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Autoconf Macro: ax_create_stdint_h
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<h1>
ax_create_stdint_h
</h1>
<h2>
SYNOPSIS
</h2>
<p class="indent" style="white-space:nowrap;">
<code>AX_CREATE_STDINT_H [( HEADER-TO-GENERATE [, HEDERS-TO-CHECK])]</code>
</p>
<h2>
DESCRIPTION
</h2>
<div class="indent">
<p>
the "ISO C9X: 7.18 Integer types <stdint.h>" section requires the
existence of an include file <stdint.h> that defines a set of
typedefs, especially uint8_t,int32_t,uintptr_t. Many older installations
will not provide this file, but some will have the very same definitions in
<inttypes.h>. In other enviroments we can use the inet-types in
<sys/types.h> which would define the typedefs int8_t and u_int8_t
respectivly.
</p>
<p>
This macros will create a local "_stdint.h" or the headerfile given as an
argument. In many cases that file will just "#include <stdint.h>" or
"#include <inttypes.h>", while in other environments it will provide
the set of basic 'stdint's definitions/typedefs:
</p>
<pre>
int8_t,uint8_t,int16_t,uint16_t,int32_t,uint32_t,intptr_t,uintptr_t
int_least32_t.. int_fast32_t.. intmax_t
</pre>
<p>
which may or may not rely on the definitions of other files, or using the
AC_CHECK_SIZEOF macro to determine the actual sizeof each type.
</p>
<p>
if your header files require the stdint-types you will want to create an
installable file mylib-int.h that all your other installable header may
include. So if you have a library package named "mylib", just use
</p>
<pre>
AX_CREATE_STDINT_H(mylib-int.h)
</pre>
<p>
in configure.ac and go to install that very header file in Makefile.am
along with the other headers (mylib.h) - and the mylib-specific headers can
simply use "#include <mylib-int.h>" to obtain the stdint-types.
</p>
<p>
Remember, if the system already had a valid <stdint.h>, the generated
file will include it directly. No need for fuzzy HAVE_STDINT_H things...
(oops, GCC 4.2.x has deliberatly disabled its stdint.h for non-c99
compilation and the c99-mode is not the default. Therefore this macro will
not use the compiler's stdint.h - please complain to the GCC developers).
</p>
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<h2>
SOURCE CODE
</h2>
<p class="indent">
<a href=
"http://autoconf-archive.cryp.to/ax_create_stdint_h.m4">http://autoconf-archive.cryp.to/ax_create_stdint_h.m4</a>
</p>
<h2>
LICENSE
</h2>
<div class="indent">
<p style="white-space:nowrap;">
Copyright © 2008 Guido U. Draheim <guidod@gmx.de>
</p>
<p>
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.
</p>
<p>
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.
</p>
<p>
You should have received a copy of the GNU General Public License along
with this program. If not, see <<a href=
"http://www.gnu.org/licenses/">http://www.gnu.org/licenses/</a>>.
</p>
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As a special exception, the respective Autoconf Macro's copyright owner
gives unlimited permission to copy, distribute and modify the configure
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use of the material that constitutes the Autoconf Macro.
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