IO-AIO/configure.ac

AC_INIT
AC_CONFIG_SRCDIR([libeio/eio.h])
AC_CONFIG_HEADERS([config.h])

AC_PREREQ(2.60)
AC_USE_SYSTEM_EXTENSIONS

AC_PROG_CC

m4_include([libeio/libeio.m4])

# for these to work, you need to run autoheader in IO::AIO, not libeio :(

AC_CACHE_CHECK(for set/getrlimit, ac_cv_rlimits, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
#include <sys/time.h>
#include <sys/resource.h>
int main (void)
{
   struct rlimit srl;
   int res;
   srl.rlim_cur = srl.rlim_max = RLIM_INFINITY;
   res = getrlimit (RLIMIT_NOFILE, &srl);
   res = setrlimit (RLIMIT_NOFILE, &srl);
   return 0;
}
]])],ac_cv_rlimits=yes,ac_cv_rlimits=no)])
test $ac_cv_rlimits = yes && AC_DEFINE(HAVE_RLIMITS, 1, setrlimit/getrlimit is available)

dnl at least uclibc defines _POSIX_ADVISORY_INFO without *any* of the required
dnl functionality actually being present. ugh.
AC_CACHE_CHECK(for posix_madvise, ac_cv_posix_madvise, [AC_LINK_IFELSE([AC_LANG_SOURCE([
#include <sys/mman.h>
int main (void)
{
   int res = posix_madvise ((void *)0, (size_t)0, POSIX_MADV_NORMAL);
   int a = POSIX_MADV_SEQUENTIAL;
   int b = POSIX_MADV_RANDOM;
   int c = POSIX_MADV_WILLNEED;
   int d = POSIX_MADV_DONTNEED;
   return 0;
}
])],ac_cv_posix_madvise=yes,ac_cv_posix_madvise=no)])
test $ac_cv_posix_madvise = yes && AC_DEFINE(HAVE_POSIX_MADVISE, 1, posix_madvise(2) is available)

AC_CACHE_CHECK(for posix_fadvise, ac_cv_posix_fadvise, [AC_LINK_IFELSE([AC_LANG_SOURCE([
#define _XOPEN_SOURCE 600
#include <fcntl.h>
int main (void)
{
   int res = posix_fadvise ((int)0, (off_t)0, (off_t)0, POSIX_FADV_NORMAL);
   int a = POSIX_FADV_SEQUENTIAL;
   int b = POSIX_FADV_NOREUSE;
   int c = POSIX_FADV_RANDOM;
   int d = POSIX_FADV_WILLNEED;
   int e = POSIX_FADV_DONTNEED;
   return 0;
}
])],ac_cv_posix_fadvise=yes,ac_cv_posix_fadvise=no)])
test $ac_cv_posix_fadvise = yes && AC_DEFINE(HAVE_POSIX_FADVISE, 1, posix_fadvise(2) is available)

dnl lots of linux specifics
AC_CHECK_HEADERS([linux/fs.h linux/fiemap.h])

dnl glibc major/minor macros
AC_CHECK_HEADERS([sys/sysmacros.h])

dnl solaris major/minor
AC_CHECK_HEADERS([sys/mkdev.h])

dnl readv / preadv, vmsplice
AC_CHECK_HEADERS([sys/uio.h])


AC_CACHE_CHECK([for splice, vmsplice and tee], ac_cv_linux_splice, [AC_LINK_IFELSE([AC_LANG_SOURCE([
#include <sys/types.h>
#include <fcntl.h>
#include <sys/uio.h>
int main (void)
{
   ssize_t res;
   res = splice ((int)0, (loff_t)0, (int)0, (loff_t *)0, (size_t)0, SPLICE_F_MOVE | SPLICE_F_NONBLOCK | SPLICE_F_MORE);
   res = tee ((int)0, (int)0, (size_t)0, SPLICE_F_NONBLOCK);
   res = vmsplice ((int)0, (struct iovec *)0, 0, SPLICE_F_NONBLOCK | SPLICE_F_GIFT);
   return 0;
}
])],ac_cv_linux_splice=yes,ac_cv_linux_splice=no)])
test $ac_cv_linux_splice = yes && AC_DEFINE(HAVE_LINUX_SPLICE, 1, splice/vmsplice/tee(2) are available)

