USE_IN_LIBIO
+      __fxprintf (fs->stream, "%.*s", (int) (fs->p - fs->buf), fs->buf);
+#else
+      fwrite_unlocked (fs->buf, 1, fs->p - fs->buf, fs->stream);
+#endif
+    }
+  free (fs->buf);
+  free (fs);
+}
+#if 0
+/* Not exported.  */
+#ifdef weak_alias
+weak_alias (__argp_fmtstream_free, argp_fmtstream_free)
+#endif
+#endif
+
+/* Process FS's buffer so that line wrapping is done from POINT_OFFS to the
+   end of its buffer.  This code is mostly from glibc stdio/linewrap.c.  */
+void
+__argp_fmtstream_update (argp_fmtstream_t fs)
+{
+  char *buf, *nl;
+  size_t len;
+
+  /* Scan the buffer for newlines.  */
+  buf = fs->buf + fs->point_offs;
+  while (buf < fs->p)
+    {
+      size_t r;
+
+      if (fs->point_col == 0 && fs->lmargin != 0)
+       {
+         /* We are starting a new line.  Print spaces to the left margin.  */
+         const size_t pad = fs->lmargin;
+         if (fs->p + pad < fs->end)
+           {
+             /* We can fit in them in the buffer by moving the
+                buffer text up and filling in the beginning.  */
+             memmove (buf + pad, buf, fs->p - buf);
+             fs->p += pad; /* Compensate for bigger buffer. */
+             memset (buf, ' ', pad); /* Fill in the spaces.  */
+             buf += pad; /* Don't bother searching them.  */
+           }
+         else
+           {
+             /* No buffer space for spaces.  Must flush.  */
+             size_t i;
+             for (i = 0; i < pad; i++)
+               {
+#ifdef USE_IN_LIBIO
+                 if (_IO_fwide (fs->stream, 0) > 0)
+                   putwc_unlocked (L' ', fs->stream);
+                 else
+#endif
+                   putc_unlocked (' ', fs->stream);
+               }
+           }
+         fs->point_col = pad;
+       }
+
+      len = fs->p - buf;
+      nl = memchr (buf, '\n', len);
+
+      if (fs->point_col < 0)
+       fs->point_col = 0;
+
+      if (!nl)
+       {
+         /* The buffer ends in a partial line.  */
+
+         if (fs->point_col + len < fs->rmargin)
+           {
+             /* The remaining buffer text is a partial line and fits
+                within the maximum line width.  Advance point for the
+                characters to be written and stop scanning.  */
+             fs->point_col += len;
+             break;
+           }
+         else
+           /* Set the end-of-line pointer for the code below to
+              the end of the buffer.  */
+           nl = fs->p;
+       }
+      else if (fs->point_col + (nl - buf) < (ssize_t) fs->rmargin)
+       {
+         /* The buffer contains a full line that fits within the maximum
+            line width.  Reset point and scan the next line.  */
+         fs->point_col = 0;
+         buf = nl + 1;
+         continue;
+       }
+
+      /* This line is too long.  */
+      r = fs->rmargin - 1;
+
+      if (fs->wmargin < 0)
+       {
+         /* Truncate the line by overwriting the excess with the
+            newline and anything after it in the buffer.  */
+         if (nl < fs->p)
+           {
+             memmove (buf + (r - fs->point_col), nl, fs->p - nl);
+             fs->p -= buf + (r - fs->point_col) - nl;
+             /* Reset point for the next line and start scanning it.  */
+             fs->point_col = 0;
+             buf += r + 1; /* Skip full line plus \n. */
+           }
+         else
+           {
+             /* The buffer ends with a partial line that is beyond the
+                maximum line width.  Advance point for the characters
+                written, and discard those past the max from the buffer.  */
+             fs->point_col += len;
+             fs->p -= fs->point_col - r;
+             break;
+           }
+       }
+      else
+       {
+         /* Do word wrap.  Go to the column just past the maximum line
+            width and scan back for the beginning of the word there.
