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, 5 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 *
#	User	Rev	Content
1	root	1.1	AC_INIT
2			AC_CONFIG_SRCDIR([libeio/eio.h])
3	root	1.6	AC_CONFIG_HEADERS([config.h])
4	root	1.1
5	root	1.5	AC_PREREQ(2.60)
6			AC_USE_SYSTEM_EXTENSIONS
7
8	root	1.1	AC_PROG_CC
9
10			m4_include([libeio/libeio.m4])
11
12	root	1.6	# 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	root	1.13	int res;
21	root	1.6	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	root	1.8	dnl glibc major/minor macros
65			AC_CHECK_HEADERS([sys/sysmacros.h])
66
67	root	1.9	dnl solaris major/minor
68			AC_CHECK_HEADERS([sys/mkdev.h])
69
70	root	1.12	dnl readv / preadv, vmsplice
71			AC_CHECK_HEADERS([sys/uio.h])
72
73	root	1.16	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	root	1.12
84	root	1.6	AC_CACHE_CHECK([for splice, vmsplice and tee], ac_cv_linux_splice, [AC_LINK_IFELSE([AC_LANG_SOURCE([
85	root	1.11	#include <sys/types.h>
86	root	1.6	#include <fcntl.h>
87	root	1.12	#include <sys/uio.h>
88	root	1.6	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	root	1.13	int res;
105	root	1.6	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	root	1.13	int res;
116	root	1.6	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	root	1.14	AC_CACHE_CHECK(for timerfd_*, ac_cv_timerfd, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
123	root	1.6	#include <sys/timerfd.h>
124			int main (void)
125			{
126			struct itimerspec its;
127	root	1.13	int res;
128	root	1.6	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	root	1.14	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	root	1.6	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	root	1.13	int res;
153	root	1.6	/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	root	1.7	# apparently, True64 uses st_u[amc]time, aix uses at_[amc]time_n and apple uses st_[amc,birth]timespec?
189
190	root	1.10	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	root	1.13	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	root	1.15	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	root	1.1	AC_OUTPUT
260	root	1.6