AC_CACHE_CHECK(for pipe2, ac_cv_pipe2, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
#include <fcntl.h>
#include <unistd.h>
int main (void)
{
   int res;
   res = pipe2 (0, 0);
   return 0;
}
]])],ac_cv_pipe2=yes,ac_cv_pipe2=no)])
test $ac_cv_pipe2 = yes && AC_DEFINE(HAVE_PIPE2, 1, pipe2(2) is available)

AC_CACHE_CHECK(for eventfd, ac_cv_eventfd, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
#include <sys/eventfd.h>
int main (void)
{
   int res;
   res = eventfd (1, EFD_CLOEXEC | EFD_NONBLOCK);
   return 0;
}
]])],ac_cv_eventfd=yes,ac_cv_eventfd=no)])
test $ac_cv_eventfd = yes && AC_DEFINE(HAVE_EVENTFD, 1, eventfd(2) is available)

AC_CACHE_CHECK(for timerfd_*, ac_cv_timerfd, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
#include <sys/timerfd.h>
int main (void)
{
   struct itimerspec its;
   int res;
   res = timerfd_create (CLOCK_REALTIME, TFD_CLOEXEC | TFD_NONBLOCK);
   res = timerfd_settime (res, TFD_TIMER_ABSTIME /*| TFD_TIMER_CANCEL_ON_SET*/, &its, 0);
   res = timerfd_gettime (res, &its);
   return 0;
}
]])],ac_cv_timerfd=yes,ac_cv_timerfd=no)])
test $ac_cv_timerfd = yes && AC_DEFINE(HAVE_TIMERFD, 1, timerfd_*(2) are available)

AC_CACHE_CHECK(for memfd_create, ac_cv_memfd_create, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
#include <sys/mman.h>
int main (void)
{
   int res = memfd_create ("name", MFD_CLOEXEC | MFD_ALLOW_SEALING);
   return 0;
}
]])],ac_cv_memfd_create=yes,ac_cv_memfd_create=no)])
test $ac_cv_memfd_create = yes && AC_DEFINE(HAVE_MEMFD_CREATE, 1, memfd_create(2) is available)

AC_CACHE_CHECK(for copy_file_range, ac_cv_copy_file_range, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
#include <unistd.h>
#include <sys/syscall.h>
/*#include <linux/copy.h>*/
int main (void)
{
   int res;
   /*res = syscall (SYS_copy_file_range, 0, 0, 0, 0, 0, COPY_FR_REFLINK | COPY_FR_DEDUP | COPY_FR_COPY);*/
   res = syscall (SYS_copy_file_range, 0, 0, 0, 0, 0, 0);
   return 0;
}
]])],ac_cv_copy_file_range=yes,ac_cv_copy_file_range=no)])
test $ac_cv_copy_file_range = yes && AC_DEFINE(HAVE_COPY_FILE_RANGE, 1, copy_file_range(2) is available)

AC_CACHE_CHECK(for st_xtimensec, ac_cv_xtimensec, [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

int main (void)
{
   return PL_statcache.st_atimensec
        + PL_statcache.st_mtimensec
        + PL_statcache.st_ctimensec;
}
]])],ac_cv_xtimensec=yes,ac_cv_xtimensec=no)])
test $ac_cv_xtimensec = yes && AC_DEFINE(HAVE_ST_XTIMENSEC, 1, stat nanosecond access by st_xtimensec)

AC_CACHE_CHECK(for st_xtimespec, ac_cv_xtimespec, [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

int main (void)
{
   return PL_statcache.st_atim.tv_nsec
        + PL_statcache.st_mtim.tv_nsec
        + PL_statcache.st_ctim.tv_nsec;
}
]])],ac_cv_xtimespec=yes,ac_cv_xtimespec=no)])
test $ac_cv_xtimespec = yes && AC_DEFINE(HAVE_ST_XTIMESPEC, 1, stat nanosecond access by st_xtimespec)

