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This is gpgrt.info, produced by makeinfo version 6.5 from gpgrt.texi.

This manual is for Libgpg-error (version 1.47, 16 December 2022), which
is a library for code used by all GnuPG related packages.

Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version. The text of the
license can be found in the section entitled "GNU General Public
License".
INFO-DIR-SECTION Libraries
START-INFO-DIR-ENTRY
* libgpg-error: (gpgrt). Error codes and common code for GnuPG.
END-INFO-DIR-ENTRY

File: gpgrt.info, Node: Top, Next: Introduction, Up: (dir)

The Libgpg-error Library
************************

This manual is for Libgpg-error (version 1.47, 16 December 2022), which
is a library for code used by all GnuPG related packages.

* Menu:

* Introduction:: What is Libgpg-error.
* Preparation:: What you should do before using the library.
* Generalities:: General library functions and data types.
* Tools:: Utility tools

Appendices

* Library Copying:: The GNU Lesser General Public License
says how you can copy and share Libgpg-error.
* Copying:: The GNU General Public License says how you
can copy and share some parts of Libgpg-error.

Indices

* Concept Index:: Index of concepts and programs.
* Function and Data Index:: Index of functions, variables and data types.

File: gpgrt.info, Node: Introduction, Next: Preparation, Prev: Top, Up: Top

1 Introduction
**************

Libgpg-error is a library to provide error codes for GnuPG and relates
software as well as some other general purpose functions. It is planned
to eventually rename this library to "gpgrt" (for GnuPG RunTime).

* Menu:

* Getting Started:: How to use this manual.
* Features:: A glance at Libgpg-error’s features.
* Overview:: Overview about the library.

File: gpgrt.info, Node: Getting Started, Next: Features, Up: Introduction

1.1 Getting Started
===================

This manual documents the Libgpg-error library application programming
interface (API). The goal is to that all functions and data types
provided by the library are explained. However, for now this is only a
stub and not very useful.

File: gpgrt.info, Node: Features, Next: Overview, Prev: Getting Started, Up: Introduction

1.2 Features
============

TBD

File: gpgrt.info, Node: Overview, Prev: Features, Up: Introduction

1.3 Overview
============

The Libgpg-error library is fully thread-safe, where it makes sense to
be thread-safe.

TBD

File: gpgrt.info, Node: Preparation, Next: Generalities, Prev: Introduction, Up: Top

2 Preparation
*************

To use Libgpg-error, you have to perform some changes to your sources
and the build system. The necessary changes are small and explained in
the following sections. At the end of this chapter, it is described how
the library is initialized, and how the requirements of the library are
verified.

* Menu:

* Header:: What header file you need to include.
* Building sources:: How to build sources using the library.
* Building sources using Automake:: How to build sources with the help of Automake.
* Initializing the library:: How to initialize the library.
* Multi-Threading:: How Libgpg-error can be used in a MT environment.

File: gpgrt.info, Node: Header, Next: Building sources, Up: Preparation

2.1 Header
==========

All interfaces (data types and functions) of the library are defined in
the header file 'gpg-error.h'. You must include this in all source
files using the library, either directly or through some other header
file, like this:

#include <gpg-error.h>

Note well that the header file is platform specific and may only be
used on the platform for which it has been build.

The name space of Libgpg-error is 'gpg_*' and 'gpgrt*' for function
and type names and 'GPG_*' and 'GPGRT_*' for other symbols. In addition
the same name prefixes with one prepended underscore are reserved for
internal use and should never be used by an application.

Certain parts of gpg-error.h may be included by defining these macros:

'GPG_ERR_ENABLE_GETTEXT_MACROS'
Define to provide macros to map the internal gettext API to
standard names. This has only an effect on Windows platforms.

'GPGRT_ENABLE_ES_MACROS'
Define to provide "es_" macros for the estream functions.