+            Then insert a line break.  */
+
+         char *p, *nextline;
+         int i;
+
+         p = buf + (r + 1 - fs->point_col);
+         while (p >= buf && !isblank (*p))
+           --p;
+         nextline = p + 1;     /* This will begin the next line.  */
+
+         if (nextline > buf)
+           {
+             /* Swallow separating blanks.  */
+             if (p >= buf)
+               do
+                 --p;
+               while (p >= buf && isblank (*p));
+             nl = p + 1;       /* The newline will replace the first blank. */
+           }
+         else
+           {
+             /* A single word that is greater than the maximum line width.
+                Oh well.  Put it on an overlong line by itself.  */
+             p = buf + (r + 1 - fs->point_col);
+             /* Find the end of the long word.  */
+             do
+               ++p;
+             while (p < nl && !isblank (*p));
+             if (p == nl)
+               {
+                 /* It already ends a line.  No fussing required.  */
+                 fs->point_col = 0;
+                 buf = nl + 1;
+                 continue;
+               }
+             /* We will move the newline to replace the first blank.  */
+             nl = p;
+             /* Swallow separating blanks.  */
+             do
+               ++p;
+             while (isblank (*p));
+             /* The next line will start here.  */
+             nextline = p;
+           }
+
+         /* Note: There are a bunch of tests below for
+            NEXTLINE == BUF + LEN + 1; this case is where NL happens to fall
+            at the end of the buffer, and NEXTLINE is in fact empty (and so
+            we need not be careful to maintain its contents).  */
+
+         if ((nextline == buf + len + 1
+              ? fs->end - nl < fs->wmargin + 1
+              : nextline - (nl + 1) < fs->wmargin)
+             && fs->p > nextline)
+           {
+             /* The margin needs more blanks than we removed.  */
+             if (fs->end - fs->p > fs->wmargin + 1)
+               /* Make some space for them.  */
+               {
+                 size_t mv = fs->p - nextline;
+                 memmove (nl + 1 + fs->wmargin, nextline, mv);
+                 nextline = nl + 1 + fs->wmargin;
+                 len = nextline + mv - buf;
+                 *nl++ = '\n';
+               }
+             else
+               /* Output the first line so we can use the space.  */
+               {
+#if defined _LIBC && defined USE_IN_LIBIO
+                 __fxprintf (fs->stream, "%.*s\n",
+                             (int) (nl - fs->buf), fs->buf);
+#else
+                 if (nl > fs->buf)
+                   fwrite_unlocked (fs->buf, 1, nl - fs->buf, fs->stream);
+                 putc_unlocked ('\n', fs->stream);
+#endif
+
+                 len += buf - fs->buf;
+                 nl = buf = fs->buf;
+               }
+           }
+         else
+           /* We can fit the newline and blanks in before
+              the next word.  */
+           *nl++ = '\n';
+
+         if (nextline - nl >= fs->wmargin
+             || (nextline == buf + len + 1 && fs->end - nextline >= fs->wmargin))
+           /* Add blanks up to the wrap margin column.  */
+           for (i = 0; i < fs->wmargin; ++i)
+             *nl++ = ' ';
+         else
+           for (i = 0; i < fs->wmargin; ++i)
+#ifdef USE_IN_LIBIO
+             if (_IO_fwide (fs->stream, 0) > 0)
