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>

1 files changed, 136 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/common/bits/getopt_int.h b/libc/sysdeps/linux/common/bits/getopt_int.h
new file mode 100644
index 000000000..291edfe24
--- /dev/null
+++ b/libc/sysdeps/linux/common/bits/getopt_int.h
@@ -0,0 +1,136 @@
+/* Internal declarations for getopt.
+   Copyright (C) 1989-1994,1996-1999,2001,2003,2004
+   Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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.  */
+
+#ifndef _GETOPT_INT_H
+#define _GETOPT_INT_H  1
+
+extern int _getopt_internal (int ___argc, char *const *___argv,
+                            const char *__shortopts,
+                            const struct option *__longopts, int *__longind,
+                            int __long_only) attribute_hidden;
+
+
+/* Reentrant versions which can handle parsing multiple argument
+   vectors at the same time.  */
+
+/* For __ordering member */
+enum {
+       REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
+};
+
+/* Data type for reentrant functions.  */
+
+struct _getopt_data
+{
+  /* These have exactly the same meaning as the corresponding global
+     variables, except that they are used for the reentrant
+     versions of getopt.  */
+  int optind;
+  int opterr;
+  char *optarg;
+  smalluint optopt; /* we store characters here, a byte is enough */
+
+  /* Internal members.  */
+
+  /* True if the internal members have been initialized.  */
+  smallint __initialized;
+
+  /* Describe how to deal with options that follow non-option ARGV-elements.
+
+     If the caller did not specify anything,
+     the default is REQUIRE_ORDER if the environment variable
+     POSIXLY_CORRECT is defined, PERMUTE otherwise.
+
+     REQUIRE_ORDER means don't recognize them as options;
+     stop option processing when the first non-option is seen.
+     This is what Unix does.
+     This mode of operation is selected by either setting the environment
+     variable POSIXLY_CORRECT, or using `+' as the first character
+     of the list of option characters.
+
+     PERMUTE is the default.  We permute the contents of ARGV as we
+     scan, so that eventually all the non-options are at the end.
+     This allows options to be given in any order, even with programs
+     that were not written to expect this.
+
+     RETURN_IN_ORDER is an option available to programs that were
+     written to expect options and other ARGV-elements in any order
+     and that care about the ordering of the two.  We describe each
+     non-option ARGV-element as if it were the argument of an option
+     with character code 1.  Using `-' as the first character of the
+     list of option characters selects this mode of operation.
+
+     The special argument `--' forces an end of option-scanning regardless
+     of the value of `ordering'.  In the case of RETURN_IN_ORDER, only
+     `--' can cause `getopt' to return -1 with `optind' != ARGC.  */
+  smallint __ordering;
+
+  /* If the POSIXLY_CORRECT environment variable is set.  */
+  smallint __posixly_correct;
+
+  /* The next char to be scanned in the option-element
+     in which the last option character we returned was found.
+     This allows us to pick up the scan where we left off.
+
+     If this is zero, or a null string, it means resume the scan
+     by advancing to the next ARGV-element.  */
+  char *__nextchar;
+
+
+  /* Handle permutation of arguments.  */
+
+  /* Describe the part of ARGV that contains non-options that have
+     been skipped.  `first_nonopt' is the index in ARGV of the first
+     of them; `last_nonopt' is the index after the last of them.  */
+
+  int __first_nonopt;
+  int __last_nonopt;
+
+#if defined _LIBC && defined USE_NONOPTION_FLAGS
+  int __nonoption_flags_max_len;
+  int __nonoption_flags_len;
+# endif
+};
+
+/* The initializer is necessary to set OPTIND and OPTERR to their
+   default values and to clear the initialization flag.  */
+#define _GETOPT_DATA_INITIALIZER       { 1, 1 }
+
+#if 0 /* first is static on uClibc, the others not used */
+extern int _getopt_internal_r (int ___argc, char *const *___argv,
+                              const char *__shortopts,
+                              const struct option *__longopts, int *__longind,
+                              int __long_only, struct _getopt_data *__data);
+#endif
+#if defined __UCLIBC_HAS_GNU_GETOPT__ || defined __UCLIBC_HAS_GETOPT_LONG__
+#ifndef __need_getopt
+extern int _getopt_long_r (int ___argc, char *const *___argv,
+                          const char *__shortopts,
+                          const struct option *__longopts, int *__longind,
+                          struct _getopt_data *__data);
+
+extern int _getopt_long_only_r (int ___argc, char *const *___argv,
+                               const char *__shortopts,
+                               const struct option *__longopts,
+                               int *__longind,
+                               struct _getopt_data *__data);
+#endif
+#endif
+#endif /* getopt_int.h */