# apparently, True64 uses st_u[amc]time, aix uses at_[amc]time_n and apple uses st_[amc,birth]timespec?

AC_CACHE_CHECK(for st_birthtimensec, ac_cv_birthtimensec, [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

int main (void)
{
   return PL_statcache.st_birthtime + PL_statcache.st_birthtimensec;
}
]])],ac_cv_birthtimensec=yes,ac_cv_birthtimensec=no)])
test $ac_cv_birthtimensec = yes && AC_DEFINE(HAVE_ST_BIRTHTIMENSEC, 1, birthtime nanosecond access by st_birthtimensec)

AC_CACHE_CHECK(for st_birthtimespec, ac_cv_birthtimespec, [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

int main (void)
{
   return PL_statcache.st_birthtim.tv_sec + PL_statcache.st_birthtim.tv_nsec;
}
]])],ac_cv_birthtimespec=yes,ac_cv_birthtimespec=no)])
test $ac_cv_birthtimespec = yes && AC_DEFINE(HAVE_ST_BIRTHTIMESPEC, 1, birthtime nanosecond access by st_birthtimespec)

AC_CACHE_CHECK(for st_gen, ac_cv_st_gen, [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

int main (void)
{
   return PL_statcache.st_gen;
}
]])],ac_cv_st_gen=yes,ac_cv_st_gen=no)])
test $ac_cv_st_gen = yes && AC_DEFINE(HAVE_ST_GEN, 1, stat st_gen member)

AC_CACHE_CHECK(for statx, ac_cv_statx, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
int res;
int main (void)
{
   struct statx sx;
   int res;
   res = statx (AT_FDCWD, ".",
         AT_EMPTY_PATH | AT_NO_AUTOMOUNT | AT_SYMLINK_NOFOLLOW | AT_STATX_SYNC_AS_STAT | AT_STATX_FORCE_SYNC | AT_STATX_DONT_SYNC,
         STATX_ALL, &sx);
   STATX_TYPE; STATX_MODE; STATX_NLINK; STATX_UID; STATX_GID; STATX_ATIME; STATX_MTIME; STATX_CTIME;
   STATX_INO; STATX_SIZE; STATX_BLOCKS; STATX_BASIC_STATS; STATX_BTIME; STATX_ALL;
   STATX_ATTR_COMPRESSED; STATX_ATTR_IMMUTABLE; STATX_ATTR_APPEND; STATX_ATTR_NODUMP; STATX_ATTR_ENCRYPTED;
   return 0;
}
]])],ac_cv_statx=yes,ac_cv_statx=no)])
test $ac_cv_statx = yes && AC_DEFINE(HAVE_STATX, 1, statx(2) is available)

AC_CACHE_CHECK(for accept4, ac_cv_accept4, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
#include <sys/types.h>
#include <sys/socket.h>
int main (void)
{
   int res;
   res = accept4 (1, (struct sockaddr *)0, (socklen_t)0, SOCK_NONBLOCK | SOCK_CLOEXEC);
   return 0;
}
]])],ac_cv_accept4=yes,ac_cv_accept4=no)])
test $ac_cv_accept4 = yes && AC_DEFINE(HAVE_ACCEPT4, 1, accept4(2) is available)