+               putwc_unlocked (L' ', fs->stream);
+             else
+#endif
+               putc_unlocked (' ', fs->stream);
+
+         /* Copy the tail of the original buffer into the current buffer
+            position.  */
+         if (nl < nextline)
+           memmove (nl, nextline, buf + len - nextline);
+         len -= nextline - buf;
+
+         /* Continue the scan on the remaining lines in the buffer.  */
+         buf = nl;
+
+         /* Restore bufp to include all the remaining text.  */
+         fs->p = nl + len;
+
+         /* Reset the counter of what has been output this line.  If wmargin
+            is 0, we want to avoid the lmargin getting added, so we set
+            point_col to a magic value of -1 in that case.  */
+         fs->point_col = fs->wmargin ? fs->wmargin : -1;
+       }
+    }
+
+  /* Remember that we've scanned as far as the end of the buffer.  */
+  fs->point_offs = fs->p - fs->buf;
+}
+
+/* Ensure that FS has space for AMOUNT more bytes in its buffer, either by
+   growing the buffer, or by flushing it.  True is returned iff we succeed. */
+int
+__argp_fmtstream_ensure (struct argp_fmtstream *fs, size_t amount)
+{
+  if ((size_t) (fs->end - fs->p) < amount)
+    {
+      ssize_t wrote;
+
+      /* Flush FS's buffer.  */
+      __argp_fmtstream_update (fs);
+
+#if defined _LIBC && defined USE_IN_LIBIO
+      __fxprintf (fs->stream, "%.*s", (int) (fs->p - fs->buf), fs->buf);
+      wrote = fs->p - fs->buf;
+#else
+      wrote = fwrite_unlocked (fs->buf, 1, fs->p - fs->buf, fs->stream);
+#endif
+      if (wrote == fs->p - fs->buf)
+       {
+         fs->p = fs->buf;
+         fs->point_offs = 0;
+       }
+      else
+       {
+         fs->p -= wrote;
+         fs->point_offs -= wrote;
+         memmove (fs->buf, fs->buf + wrote, fs->p - fs->buf);
+         return 0;
+       }
+
+      if ((size_t) (fs->end - fs->buf) < amount)
+       /* Gotta grow the buffer.  */
+       {
+         size_t old_size = fs->end - fs->buf;
+         size_t new_size = old_size + amount;
+         char *new_buf;
+
+         if (new_size < old_size || ! (new_buf = realloc (fs->buf, new_size)))
+           {
+             __set_errno (ENOMEM);
+             return 0;
+           }
+
+         fs->buf = new_buf;
+         fs->end = new_buf + new_size;
+         fs->p = fs->buf;
+       }
+    }
+
+  return 1;
+}
+
+ssize_t
+__argp_fmtstream_printf (struct argp_fmtstream *fs, const char *fmt, ...)
+{
+  int out;
+  size_t avail;
+  size_t size_guess = PRINTF_SIZE_GUESS; /* How much space to reserve. */
+
+  do
+    {
+      va_list args;
+
+      if (! __argp_fmtstream_ensure (fs, size_guess))
+       return -1;
+
+      va_start (args, fmt);
+      avail = fs->end - fs->p;
+      out = __vsnprintf (fs->p, avail, fmt, args);
+      va_end (args);
+      if ((size_t) out >= avail)
+       size_guess = out + 1;
+    }
+  while ((size_t) out >= avail);
+
+  fs->p += out;
+
+  return out;
+}
+#if 0
+/* Not exported.  */
+#ifdef weak_alias
+weak_alias (__argp_fmtstream_printf, argp_fmtstream_printf)
+#endif
+#endif
+
+#endif /* !ARGP_FMTSTREAM_USE_LINEWRAP */
diff --git a/libuargp/argp-fmtstream.h b/libuargp/argp-fmtstream.h
new file mode 100644
index 000000000..ca7c83402
--- /dev/null
+++ b/libuargp/argp-fmtstream.h
@@ -0,0 +1,314 @@
+/* Word-wrapping and line-truncating streams.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Written by Miles Bader <miles at gnu.ai.mit.edu>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.