File: gpgrt.info, Node: Building sources, Next: Building sources using Automake, Prev: Header, Up: Preparation

2.2 Building sources
====================

If you want to compile a source file including the 'gpg-error.h' header
file, you must make sure that the compiler can find it in the directory
hierarchy. This is accomplished by adding the path to the directory in
which the header file is located to the compilers include file search
path (via the '-I' option).

However, the path to the include file is determined at the time the
source is configured. To solve this problem, Libgpg-error ships with a
pkg-config file: gpg-error.pc.

The options that need to be added to the compiler invocation at
compile time are output by the '--cflags' option to 'pkg-config'. The
following example shows how it can be used at the command line:

gcc -c foo.c $(pkg-config --cflags gpg-error)

Adding the output of 'pkg-config --cflags gpg-error' to the
compiler’s command line will ensure that the compiler can find the
Libgpg-error header file.

A similar problem occurs when linking the program with the library.
Again, the compiler has to find the library files. For this to work,
the path to the library files has to be added to the library search path
(via the '-L' option). For this, the option '--libs' to 'pkg-config'
can be used. The example shows how to link 'foo.o' with the
Libgpg-error library to a program 'foo'.

gcc -o foo foo.o $(pkg-config --libs gpg-error)

Of course you can also combine both examples to a single command by
specifying both options to 'pkg-config':

gcc -o foo foo.c $(pkg-config --cflags --libs gpg-error)

For GnuPG and its friends, which are usually needed to be built
earlier in a stage of OS bootstrap, Libgpg-error ships the small helper
program 'gpgrt-config'. This helper program is a sort of 'pkg-config'
replacement for limited environment, supporting cross compilation, as
well as multilib and multi-arch installation. Note that 'gpgrt-config'
is not for general use for other programs. 'gpgrt-config' requires
invocation with the option '--lib=' so that it locates the appropriate
path to 'gpg-error.pc'.

File: gpgrt.info, Node: Building sources using Automake, Next: Initializing the library, Prev: Building sources, Up: Preparation

2.3 Building sources using Automake
===================================

It is much easier if you use GNU Automake instead of writing your own
Makefiles. If you do that, you do not have to worry about finding and
invoking the 'pkg-config' or 'gpgrt-config' script at all. Libgpg-error
provides an extension to Automake that does all the work for you. That
is offered by 'gpg-error.m4'.

-- Macro: AM_PATH_GPG_ERROR ([MINIMUM-VERSION], [ACTION-IF-FOUND],
[ACTION-IF-NOT-FOUND])
Check whether Libgpg-error (at least version MINIMUM-VERSION, if
given) exists on the host system. If it is found, execute
ACTION-IF-FOUND, otherwise do ACTION-IF-NOT-FOUND, if given.

Additionally, the function defines 'GPG_ERROR_CFLAGS' to the flags
needed for compilation of the program to find the 'gpg-error.h'
header file, and 'GPG_ERROR_LIBS' to the linker flags needed to
link the program to the Libgpg-error library.

This macro searches for 'gpgrt-config' along the PATH.

You can use the defined Autoconf variables like this in your
'Makefile.am':

AM_CPPFLAGS = $(GPG_ERROR_CFLAGS)
LDADD = $(GPG_ERROR_LIBS)

File: gpgrt.info, Node: Initializing the library, Next: Multi-Threading, Prev: Building sources using Automake, Up: Preparation

2.4 Initializing the library
============================

Before the library can be used, it should initialize itself. This is
achieved by invoking the function 'gpgrt_check_version' described below.

Also, it is often desirable to check that the version of Libgpg-error
used is indeed one which fits all requirements. Even with binary
compatibility, new features may have been introduced, but due to problem
with the dynamic linker an old version may actually be used. So you may
want to check that the version is okay right after program startup.

-- Function: const char * gpgrt_check_version (const char *REQ_VERSION)

The function 'gpgrt_check_version' initializes some subsystems used
by Libgpg-error and must be invoked before any other function in
the library. *Note Multi-Threading::.

Furthermore, this function returns the version number of the
library. It can also verify that the version number is higher than
a certain required version number REQ_VERSION, if this value is not
a null pointer.