AC_OUTPUT

Revision:	1.15
Committed:	Fri Sep 6 22:03:09 2019 UTC (4 years, 8 months ago) by root
Branch:	MAIN
CVS Tags:	rel-4_73
Changes since 1.14:	+12 -0 lines
Log Message:	* empty log message *
#	Content
1	AC_INIT
2	AC_CONFIG_SRCDIR([libeio/eio.h])
3	AC_CONFIG_HEADERS([config.h])
4
5	AC_PREREQ(2.60)
6	AC_USE_SYSTEM_EXTENSIONS
7
8	AC_PROG_CC
9
10	m4_include([libeio/libeio.m4])
11
12	# for these to work, you need to run autoheader in IO::AIO, not libeio :(
13
14	AC_CACHE_CHECK(for set/getrlimit, ac_cv_rlimits, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
15	#include <sys/time.h>
16	#include <sys/resource.h>
17	int main (void)
18	{
19	struct rlimit srl;
20	int res;
21	srl.rlim_cur = srl.rlim_max = RLIM_INFINITY;
22	res = getrlimit (RLIMIT_NOFILE, &srl);
23	res = setrlimit (RLIMIT_NOFILE, &srl);
24	return 0;
25	}
26	]])],ac_cv_rlimits=yes,ac_cv_rlimits=no)])
27	test $ac_cv_rlimits = yes && AC_DEFINE(HAVE_RLIMITS, 1, setrlimit/getrlimit is available)
28
29	dnl at least uclibc defines _POSIX_ADVISORY_INFO without any of the required
30	dnl functionality actually being present. ugh.
31	AC_CACHE_CHECK(for posix_madvise, ac_cv_posix_madvise, [AC_LINK_IFELSE([AC_LANG_SOURCE([
32	#include <sys/mman.h>
33	int main (void)
34	{
35	int res = posix_madvise ((void *)0, (size_t)0, POSIX_MADV_NORMAL);
36	int a = POSIX_MADV_SEQUENTIAL;
37	int b = POSIX_MADV_RANDOM;
38	int c = POSIX_MADV_WILLNEED;
39	int d = POSIX_MADV_DONTNEED;
40	return 0;
41	}
42	])],ac_cv_posix_madvise=yes,ac_cv_posix_madvise=no)])
43	test $ac_cv_posix_madvise = yes && AC_DEFINE(HAVE_POSIX_MADVISE, 1, posix_madvise(2) is available)
44
45	AC_CACHE_CHECK(for posix_fadvise, ac_cv_posix_fadvise, [AC_LINK_IFELSE([AC_LANG_SOURCE([
46	#define _XOPEN_SOURCE 600
47	#include <fcntl.h>
48	int main (void)
49	{
50	int res = posix_fadvise ((int)0, (off_t)0, (off_t)0, POSIX_FADV_NORMAL);
51	int a = POSIX_FADV_SEQUENTIAL;
52	int b = POSIX_FADV_NOREUSE;
53	int c = POSIX_FADV_RANDOM;
54	int d = POSIX_FADV_WILLNEED;
55	int e = POSIX_FADV_DONTNEED;
56	return 0;
57	}
58	])],ac_cv_posix_fadvise=yes,ac_cv_posix_fadvise=no)])
59	test $ac_cv_posix_fadvise = yes && AC_DEFINE(HAVE_POSIX_FADVISE, 1, posix_fadvise(2) is available)
60
61	dnl lots of linux specifics
62	AC_CHECK_HEADERS([linux/fs.h linux/fiemap.h])
63
64	dnl glibc major/minor macros
65	AC_CHECK_HEADERS([sys/sysmacros.h])
66
67	dnl solaris major/minor
68	AC_CHECK_HEADERS([sys/mkdev.h])
69
70	dnl readv / preadv, vmsplice
71	AC_CHECK_HEADERS([sys/uio.h])
72
73
74	AC_CACHE_CHECK([for splice, vmsplice and tee], ac_cv_linux_splice, [AC_LINK_IFELSE([AC_LANG_SOURCE([
75	#include <sys/types.h>
76	#include <fcntl.h>
77	#include <sys/uio.h>
78	int main (void)
79	{
80	ssize_t res;
81	res = splice ((int)0, (loff_t)0, (int)0, (loff_t *)0, (size_t)0, SPLICE_F_MOVE \| SPLICE_F_NONBLOCK \| SPLICE_F_MORE);
82	res = tee ((int)0, (int)0, (size_t)0, SPLICE_F_NONBLOCK);
83	res = vmsplice ((int)0, (struct iovec *)0, 0, SPLICE_F_NONBLOCK \| SPLICE_F_GIFT);
84	return 0;
85	}
86	])],ac_cv_linux_splice=yes,ac_cv_linux_splice=no)])
