.\"	$NetBSD$
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.\" Copyright (c) 2009-2010 by Aleksey Cheusov (vle@gmx.net)
.\" Absolutely no warranty.
.\"
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.TH MKC_CHECK_DECL 1 "Mar 15, 2009" "" ""
.SH NAME
mkc_check_decl \- checks for define, function, variable, type or
function prototype.
.SH SYNOPSIS
.BI mkc_check_decl " <check_type> <what> [includes...]"
.br
.BI mkc_check_decl " -h"
.SH DESCRIPTION
.I check_type
is either
.IR " define" , " variable" , " func[0-9]" , " type" , " member " or
.IR " prototype" .
Depending on its value
.B mkc_check_decl
checks for define, variable, function with specified number
of arguments, type or a member of structure 
in a specified header files
.I includes
by compiling a test program.
As a result it prints either 1 (success) or 0 (failure) to stdout.
.SH OPTIONS
.TP
.B "-h"
display help message
.SH ENVIRONMENT
.TP
.B CC
Compiler. By default
.I cc
is used.
.TP
.B CPPFLAGS, CFLAGS
Options passed to the compiler, for example -I for additional directories
that contain header files.
.TP
.B MKC_VERBOSE
If set to 1, verbose messages are output to stderr.
.TP
.B MKC_SHOW_CACHED
If set to 1 and MKC_VERBOSE is set to 1, cached results
are output to stderr.
.TP
.B MKC_COMMON_HEADERS
List of header files to add to .c test program.
.TP
.B MKC_CACHEDIR
Directory where temporary and cache files are created.
If unset they are created in a current directory.
.TP
.B MKC_NOCACHE
All results are cached unless MKC_NOCACHE variable is set
to 1.
.TP
.B MKC_DELETE_TMPFILES
If set to 1, temporary files are removed.
.SH EXAMPLES
.VS
   mkc_check_decl define __GNUC__
   mkc_check_decl define RTLD_LAZY dlfcn.h
   mkc_check_decl variable sys_errlist errno.h
   mkc_check_decl variable __malloc_hook malloc.h
   mkc_check_decl func3 poll poll.h
   mkc_check_decl func2 fgetln stdio.h
   mkc_check_decl type mbstate_t wchar.h
   mkc_check_decl type long-long
   mkc_check_decl member tm.tm_isdst time.h
   mkc_check_decl member ifreq.ifr_addr.sa_len net/if.h
   mkc_check_decl prototype 'int connect(int __fd, const struct sockaddr * __addr, socklen_t __len)' sys/socket.h
   mkc_check_decl prototype 'int connect(int __fd, struct sockaddr * __addr, socklen_t __len)' sys/socket.h
.VE
.SH AUTHOR
Aleksey Cheusov <vle@gmx.net>