serval-dna/lang.h
Andrew Bettison 1efe6686fc Use config.h instead of -DHAVE_FOO=1
swiftc(1) requires every -D option to be prefixed with -Xcc, which
is not easy to achieve using autoconf.

Now instead of setting configuration macros like HAVE_LSEEK64 on the
command line using -D, they are defined in config.h, which is generated
by ./configure, ignored by Git, and included by all headers and source
files that use any configuration macro.

The dependency on Makefile has been replaced with a dependency on
Makefile.in and config.h, which helps avoid some redundant full
recompiles after running ./configure, because the configure script
does not overwrit config.h if its content does not change.
2016-10-19 16:27:20 +10:30

70 lines
1.9 KiB
C

/*
Copyright (C) 2015 Serval Project Inc.
Copyright (C) 2016 Flinders University
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef __SERVAL_DNA__LANG_H
#define __SERVAL_DNA__LANG_H
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
/* Useful macros not specific to Serval DNA that assist with using the C
* language.
*/
// Number of elements in an array (Warning: does not work if A is a pointer!).
#define NELS(A) (sizeof (A) / sizeof *(A))
// Support for various GCC attributes.
#ifdef HAVE_FUNC_ATTRIBUTE_ERROR
# define __ATTRIBUTE_error(m) __error__(m)
#else
# define __ATTRIBUTE_error(m)
#endif
#ifdef HAVE_FUNC_ATTRIBUTE_FORMAT
# define __ATTRIBUTE_format(a,b,c) __format__(a,b,c)
#else
# define __ATTRIBUTE_format(a,b,c)
#endif
#ifdef HAVE_FUNC_ATTRIBUTE_MALLOC
# define __ATTRIBUTE_malloc __malloc__
#else
# define __ATTRIBUTE_malloc
#endif
#ifdef HAVE_FUNC_ATTRIBUTE_ALLOC_SIZE
# define __ATTRIBUTE_alloc_size(n) __alloc_size__(n)
#else
# define __ATTRIBUTE_alloc_size(n)
#endif
// To suppress the "unused parameter" warning from -Wunused-parameter.
#ifdef HAVE_FUNC_ATTRIBUTE_UNUSED
# define __ATTRIBUTE_unused __unused__
# define UNUSED(x) x __attribute__((__unused__))
#else
# define __ATTRIBUTE_unused
# define UNUSED(x) x
#endif
#endif // __SERVAL_DNA__LANG_H