+
+   Modified for uClibc by: Salvatore Cro <salvatore.cro at st.com>
+*/
+
+/* This package emulates glibc `line_wrap_stream' semantics for systems that
+   don't have that.  If the system does have it, it is just a wrapper for
+   that.  This header file is only used internally while compiling argp, and
+   shouldn't be installed.  */
+
+#ifndef _ARGP_FMTSTREAM_H
+#define _ARGP_FMTSTREAM_H
+
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#ifndef __attribute__
+/* This feature is available in gcc versions 2.5 and later.  */
+# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || defined(__STRICT_ANSI__)
+#  define __attribute__(Spec) /* empty */
+# endif
+/* The __-protected variants of `format' and `printf' attributes
+   are accepted by gcc versions 2.6.4 (effectively 2.7) and later.  */
+# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7) || defined(__STRICT_ANSI__)
+#  define __format__ format
+#  define __printf__ printf
+# endif
+#endif
+
+#if 0 /* uClibc: disabled */
+#if    (_LIBC - 0 && !defined (USE_IN_LIBIO)) \
+    || (defined (__GNU_LIBRARY__) && defined (HAVE_LINEWRAP_H))
+/* line_wrap_stream is available, so use that.  */
+#define ARGP_FMTSTREAM_USE_LINEWRAP
+#endif
+#else
+/* line_wrap stream NOT available */
+# undef ARGP_FMTSTREAM_USE_LINEWRAP
+#endif
+
+#ifdef ARGP_FMTSTREAM_USE_LINEWRAP
+/* Just be a simple wrapper for line_wrap_stream; the semantics are
+   *slightly* different, as line_wrap_stream doesn't actually make a new
+   object, it just modifies the given stream (reversibly) to do
+   line-wrapping.  Since we control who uses this code, it doesn't matter.  */
+
+#include <linewrap.h>
+
+typedef FILE *argp_fmtstream_t;
+
+#define argp_make_fmtstream line_wrap_stream
+#define __argp_make_fmtstream line_wrap_stream
+#define argp_fmtstream_free line_unwrap_stream
+#define __argp_fmtstream_free line_unwrap_stream
+
+#define __argp_fmtstream_putc(fs,ch) putc(ch,fs)
+#define argp_fmtstream_putc(fs,ch) putc(ch,fs)
+#define __argp_fmtstream_puts(fs,str) fputs(str,fs)
+#define argp_fmtstream_puts(fs,str) fputs(str,fs)
+#define __argp_fmtstream_write(fs,str,len) fwrite(str,1,len,fs)
+#define argp_fmtstream_write(fs,str,len) fwrite(str,1,len,fs)
+#define __argp_fmtstream_printf fprintf
+#define argp_fmtstream_printf fprintf
+
+#define __argp_fmtstream_lmargin line_wrap_lmargin
+#define argp_fmtstream_lmargin line_wrap_lmargin
+#define __argp_fmtstream_set_lmargin line_wrap_set_lmargin
+#define argp_fmtstream_set_lmargin line_wrap_set_lmargin
+#define __argp_fmtstream_rmargin line_wrap_rmargin
+#define argp_fmtstream_rmargin line_wrap_rmargin
+#define __argp_fmtstream_set_rmargin line_wrap_set_rmargin
+#define argp_fmtstream_set_rmargin line_wrap_set_rmargin
+#define __argp_fmtstream_wmargin line_wrap_wmargin
+#define argp_fmtstream_wmargin line_wrap_wmargin
+#define __argp_fmtstream_set_wmargin line_wrap_set_wmargin
+#define argp_fmtstream_set_wmargin line_wrap_set_wmargin
+#define __argp_fmtstream_point line_wrap_point
+#define argp_fmtstream_point line_wrap_point
+
+#else /* !ARGP_FMTSTREAM_USE_LINEWRAP */
+/* Guess we have to define our own version.  */
+
+#ifndef __const
+#define __const const
+#endif
+
+struct argp_fmtstream
+{
+  FILE *stream;                        /* The stream we're outputting to.  */
+
+  size_t lmargin, rmargin;     /* Left and right margins.  */
+  ssize_t wmargin;             /* Margin to wrap to, or -1 to truncate.  */
+
+  /* Point in buffer to which we've processed for wrapping, but not output.  */
+  size_t point_offs;
+  /* Output column at POINT_OFFS, or -1 meaning 0 but don't add lmargin.  */
+  ssize_t point_col;
+
+  char *buf;                   /* Output buffer.  */
+  char *p;                     /* Current end of text in BUF. */
+  char *end;                   /* Absolute end of BUF.  */
+};
+
+typedef struct argp_fmtstream *argp_fmtstream_t;
+
+/* Return an argp_fmtstream that outputs to STREAM, and which prefixes lines
+   written on it with LMARGIN spaces and limits them to RMARGIN columns
+   total.  If WMARGIN >= 0, words that extend past RMARGIN are wrapped by
+   replacing the whitespace before them with a newline and WMARGIN spaces.