File: gpgrt.info, Node: Multi-Threading, Prev: Initializing the library, Up: Preparation

2.5 Multi-Threading
===================

TBD.

File: gpgrt.info, Node: Generalities, Next: Tools, Prev: Preparation, Up: Top

3 Generalities
**************

TBD. (Description of the error function may be taken from Libgcrypt.)

File: gpgrt.info, Node: Tools, Next: Library Copying, Prev: Generalities, Up: Top

4 Tools
*******

* Menu:

* gpg-error-config:: Print required compiler flags
* gpgrt-config:: Helper tool for querying installed libraries

File: gpgrt.info, Node: gpg-error-config, Next: gpgrt-config, Up: Tools

4.1 Print required compiler flags
=================================

'gpg-error-config' is a tool that is used to configure to determine the
compiler and linker flags that should be used to compile and link
programs that use Libgpg-error.

This tool is now obsolete. Instead, please use pkg-config with
gpg-error.pc for your new program, or use gpg-error.m4 which uses
gpgrt-config and gpg-error.pc internally.

'gpg-error-config' accepts the following options:

'--mt'
Provide output appropriate for multithreaded programs. '--mt' is
only useful when combined with other options, and must be the first
option if present.

'--version'
Print the currently installed version of Libgpg-error on the
standard output.

'--libs'
Print the linker flags that are necessary to link a program using
Libgpg-error.

'--cflags'
Print the compiler flags that are necessary to compile a program
using Libgpg-error.

'--prefix=PREFIX'
If specified, use PREFIX instead of the installation prefix that
Libgpg-error was built with when computing the output for the
'--cflags' and '--libs' options. This option is also used for the
exec prefix if '--exec-prefix' was not specified. This option must
be specified before any '--libs' or '--cflags' options.

'--exec-prefix=PREFIX'
If specified, use PREFIX instead of the installation exec prefix
that Libgpg-error was built with when computing the output for the
'--cflags' and '--libs' options. This option must be specified
before any '--libs' or '--cflags' options.

File: gpgrt.info, Node: gpgrt-config, Prev: gpg-error-config, Up: Tools

4.2 gpgrt-config - Helper tool for querying installed libraries.
================================================================

'gpgrt-config' is a script tool that is used by the autoconf macros
shipped with gnupg software (e.g. AM_PATH_GPG_ERROR and AM_PATH_GPGME)
to determine the compiler and linker flags that should be used to
compile and link programs that use the specific library (e.g.
libgpg-error or libgpgme). 'gpgrt-config' uses pkg-config .pc files as
data source.

Apart from options 'gpgrt-config' accepts a single argument 'module'
specifying the basename (without the ".pc"-suffix) of the pkg-config
file to be used as input. 'module' will default to 'gpg-error' if it is
not specified.

'gpgrt-config' accepts the following options:

'--libdir=LIBDIR'
Parent directory path of pkgconfig file search path. e.g.
'gpgrt-config --libdir=/usr/lib --exists gpgme' will parse
'/usr/lib/pkgconfig/gpgme.pc'.

'--exists'
Test whether the pkg-config file 'module.pc' exist and exits with
success or error accordingly.

'--modversion'
Print the currently installed version of 'module' on the standard
output.

'--libs'
Print the linker flags that are necessary to link a program using
the 'module'.

'--cflags'
Print the compiler flags that are necessary to compile a program
using the 'module'.

'--static'
Modifies output if linking statically instead of dynamically.

'--variable=VARNAME'
Output variable VARNAME from the module's pkg-config file.

'gpgrt-config' is tried to be compatible to pkg-config, and to support
cross build well, but it is not intended to be a replacement.

File: gpgrt.info, Node: Library Copying, Next: Copying, Prev: Tools, Up: Top

GNU Lesser General Public License
*********************************

Version 2.1, February 1999

Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.

[This is the first released version of the Lesser GPL. It also counts
as the successor of the GNU Library Public License, version 2, hence the
version number 2.1.]

