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 unix-style syscall interface], ac_cv_syscall, [AC_LINK_IFELSE([AC_LANG_SOURCE([
#include <unistd.h>
#include <sys/syscall.h>
int main (void)
{
   long res = syscall (SYS_exit, 0);
   return 0;
}
])],ac_cv_syscall=yes,ac_cv_syscall=no)])
test $ac_cv_syscall = yes && AC_DEFINE(HAVE_SYSCALL, 1, unix syscall interface)

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:	1.16
Committed:	Tue Dec 29 15:16:28 2020 UTC (3 years, 4 months ago) by root
Branch:	MAIN
CVS Tags:	rel-4_74, rel-4_75
Changes since 1.15:	+10 -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	AC_CACHE_CHECK([for unix-style syscall interface], ac_cv_syscall, [AC_LINK_IFELSE([AC_LANG_SOURCE([
74	#include <unistd.h>
75	#include <sys/syscall.h>
76	int main (void)
77	{
78	long res = syscall (SYS_exit, 0);
79	return 0;
80	}
81	])],ac_cv_syscall=yes,ac_cv_syscall=no)])
82	test $ac_cv_syscall = yes && AC_DEFINE(HAVE_SYSCALL, 1, unix syscall interface)
83
84	AC_CACHE_CHECK([for splice, vmsplice and tee], ac_cv_linux_splice, [AC_LINK_IFELSE([AC_LANG_SOURCE([
85	#include <sys/types.h>
86	#include <fcntl.h>
87	#include <sys/uio.h>
88	int main (void)
89	{
90	ssize_t res;
91	res = splice ((int)0, (loff_t)0, (int)0, (loff_t *)0, (size_t)0, SPLICE_F_MOVE \| SPLICE_F_NONBLOCK \| SPLICE_F_MORE);
92	res = tee ((int)0, (int)0, (size_t)0, SPLICE_F_NONBLOCK);
93	res = vmsplice ((int)0, (struct iovec *)0, 0, SPLICE_F_NONBLOCK \| SPLICE_F_GIFT);
94	return 0;
95	}
96	])],ac_cv_linux_splice=yes,ac_cv_linux_splice=no)])
97	test $ac_cv_linux_splice = yes && AC_DEFINE(HAVE_LINUX_SPLICE, 1, splice/vmsplice/tee(2) are available)
98
99	AC_CACHE_CHECK(for pipe2, ac_cv_pipe2, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
100	#include <fcntl.h>
101	#include <unistd.h>
102	int main (void)
103	{
104	int res;
105	res = pipe2 (0, 0);
106	return 0;
107	}
108	]])],ac_cv_pipe2=yes,ac_cv_pipe2=no)])
109	test $ac_cv_pipe2 = yes && AC_DEFINE(HAVE_PIPE2, 1, pipe2(2) is available)
110
111	AC_CACHE_CHECK(for eventfd, ac_cv_eventfd, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
112	#include <sys/eventfd.h>
113	int main (void)
114	{
115	int res;
116	res = eventfd (1, EFD_CLOEXEC \| EFD_NONBLOCK);
117	return 0;
118	}
119	]])],ac_cv_eventfd=yes,ac_cv_eventfd=no)])
120	test $ac_cv_eventfd = yes && AC_DEFINE(HAVE_EVENTFD, 1, eventfd(2) is available)
121
122	AC_CACHE_CHECK(for timerfd_*, ac_cv_timerfd, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
123	#include <sys/timerfd.h>
124	int main (void)
125	{
126	struct itimerspec its;
127	int res;
128	res = timerfd_create (CLOCK_REALTIME, TFD_CLOEXEC \| TFD_NONBLOCK);
129	res = timerfd_settime (res, TFD_TIMER_ABSTIME /\| TFD_TIMER_CANCEL_ON_SET/, &its, 0);
130	res = timerfd_gettime (res, &its);
131	return 0;
132	}
133	]])],ac_cv_timerfd=yes,ac_cv_timerfd=no)])
134	test $ac_cv_timerfd = yes && AC_DEFINE(HAVE_TIMERFD, 1, timerfd_*(2) are available)
135
136	AC_CACHE_CHECK(for memfd_create, ac_cv_memfd_create, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
137	#include <sys/mman.h>
138	int main (void)
139	{
140	int res = memfd_create ("name", MFD_CLOEXEC \| MFD_ALLOW_SEALING);
141	return 0;
142	}
143	]])],ac_cv_memfd_create=yes,ac_cv_memfd_create=no)])
144	test $ac_cv_memfd_create = yes && AC_DEFINE(HAVE_MEMFD_CREATE, 1, memfd_create(2) is available)
145
146	AC_CACHE_CHECK(for copy_file_range, ac_cv_copy_file_range, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
147	#include <unistd.h>
148	#include <sys/syscall.h>
149	/#include <linux/copy.h>/
150	int main (void)
151	{
152	int res;
153	/res = syscall (SYS_copy_file_range, 0, 0, 0, 0, 0, COPY_FR_REFLINK \| COPY_FR_DEDUP \| COPY_FR_COPY);/
154	res = syscall (SYS_copy_file_range, 0, 0, 0, 0, 0, 0);
155	return 0;
156	}
157	]])],ac_cv_copy_file_range=yes,ac_cv_copy_file_range=no)])
158	test $ac_cv_copy_file_range = yes && AC_DEFINE(HAVE_COPY_FILE_RANGE, 1, copy_file_range(2) is available)
159
160	AC_CACHE_CHECK(for st_xtimensec, ac_cv_xtimensec, [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
161	#include "EXTERN.h"
162	#include "perl.h"
163	#include "XSUB.h"
164
165	int main (void)
166	{
167	return PL_statcache.st_atimensec
168	+ PL_statcache.st_mtimensec
169	+ PL_statcache.st_ctimensec;
170	}
171	]])],ac_cv_xtimensec=yes,ac_cv_xtimensec=no)])
172	test $ac_cv_xtimensec = yes && AC_DEFINE(HAVE_ST_XTIMENSEC, 1, stat nanosecond access by st_xtimensec)
173
174	AC_CACHE_CHECK(for st_xtimespec, ac_cv_xtimespec, [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
175	#include "EXTERN.h"
176	#include "perl.h"
177	#include "XSUB.h"
178
179	int main (void)
180	{
181	return PL_statcache.st_atim.tv_nsec
182	+ PL_statcache.st_mtim.tv_nsec
183	+ PL_statcache.st_ctim.tv_nsec;
184	}
185	]])],ac_cv_xtimespec=yes,ac_cv_xtimespec=no)])
186	test $ac_cv_xtimespec = yes && AC_DEFINE(HAVE_ST_XTIMESPEC, 1, stat nanosecond access by st_xtimespec)
187
188	# apparently, True64 uses st_u[amc]time, aix uses at_[amc]time_n and apple uses st_[amc,birth]timespec?