+   Otherwise, chars beyond RMARGIN are simply dropped until a newline.
+   Returns NULL if there was an error.  */
+extern argp_fmtstream_t __argp_make_fmtstream (FILE *__stream,
+                                              size_t __lmargin,
+                                              size_t __rmargin,
+                                              ssize_t __wmargin);
+extern argp_fmtstream_t argp_make_fmtstream (FILE *__stream,
+                                            size_t __lmargin,
+                                            size_t __rmargin,
+                                            ssize_t __wmargin);
+
+/* Flush __FS to its stream, and free it (but don't close the stream).  */
+extern void __argp_fmtstream_free (argp_fmtstream_t __fs);
+extern void argp_fmtstream_free (argp_fmtstream_t __fs);
+
+extern ssize_t __argp_fmtstream_printf (argp_fmtstream_t __fs,
+                                      __const char *__fmt, ...)
+     __attribute__ ((__format__ (printf, 2, 3)));
+extern ssize_t argp_fmtstream_printf (argp_fmtstream_t __fs,
+                                     __const char *__fmt, ...)
+     __attribute__ ((__format__ (printf, 2, 3)));
+
+extern int __argp_fmtstream_putc (argp_fmtstream_t __fs, int __ch);
+extern int argp_fmtstream_putc (argp_fmtstream_t __fs, int __ch);
+
+extern int __argp_fmtstream_puts (argp_fmtstream_t __fs, __const char *__str);
+extern int argp_fmtstream_puts (argp_fmtstream_t __fs, __const char *__str);
+
+extern size_t __argp_fmtstream_write (argp_fmtstream_t __fs,
+                                     __const char *__str, size_t __len);
+extern size_t argp_fmtstream_write (argp_fmtstream_t __fs,
+                                   __const char *__str, size_t __len);
+
+/* Access macros for various bits of state.  */
+#define argp_fmtstream_lmargin(__fs) ((__fs)->lmargin)
+#define argp_fmtstream_rmargin(__fs) ((__fs)->rmargin)
+#define argp_fmtstream_wmargin(__fs) ((__fs)->wmargin)
+#define __argp_fmtstream_lmargin argp_fmtstream_lmargin
+#define __argp_fmtstream_rmargin argp_fmtstream_rmargin
+#define __argp_fmtstream_wmargin argp_fmtstream_wmargin
+
+/* Set __FS's left margin to LMARGIN and return the old value.  */
+extern size_t argp_fmtstream_set_lmargin (argp_fmtstream_t __fs,
+                                         size_t __lmargin);
+extern size_t __argp_fmtstream_set_lmargin (argp_fmtstream_t __fs,
+                                           size_t __lmargin);
+
+/* Set __FS's right margin to __RMARGIN and return the old value.  */
+extern size_t argp_fmtstream_set_rmargin (argp_fmtstream_t __fs,
+                                         size_t __rmargin);
+extern size_t __argp_fmtstream_set_rmargin (argp_fmtstream_t __fs,
+                                           size_t __rmargin);
+
+/* Set __FS's wrap margin to __WMARGIN and return the old value.  */
+extern size_t argp_fmtstream_set_wmargin (argp_fmtstream_t __fs,
+                                         size_t __wmargin);
+extern size_t __argp_fmtstream_set_wmargin (argp_fmtstream_t __fs,
+                                           size_t __wmargin);
+
+/* Return the column number of the current output point in __FS.  */
+extern size_t argp_fmtstream_point (argp_fmtstream_t __fs);
+extern size_t __argp_fmtstream_point (argp_fmtstream_t __fs);
+
+/* Internal routines.  */
+extern void _argp_fmtstream_update (argp_fmtstream_t __fs);