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agreement or otherwise) that contradict the conditions of this
License, they do not excuse you from the conditions of this
License. If you cannot distribute so as to satisfy simultaneously
your obligations under this License and any other pertinent
obligations, then as a consequence you may not distribute the
Library at all. For example, if a patent license would not permit
royalty-free redistribution of the Library by all those who receive
copies directly or indirectly through you, then the only way you
could satisfy both it and this License would be to refrain entirely
from distribution of the Library.

If any portion of this section is held invalid or unenforceable
under any particular circumstance, the balance of the section is
intended to apply, and the section as a whole is intended to apply
in other circumstances.

It is not the purpose of this section to induce you to infringe any
patents or other property right claims or to contest validity of
any such claims; this section has the sole purpose of protecting
the integrity of the free software distribution system which is
implemented by public license practices. Many people have made
generous contributions to the wide range of software distributed
through that system in reliance on consistent application of that
system; it is up to the author/donor to decide if he or she is
willing to distribute software through any other system and a
licensee cannot impose that choice.

This section is intended to make thoroughly clear what is believed
to be a consequence of the rest of this License.

12. If the distribution and/or use of the Library is restricted in
certain countries either by patents or by copyrighted interfaces,
the original copyright holder who places the Library under this
License may add an explicit geographical distribution limitation
excluding those countries, so that distribution is permitted only
in or among countries not thus excluded. In such case, this
License incorporates the limitation as if written in the body of
this License.

13. The Free Software Foundation may publish revised and/or new
versions of the Lesser General Public License from time to time.
Such new versions will be similar in spirit to the present version,
but may differ in detail to address new problems or concerns.

Each version is given a distinguishing version number. If the
Library specifies a version number of this License which applies to
it and "any later version", you have the option of following the
terms and conditions either of that version or of any later version
published by the Free Software Foundation. If the Library does not
specify a license version number, you may choose any version ever
published by the Free Software Foundation.

14. If you wish to incorporate parts of the Library into other free
programs whose distribution conditions are incompatible with these,
write to the author to ask for permission. For software which is
copyrighted by the Free Software Foundation, write to the Free
Software Foundation; we sometimes make exceptions for this. Our
decision will be guided by the two goals of preserving the free
status of all derivatives of our free software and of promoting the
sharing and reuse of software generally.

NO WARRANTY

15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE
LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS
AND/OR OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
PERFORMANCE OF THE LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE
DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR
OR CORRECTION.

16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY
MODIFY AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE
LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL,
INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR
INABILITY TO USE THE LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU
OR THIRD PARTIES OR A FAILURE OF THE LIBRARY TO OPERATE WITH ANY
OTHER SOFTWARE), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

END OF TERMS AND CONDITIONS

How to Apply These Terms to Your New Libraries
==============================================

If you develop a new library, and you want it to be of the greatest
possible use to the public, we recommend making it free software that
everyone can redistribute and change. You can do so by permitting
redistribution under these terms (or, alternatively, under the terms of
the ordinary General Public License).

To apply these terms, attach the following notices to the library.
It is safest to attach them to the start of each source file to most
effectively convey the exclusion of warranty; and each file should have
at least the "copyright" line and a pointer to where the full notice is
found.

ONE LINE TO GIVE THE LIBRARY'S NAME AND AN IDEA OF WHAT IT DOES.
Copyright (C) YEAR NAME OF AUTHOR

This 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.

This 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 this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307,
USA.

Also add information on how to contact you by electronic and paper
mail.

You should also get your employer (if you work as a programmer) or
your school, if any, to sign a "copyright disclaimer" for the library,
if necessary. Here is a sample; alter the names:

Yoyodyne, Inc., hereby disclaims all copyright interest in the library
`Frob' (a library for tweaking knobs) written by James Random Hacker.

SIGNATURE OF TY COON, 1 April 1990
Ty Coon, President of Vice

That's all there is to it!

File: gpgrt.info, Node: Copying, Next: Concept Index, Prev: Library Copying, Up: Top

GNU General Public License
**************************

Version 2, June 1991

Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.