87	test $ac_cv_linux_splice = yes && AC_DEFINE(HAVE_LINUX_SPLICE, 1, splice/vmsplice/tee(2) are available)
88
89	AC_CACHE_CHECK(for pipe2, ac_cv_pipe2, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
90	#include <fcntl.h>
91	#include <unistd.h>
92	int main (void)
93	{
94	int res;
95	res = pipe2 (0, 0);
96	return 0;
97	}
98	]])],ac_cv_pipe2=yes,ac_cv_pipe2=no)])
99	test $ac_cv_pipe2 = yes && AC_DEFINE(HAVE_PIPE2, 1, pipe2(2) is available)
100
101	AC_CACHE_CHECK(for eventfd, ac_cv_eventfd, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
102	#include <sys/eventfd.h>
103	int main (void)
104	{
105	int res;
106	res = eventfd (1, EFD_CLOEXEC \| EFD_NONBLOCK);
107	return 0;
108	}
109	]])],ac_cv_eventfd=yes,ac_cv_eventfd=no)])
110	test $ac_cv_eventfd = yes && AC_DEFINE(HAVE_EVENTFD, 1, eventfd(2) is available)
111
112	AC_CACHE_CHECK(for timerfd_*, ac_cv_timerfd, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
113	#include <sys/timerfd.h>
114	int main (void)
115	{
116	struct itimerspec its;
117	int res;
118	res = timerfd_create (CLOCK_REALTIME, TFD_CLOEXEC \| TFD_NONBLOCK);
119	res = timerfd_settime (res, TFD_TIMER_ABSTIME /\| TFD_TIMER_CANCEL_ON_SET/, &its, 0);
120	res = timerfd_gettime (res, &its);
121	return 0;
122	}
123	]])],ac_cv_timerfd=yes,ac_cv_timerfd=no)])
124	test $ac_cv_timerfd = yes && AC_DEFINE(HAVE_TIMERFD, 1, timerfd_*(2) are available)
125
126	AC_CACHE_CHECK(for memfd_create, ac_cv_memfd_create, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
127	#include <sys/mman.h>
128	int main (void)
129	{
130	int res = memfd_create ("name", MFD_CLOEXEC \| MFD_ALLOW_SEALING);
131	return 0;
132	}
133	]])],ac_cv_memfd_create=yes,ac_cv_memfd_create=no)])
134	test $ac_cv_memfd_create = yes && AC_DEFINE(HAVE_MEMFD_CREATE, 1, memfd_create(2) is available)
135
136	AC_CACHE_CHECK(for copy_file_range, ac_cv_copy_file_range, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
137	#include <unistd.h>
138	#include <sys/syscall.h>
139	/#include <linux/copy.h>/
140	int main (void)
141	{
142	int res;
143	/res = syscall (SYS_copy_file_range, 0, 0, 0, 0, 0, COPY_FR_REFLINK \| COPY_FR_DEDUP \| COPY_FR_COPY);/
144	res = syscall (SYS_copy_file_range, 0, 0, 0, 0, 0, 0);
145	return 0;
146	}
147	]])],ac_cv_copy_file_range=yes,ac_cv_copy_file_range=no)])
148	test $ac_cv_copy_file_range = yes && AC_DEFINE(HAVE_COPY_FILE_RANGE, 1, copy_file_range(2) is available)
149
150	AC_CACHE_CHECK(for st_xtimensec, ac_cv_xtimensec, [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
151	#include "EXTERN.h"
152	#include "perl.h"
153	#include "XSUB.h"
154
155	int main (void)
156	{
157	return PL_statcache.st_atimensec
158	+ PL_statcache.st_mtimensec
159	+ PL_statcache.st_ctimensec;
160	}
161	]])],ac_cv_xtimensec=yes,ac_cv_xtimensec=no)])
162	test $ac_cv_xtimensec = yes && AC_DEFINE(HAVE_ST_XTIMENSEC, 1, stat nanosecond access by st_xtimensec)
163
164	AC_CACHE_CHECK(for st_xtimespec, ac_cv_xtimespec, [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
165	#include "EXTERN.h"
166	#include "perl.h"
167	#include "XSUB.h"
168
169	int main (void)
170	{
