(usage): Warn that the +N form will be withdrawn.
[coreutils.git] / m4 / check-decl.m4
blobb282bdebc7d7dfb50764b07767ec588779c6991b
1 #serial 17
3 dnl This is just a wrapper function to encapsulate this kludge.
4 dnl Putting it in a separate file like this helps share it between
5 dnl different packages.
6 AC_DEFUN(jm_CHECK_DECLS,
8   AC_REQUIRE([_jm_DECL_HEADERS])
9   AC_REQUIRE([AC_HEADER_TIME])
10   headers='
11 #include <stdio.h>
12 #if HAVE_STRING_H
13 # if !STDC_HEADERS && HAVE_MEMORY_H
14 #  include <memory.h>
15 # endif
16 # include <string.h>
17 #else
18 # if HAVE_STRINGS_H
19 #  include <strings.h>
20 # endif
21 #endif
22 #if HAVE_STDLIB_H
23 # include <stdlib.h>
24 #endif
25 #if HAVE_UNISTD_H
26 # include <unistd.h>
27 #endif
29 #include <sys/types.h>
30 #if TIME_WITH_SYS_TIME
31 # include <sys/time.h>
32 # include <time.h>
33 #else
34 # if HAVE_SYS_TIME_H
35 #  include <sys/time.h>
36 # else
37 #  include <time.h>
38 # endif
39 #endif
41 #if HAVE_UTMP_H
42 # include <utmp.h>
43 #endif
45 #if HAVE_GRP_H
46 # include <grp.h>
47 #endif
49 #if HAVE_PWD_H
50 # include <pwd.h>
51 #endif
54   AC_CHECK_DECLS([
55     free,
56     getenv,
57     geteuid,
58     getgrgid,
59     getlogin,
60     getpwuid,
61     getuid,
62     getutent,
63     lseek,
64     malloc,
65     memchr,
66     memrchr,
67     nanosleep,
68     realloc,
69     stpcpy,
70     strndup,
71     strnlen,
72     strstr,
73     strtoul,
74     strtoull,
75     ttyname], , , $headers)
78 dnl FIXME: when autoconf has support for it.
79 dnl This is a little helper so we can require these header checks.
80 AC_DEFUN(_jm_DECL_HEADERS,
82   AC_REQUIRE([AC_HEADER_STDC])
83   AC_CHECK_HEADERS(grp.h memory.h pwd.h string.h strings.h stdlib.h \
84                    unistd.h sys/time.h utmp.h utmpx.h)