Preamble
========

The licenses for most software are designed to take away your freedom to
share and change it. By contrast, the GNU General Public License is
intended to guarantee your freedom to share and change free software--to
make sure the software is free for all its users. This General Public
License applies to most of the Free Software Foundation's software and
to any other program whose authors commit to using it. (Some other Free
Software Foundation software is covered by the GNU Library General
Public License instead.) You can apply it to your programs, too.

When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
this service if you wish), that you receive source code or can get it if
you want it, that you can change the software or use pieces of it in new
free programs; and that you know you can do these things.

To protect your rights, we need to make restrictions that forbid
anyone to deny you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you if you
distribute copies of the software, or if you modify it.

For example, if you distribute copies of such a program, whether
gratis or for a fee, you must give the recipients all the rights that
you have. You must make sure that they, too, receive or can get the
source code. And you must show them these terms so they know their
rights.

We protect your rights with two steps: (1) copyright the software,
and (2) offer you this license which gives you legal permission to copy,
distribute and/or modify the software.

Also, for each author's protection and ours, we want to make certain
that everyone understands that there is no warranty for this free
software. If the software is modified by someone else and passed on, we
want its recipients to know that what they have is not the original, so
that any problems introduced by others will not reflect on the original
authors' reputations.

Finally, any free program is threatened constantly by software
patents. We wish to avoid the danger that redistributors of a free
program will individually obtain patent licenses, in effect making the
program proprietary. To prevent this, we have made it clear that any
patent must be licensed for everyone's free use or not licensed at all.

The precise terms and conditions for copying, distribution and
modification follow.

TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

1. This License applies to any program or other work which contains a
notice placed by the copyright holder saying it may be distributed
under the terms of this General Public License. The "Program",
below, refers to any such program or work, and a "work based on the
Program" means either the Program or any derivative work under
copyright law: that is to say, a work containing the Program or a
portion of it, either verbatim or with modifications and/or
translated into another language. (Hereinafter, translation is
included without limitation in the term "modification".) Each
licensee is addressed as "you".

Activities other than copying, distribution and modification are
not covered by this License; they are outside its scope. The act
of running the Program is not restricted, and the output from the
Program is covered only if its contents constitute a work based on
the Program (independent of having been made by running the
Program). Whether that is true depends on what the Program does.

2. You may copy and distribute verbatim copies of the Program's source
code as you receive it, in any medium, provided that you
conspicuously and appropriately publish on each copy an appropriate
copyright notice and disclaimer of warranty; keep intact all the
notices that refer to this License and to the absence of any
warranty; and give any other recipients of the Program a copy of
this License along with the Program.

You may charge a fee for the physical act of transferring a copy,
and you may at your option offer warranty protection in exchange
for a fee.

3. You may modify your copy or copies of the Program or any portion of
it, thus forming a work based on the Program, and copy and
distribute such modifications or work under the terms of Section 1
above, provided that you also meet all of these conditions:

a. You must cause the modified files to carry prominent notices
stating that you changed the files and the date of any change.

b. You must cause any work that you distribute or publish, that
in whole or in part contains or is derived from the Program or
any part thereof, to be licensed as a whole at no charge to
all third parties under the terms of this License.

c. If the modified program normally reads commands interactively
when run, you must cause it, when started running for such
interactive use in the most ordinary way, to print or display
an announcement including an appropriate copyright notice and
a notice that there is no warranty (or else, saying that you
provide a warranty) and that users may redistribute the
program under these conditions, and telling the user how to
view a copy of this License. (Exception: if the Program
itself is interactive but does not normally print such an
announcement, your work based on the Program is not required
to print an announcement.)

These requirements apply to the modified work as a whole. If
identifiable sections of that work are not derived from the
Program, and can be reasonably considered independent and separate
works in themselves, then this License, and its terms, do not apply
to those sections when you distribute them as separate works. But
when you distribute the same sections as part of a whole which is a
work based on the Program, the distribution of the whole must be on
the terms of this License, whose permissions for other licensees
extend to the entire whole, and thus to each and every part
regardless of who wrote it.