+extern void __argp_fmtstream_update (argp_fmtstream_t __fs);
+extern int _argp_fmtstream_ensure (argp_fmtstream_t __fs, size_t __amount);
+extern int __argp_fmtstream_ensure (argp_fmtstream_t __fs, size_t __amount);
+
+#ifdef __OPTIMIZE__
+/* Inline versions of above routines.  */
+
+#if !_LIBC
+#define __argp_fmtstream_putc argp_fmtstream_putc
+#define __argp_fmtstream_puts argp_fmtstream_puts
+#define __argp_fmtstream_write argp_fmtstream_write
+#define __argp_fmtstream_set_lmargin argp_fmtstream_set_lmargin
+#define __argp_fmtstream_set_rmargin argp_fmtstream_set_rmargin
+#define __argp_fmtstream_set_wmargin argp_fmtstream_set_wmargin
+#define __argp_fmtstream_point argp_fmtstream_point
+#define __argp_fmtstream_update _argp_fmtstream_update
+#define __argp_fmtstream_ensure _argp_fmtstream_ensure
+#endif
+
+#ifndef ARGP_FS_EI
+#define ARGP_FS_EI __extern_inline
+#endif
+
+ARGP_FS_EI size_t
+__argp_fmtstream_write (argp_fmtstream_t __fs,
+                       __const char *__str, size_t __len)
+{
+  if (__fs->p + __len <= __fs->end || __argp_fmtstream_ensure (__fs, __len))
+    {
+      memcpy (__fs->p, __str, __len);
+      __fs->p += __len;
+      return __len;
+    }
+  else
+    return 0;
+}
+
+ARGP_FS_EI int
+__argp_fmtstream_puts (argp_fmtstream_t __fs, __const char *__str)
+{
+  size_t __len = strlen (__str);
+  if (__len)
+    {
+      size_t __wrote = __argp_fmtstream_write (__fs, __str, __len);
+      return __wrote == __len ? 0 : -1;
+    }
+  else
+    return 0;
+}
+
+ARGP_FS_EI int
+__argp_fmtstream_putc (argp_fmtstream_t __fs, int __ch)
+{
+  if (__fs->p < __fs->end || __argp_fmtstream_ensure (__fs, 1))
+    return *__fs->p++ = __ch;
+  else
+    return EOF;
+}
+
+/* Set __FS's left margin to __LMARGIN and return the old value.  */
+ARGP_FS_EI size_t
+__argp_fmtstream_set_lmargin (argp_fmtstream_t __fs, size_t __lmargin)
+{
+  size_t __old;
+  if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs)
+    __argp_fmtstream_update (__fs);
+  __old = __fs->lmargin;
+  __fs->lmargin = __lmargin;
+  return __old;
+}
+
+/* Set __FS's right margin to __RMARGIN and return the old value.  */
+ARGP_FS_EI size_t
+__argp_fmtstream_set_rmargin (argp_fmtstream_t __fs, size_t __rmargin)
+{
+  size_t __old;
+  if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs)
+    __argp_fmtstream_update (__fs);
+  __old = __fs->rmargin;
+  __fs->rmargin = __rmargin;
+  return __old;
+}
+
+/* Set FS's wrap margin to __WMARGIN and return the old value.  */
+ARGP_FS_EI size_t
+__argp_fmtstream_set_wmargin (argp_fmtstream_t __fs, size_t __wmargin)
+{
+  size_t __old;
+  if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs)
+    __argp_fmtstream_update (__fs);
+  __old = __fs->wmargin;
+  __fs->wmargin = __wmargin;
+  return __old;
+}
+
+/* Return the column number of the current output point in __FS.  */
+ARGP_FS_EI size_t
+__argp_fmtstream_point (argp_fmtstream_t __fs)
+{
+  if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs)
+    __argp_fmtstream_update (__fs);
+  return __fs->point_col >= 0 ? __fs->point_col : 0;
+}
+
+#if !_LIBC
+#undef __argp_fmtstream_putc
+#undef __argp_fmtstream_puts
+#undef __argp_fmtstream_write
+#undef __argp_fmtstream_set_lmargin
+#undef __argp_fmtstream_set_rmargin
+#undef __argp_fmtstream_set_wmargin
+#undef __argp_fmtstream_point
+#undef __argp_fmtstream_update
+#undef __argp_fmtstream_ensure
+#endif
+
+#endif /* __OPTIMIZE__ */