189
190	AC_CACHE_CHECK(for st_birthtimensec, ac_cv_birthtimensec, [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
191	#include "EXTERN.h"
192	#include "perl.h"
193	#include "XSUB.h"
194
195	int main (void)
196	{
197	return PL_statcache.st_birthtime + PL_statcache.st_birthtimensec;
198	}
199	]])],ac_cv_birthtimensec=yes,ac_cv_birthtimensec=no)])
200	test $ac_cv_birthtimensec = yes && AC_DEFINE(HAVE_ST_BIRTHTIMENSEC, 1, birthtime nanosecond access by st_birthtimensec)
201
202	AC_CACHE_CHECK(for st_birthtimespec, ac_cv_birthtimespec, [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
203	#include "EXTERN.h"
204	#include "perl.h"
205	#include "XSUB.h"
206
207	int main (void)
208	{
209	return PL_statcache.st_birthtim.tv_sec + PL_statcache.st_birthtim.tv_nsec;
210	}
211	]])],ac_cv_birthtimespec=yes,ac_cv_birthtimespec=no)])
212	test $ac_cv_birthtimespec = yes && AC_DEFINE(HAVE_ST_BIRTHTIMESPEC, 1, birthtime nanosecond access by st_birthtimespec)
213
214	AC_CACHE_CHECK(for st_gen, ac_cv_st_gen, [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
215	#include "EXTERN.h"
216	#include "perl.h"
217	#include "XSUB.h"
218
219	int main (void)
220	{
221	return PL_statcache.st_gen;
222	}
223	]])],ac_cv_st_gen=yes,ac_cv_st_gen=no)])
224	test $ac_cv_st_gen = yes && AC_DEFINE(HAVE_ST_GEN, 1, stat st_gen member)
225
226	AC_CACHE_CHECK(for statx, ac_cv_statx, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
227	#include <sys/types.h>
228	#include <sys/stat.h>
229	#include <unistd.h>
230	#include <fcntl.h>
231	int res;
232	int main (void)
233	{
234	struct statx sx;
235	int res;
236	res = statx (AT_FDCWD, ".",
237	AT_EMPTY_PATH \| AT_NO_AUTOMOUNT \| AT_SYMLINK_NOFOLLOW \| AT_STATX_SYNC_AS_STAT \| AT_STATX_FORCE_SYNC \| AT_STATX_DONT_SYNC,
238	STATX_ALL, &sx);
239	STATX_TYPE; STATX_MODE; STATX_NLINK; STATX_UID; STATX_GID; STATX_ATIME; STATX_MTIME; STATX_CTIME;
240	STATX_INO; STATX_SIZE; STATX_BLOCKS; STATX_BASIC_STATS; STATX_BTIME; STATX_ALL;
241	STATX_ATTR_COMPRESSED; STATX_ATTR_IMMUTABLE; STATX_ATTR_APPEND; STATX_ATTR_NODUMP; STATX_ATTR_ENCRYPTED;
242	return 0;
243	}
244	]])],ac_cv_statx=yes,ac_cv_statx=no)])
245	test $ac_cv_statx = yes && AC_DEFINE(HAVE_STATX, 1, statx(2) is available)
246
247	AC_CACHE_CHECK(for accept4, ac_cv_accept4, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
248	#include <sys/types.h>
249	#include <sys/socket.h>
250	int main (void)
251	{
252	int res;
253	res = accept4 (1, (struct sockaddr *)0, (socklen_t)0, SOCK_NONBLOCK \| SOCK_CLOEXEC);
254	return 0;
255	}
256	]])],ac_cv_accept4=yes,ac_cv_accept4=no)])
257	test $ac_cv_accept4 = yes && AC_DEFINE(HAVE_ACCEPT4, 1, accept4(2) is available)
258
259	AC_OUTPUT
260