In addition, mere aggregation of another work not based on the
Program with the Program (or with a work based on the Program) on a
volume of a storage or distribution medium does not bring the other
work under the scope of this License.

4. You may copy and distribute the Program (or a work based on it,
under Section 2) in object code or executable form under the terms
of Sections 1 and 2 above provided that you also do one of the
following:

a. Accompany it with the complete corresponding machine-readable
source code, which must be distributed under the terms of
Sections 1 and 2 above on a medium customarily used for
software interchange; or,

b. Accompany it with a written offer, valid for at least three
years, to give any third party, for a charge no more than your
cost of physically performing source distribution, a complete
machine-readable copy of the corresponding source code, to be
distributed under the terms of Sections 1 and 2 above on a
medium customarily used for software interchange; or,

c. Accompany it with the information you received as to the offer
to distribute corresponding source code. (This alternative is
allowed only for noncommercial distribution and only if you
received the program in object code or executable form with
such an offer, in accord with Subsection b above.)

The source code for a work means the preferred form of the work for
making modifications to it. For an executable work, complete
source code means all the source code for all modules it contains,
plus any associated interface definition files, plus the scripts
used to control compilation and installation of the executable.
However, as a special exception, the source code distributed need
not include anything that is normally distributed (in either source
or binary form) with the major components (compiler, kernel, and so
on) of the operating system on which the executable runs, unless
that component itself accompanies the executable.

If distribution of executable or object code is made by offering
access to copy from a designated place, then offering equivalent
access to copy the source code from the same place counts as
distribution of the source code, even though third parties are not
compelled to copy the source along with the object code.

5. You may not copy, modify, sublicense, or distribute the Program
except as expressly provided under this License. Any attempt
otherwise to copy, modify, sublicense or distribute the Program is
void, and will automatically terminate your rights under this
License. However, parties who have received copies, or rights,
from you under this License will not have their licenses terminated
so long as such parties remain in full compliance.

6. You are not required to accept this License, since you have not
signed it. However, nothing else grants you permission to modify
or distribute the Program or its derivative works. These actions
are prohibited by law if you do not accept this License.
Therefore, by modifying or distributing the Program (or any work
based on the Program), you indicate your acceptance of this License
to do so, and all its terms and conditions for copying,
distributing or modifying the Program or works based on it.

7. Each time you redistribute the Program (or any work based on the
Program), the recipient automatically receives a license from the
original licensor to copy, distribute or modify the Program subject
to these terms and conditions. You may not impose any further
restrictions on the recipients' exercise of the rights granted
herein. You are not responsible for enforcing compliance by third
parties to this License.

8. If, as a consequence of a court judgment or allegation of patent
infringement or for any other reason (not limited to patent
issues), conditions are imposed on you (whether by court order,
agreement or otherwise) that contradict the conditions of this
License, they do not excuse you from the conditions of this
License. If you cannot distribute so as to satisfy simultaneously
your obligations under this License and any other pertinent
obligations, then as a consequence you may not distribute the
Program at all. For example, if a patent license would not permit
royalty-free redistribution of the Program by all those who receive
copies directly or indirectly through you, then the only way you
could satisfy both it and this License would be to refrain entirely
from distribution of the Program.

If any portion of this section is held invalid or unenforceable
under any particular circumstance, the balance of the section is
intended to apply and the section as a whole is intended to apply
in other circumstances.

It is not the purpose of this section to induce you to infringe any
patents or other property right claims or to contest validity of
any such claims; this section has the sole purpose of protecting
the integrity of the free software distribution system, which is
implemented by public license practices. Many people have made
generous contributions to the wide range of software distributed
through that system in reliance on consistent application of that
system; it is up to the author/donor to decide if he or she is
willing to distribute software through any other system and a
licensee cannot impose that choice.

This section is intended to make thoroughly clear what is believed
to be a consequence of the rest of this License.