171	return PL_statcache.st_atim.tv_nsec
172	+ PL_statcache.st_mtim.tv_nsec
173	+ PL_statcache.st_ctim.tv_nsec;
174	}
175	]])],ac_cv_xtimespec=yes,ac_cv_xtimespec=no)])
176	test $ac_cv_xtimespec = yes && AC_DEFINE(HAVE_ST_XTIMESPEC, 1, stat nanosecond access by st_xtimespec)
177
178	# apparently, True64 uses st_u[amc]time, aix uses at_[amc]time_n and apple uses st_[amc,birth]timespec?
179
180	AC_CACHE_CHECK(for st_birthtimensec, ac_cv_birthtimensec, [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
181	#include "EXTERN.h"
182	#include "perl.h"
183	#include "XSUB.h"
184
185	int main (void)
186	{
187	return PL_statcache.st_birthtime + PL_statcache.st_birthtimensec;
188	}
189	]])],ac_cv_birthtimensec=yes,ac_cv_birthtimensec=no)])
190	test $ac_cv_birthtimensec = yes && AC_DEFINE(HAVE_ST_BIRTHTIMENSEC, 1, birthtime nanosecond access by st_birthtimensec)
191
192	AC_CACHE_CHECK(for st_birthtimespec, ac_cv_birthtimespec, [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
193	#include "EXTERN.h"
194	#include "perl.h"
195	#include "XSUB.h"
196
197	int main (void)
198	{
199	return PL_statcache.st_birthtim.tv_sec + PL_statcache.st_birthtim.tv_nsec;
200	}
201	]])],ac_cv_birthtimespec=yes,ac_cv_birthtimespec=no)])
202	test $ac_cv_birthtimespec = yes && AC_DEFINE(HAVE_ST_BIRTHTIMESPEC, 1, birthtime nanosecond access by st_birthtimespec)
203
204	AC_CACHE_CHECK(for st_gen, ac_cv_st_gen, [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
205	#include "EXTERN.h"
206	#include "perl.h"
207	#include "XSUB.h"
208
209	int main (void)
210	{
211	return PL_statcache.st_gen;
212	}
213	]])],ac_cv_st_gen=yes,ac_cv_st_gen=no)])
214	test $ac_cv_st_gen = yes && AC_DEFINE(HAVE_ST_GEN, 1, stat st_gen member)
215
216	AC_CACHE_CHECK(for statx, ac_cv_statx, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
217	#include <sys/types.h>
218	#include <sys/stat.h>
219	#include <unistd.h>
220	#include <fcntl.h>
221	int res;
222	int main (void)
223	{
224	struct statx sx;
225	int res;
226	res = statx (AT_FDCWD, ".",
227	AT_EMPTY_PATH \| AT_NO_AUTOMOUNT \| AT_SYMLINK_NOFOLLOW \| AT_STATX_SYNC_AS_STAT \| AT_STATX_FORCE_SYNC \| AT_STATX_DONT_SYNC,
228	STATX_ALL, &sx);
229	STATX_TYPE; STATX_MODE; STATX_NLINK; STATX_UID; STATX_GID; STATX_ATIME; STATX_MTIME; STATX_CTIME;
230	STATX_INO; STATX_SIZE; STATX_BLOCKS; STATX_BASIC_STATS; STATX_BTIME; STATX_ALL;
231	STATX_ATTR_COMPRESSED; STATX_ATTR_IMMUTABLE; STATX_ATTR_APPEND; STATX_ATTR_NODUMP; STATX_ATTR_ENCRYPTED;
232	return 0;
233	}
234	]])],ac_cv_statx=yes,ac_cv_statx=no)])
235	test $ac_cv_statx = yes && AC_DEFINE(HAVE_STATX, 1, statx(2) is available)
236
237	AC_CACHE_CHECK(for accept4, ac_cv_accept4, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
238	#include <sys/types.h>
239	#include <sys/socket.h>
240	int main (void)
241	{
242	int res;
243	res = accept4 (1, (struct sockaddr *)0, (socklen_t)0, SOCK_NONBLOCK \| SOCK_CLOEXEC);
244	return 0;
245	}
246	]])],ac_cv_accept4=yes,ac_cv_accept4=no)])
247	test $ac_cv_accept4 = yes && AC_DEFINE(HAVE_ACCEPT4, 1, accept4(2) is available)
248
249	AC_OUTPUT
250