9. If the distribution and/or use of the Program is restricted in
certain countries either by patents or by copyrighted interfaces,
the original copyright holder who places the Program under this
License may add an explicit geographical distribution limitation
excluding those countries, so that distribution is permitted only
in or among countries not thus excluded. In such case, this
License incorporates the limitation as if written in the body of
this License.

10. The Free Software Foundation may publish revised and/or new
versions of the General Public License from time to time. Such new
versions will be similar in spirit to the present version, but may
differ in detail to address new problems or concerns.

Each version is given a distinguishing version number. If the
Program specifies a version number of this License which applies to
it and "any later version", you have the option of following the
terms and conditions either of that version or of any later version
published by the Free Software Foundation. If the Program does not
specify a version number of this License, you may choose any
version ever published by the Free Software Foundation.

11. If you wish to incorporate parts of the Program into other free
programs whose distribution conditions are different, write to the
author to ask for permission. For software which is copyrighted by
the Free Software Foundation, write to the Free Software
Foundation; we sometimes make exceptions for this. Our decision
will be guided by the two goals of preserving the free status of
all derivatives of our free software and of promoting the sharing
and reuse of software generally.

NO WARRANTY

12. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO
WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE
LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS
AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE
DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR
OR CORRECTION.

13. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY
MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE
LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL,
INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR
INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU
OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY
OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

END OF TERMS AND CONDITIONS

How to Apply These Terms to Your New Programs
=============================================

If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these
terms.

To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least the
"copyright" line and a pointer to where the full notice is found.

ONE LINE TO GIVE THE PROGRAM'S NAME AND AN IDEA OF WHAT IT DOES.
Copyright (C) 19YY NAME OF AUTHOR

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.

Also add information on how to contact you by electronic and paper
mail.

If the program is interactive, make it output a short notice like
this when it starts in an interactive mode:

Gnomovision version 69, Copyright (C) 19YY NAME OF AUTHOR
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details
type `show w'. This is free software, and you are welcome
to redistribute it under certain conditions; type `show c'
for details.

The hypothetical commands 'show w' and 'show c' should show the
appropriate parts of the General Public License. Of course, the
commands you use may be called something other than 'show w' and 'show
c'; they could even be mouse-clicks or menu items--whatever suits your
program.

You should also get your employer (if you work as a programmer) or
your school, if any, to sign a "copyright disclaimer" for the program,
if necessary. Here is a sample; alter the names:

Yoyodyne, Inc., hereby disclaims all copyright
interest in the program `Gnomovision'
(which makes passes at compilers) written
by James Hacker.

SIGNATURE OF TY COON, 1 April 1989
Ty Coon, President of Vice

This General Public License does not permit incorporating your
program into proprietary programs. If your program is a subroutine
library, you may consider it more useful to permit linking proprietary
applications with the library. If this is what you want to do, use the
GNU Library General Public License instead of this License.

File: gpgrt.info, Node: Concept Index, Next: Function and Data Index, Prev: Copying, Up: Top

Concept Index
*************

[index]
* Menu:

* GPL, GNU General Public License: Copying. (line 6)
* LGPL, GNU Lesser General Public License: Library Copying. (line 6)

File: gpgrt.info, Node: Function and Data Index, Prev: Concept Index, Up: Top

Function and Data Index
***********************

[index]
* Menu:

* AM_PATH_GPG_ERROR: Building sources using Automake.
(line 12)
* gpgrt_check_version: Initializing the library.
(line 15)

Tag Table:
Node: Top736
Node: Introduction2117
Node: Getting Started2639
Node: Features2996
Node: Overview3125
Node: Preparation3321
Node: Header4122
Node: Building sources5201
Node: Building sources using Automake7399
Node: Initializing the library8701
Node: Multi-Threading9889
Node: Generalities10031
Node: Tools10218
Node: gpg-error-config10453
Node: gpgrt-config12127
Node: Library Copying13874
Node: Copying41975
Node: Concept Index61145
Node: Function and Data Index61442

End Tag Table

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