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])

dnl fexecve has always been in the single unix specification
dnl but some atrocities (like opsnbsd and osx) claim implementing it
dnl but then not definining it. ugh. garbage. and fexecve would be
dnl useful for security, but, no, not on openbsd. we'd rather lie
dnl about it.
AC_CACHE_CHECK(for fexecve, ac_cv_fexecve, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
#include <fcntl.h>
#include <unistd.h>
int main (void)
{
   char *const argv[] = { "foo", "bar", 0 };
   int res = fexecve (-1, argv, 0);
   return 0;
}
]])],ac_cv_fexecve=yes,ac_cv_fexecve=no)])
test $ac_cv_fexecve = yes && AC_DEFINE(HAVE_FEXECVE, 1, fexecve(2) is available)

AC_CACHE_CHECK([for siginfo_t], ac_cv_siginfo_t, [AC_LINK_IFELSE([AC_LANG_SOURCE([
#include <signal.h>
int main (void)
{
   siginfo_t si;
   si.si_code;
   si.si_pid;
   si.si_uid;
   si.si_value.sival_int;
   si.si_value.sival_ptr;
   return 0;
}
])],ac_cv_siginfo_t=yes,ac_cv_siginfo_t=no)])
test $ac_cv_siginfo_t = yes && AC_DEFINE(HAVE_SIGINFO_T, 1, have siginfo_t in signal.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 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 = 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_CHECK_HEADERS([sys/mount.h])
AC_CACHE_CHECK(for mount, ac_cv_mount, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
#include <sys/mount.h>
int main (void)
{
   int res = mount ("path", "path", "fstype", MS_RDONLY, 0);
   return 0;
}
]])],ac_cv_mount=yes,ac_cv_mount=no)])
test $ac_cv_mount = yes && AC_DEFINE(HAVE_MOUNT, 1, mount is available)
AC_CACHE_CHECK(for umount, ac_cv_umount, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
#include <sys/mount.h>
int main (void)
{
   int res = umount ("path");
   return 0;
}
]])],ac_cv_umount=yes,ac_cv_umount=no)])
test $ac_cv_umount = yes && AC_DEFINE(HAVE_UMOUNT, 1, umount is available)
AC_CACHE_CHECK(for umount2, ac_cv_umount2, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
#include <sys/mount.h>
int main (void)
{
   int res = umount2 ("path", MNT_FORCE|MNT_DETACH);
   return 0;
}
]])],ac_cv_umount2=yes,ac_cv_umount2=no)])
test $ac_cv_umount2 = yes && AC_DEFINE(HAVE_UMOUNT2, 1, umount2 is available)

AC_OUTPUT

Revision:	1.22
Committed:	Thu Feb 29 18:02:43 2024 UTC (2 years ago) by root
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.21:	+0 -14 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	dnl fexecve has always been in the single unix specification
74	dnl but some atrocities (like opsnbsd and osx) claim implementing it
75	dnl but then not definining it. ugh. garbage. and fexecve would be
76	dnl useful for security, but, no, not on openbsd. we'd rather lie
77	dnl about it.
78	AC_CACHE_CHECK(for fexecve, ac_cv_fexecve, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
79	#include <fcntl.h>
80	#include <unistd.h>
81	int main (void)
82	{
83	char *const argv[] = { "foo", "bar", 0 };
84	int res = fexecve (-1, argv, 0);
85	return 0;
86	}
87	]])],ac_cv_fexecve=yes,ac_cv_fexecve=no)])
88	test $ac_cv_fexecve = yes && AC_DEFINE(HAVE_FEXECVE, 1, fexecve(2) is available)
89
90	AC_CACHE_CHECK([for siginfo_t], ac_cv_siginfo_t, [AC_LINK_IFELSE([AC_LANG_SOURCE([
91	#include <signal.h>
92	int main (void)
93	{
94	siginfo_t si;
95	si.si_code;
96	si.si_pid;
97	si.si_uid;
98	si.si_value.sival_int;
99	si.si_value.sival_ptr;
100	return 0;
101	}
102	])],ac_cv_siginfo_t=yes,ac_cv_siginfo_t=no)])
103	test $ac_cv_siginfo_t = yes && AC_DEFINE(HAVE_SIGINFO_T, 1, have siginfo_t in signal.h)
104
105	AC_CACHE_CHECK([for unix-style syscall interface], ac_cv_syscall, [AC_LINK_IFELSE([AC_LANG_SOURCE([
106	#include <unistd.h>
107	#include <sys/syscall.h>
108	int main (void)
109	{
110	long res = syscall (SYS_exit, 0);
111	return 0;
112	}
113	])],ac_cv_syscall=yes,ac_cv_syscall=no)])
114	test $ac_cv_syscall = yes && AC_DEFINE(HAVE_SYSCALL, 1, unix syscall interface)
115
116	AC_CACHE_CHECK([for splice, vmsplice and tee], ac_cv_linux_splice, [AC_LINK_IFELSE([AC_LANG_SOURCE([
117	#include <sys/types.h>
118	#include <fcntl.h>
119	#include <sys/uio.h>
120	int main (void)
121	{
122	ssize_t res;
123	res = splice ((int)0, (loff_t)0, (int)0, (loff_t *)0, (size_t)0, SPLICE_F_MOVE \| SPLICE_F_NONBLOCK \| SPLICE_F_MORE);
124	res = tee ((int)0, (int)0, (size_t)0, SPLICE_F_NONBLOCK);
125	res = vmsplice ((int)0, (struct iovec *)0, 0, SPLICE_F_NONBLOCK \| SPLICE_F_GIFT);
126	return 0;
127	}
128	])],ac_cv_linux_splice=yes,ac_cv_linux_splice=no)])
129	test $ac_cv_linux_splice = yes && AC_DEFINE(HAVE_LINUX_SPLICE, 1, splice/vmsplice/tee(2) are available)
130
131	AC_CACHE_CHECK(for pipe2, ac_cv_pipe2, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
132	#include <fcntl.h>
133	#include <unistd.h>
134	int main (void)
135	{
136	int res;
137	res = pipe2 (0, 0);
138	return 0;
139	}
140	]])],ac_cv_pipe2=yes,ac_cv_pipe2=no)])
141	test $ac_cv_pipe2 = yes && AC_DEFINE(HAVE_PIPE2, 1, pipe2(2) is available)
142
143	AC_CACHE_CHECK(for eventfd, ac_cv_eventfd, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
144	#include <sys/eventfd.h>
145	int main (void)
146	{
147	int res;
148	res = eventfd (1, EFD_CLOEXEC \| EFD_NONBLOCK);
149	return 0;
150	}
151	]])],ac_cv_eventfd=yes,ac_cv_eventfd=no)])
152	test $ac_cv_eventfd = yes && AC_DEFINE(HAVE_EVENTFD, 1, eventfd(2) is available)
153
154	AC_CACHE_CHECK(for timerfd_*, ac_cv_timerfd, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
155	#include <sys/timerfd.h>
156	int main (void)
157	{
158	struct itimerspec its;
159	int res;
160	res = timerfd_create (CLOCK_REALTIME, TFD_CLOEXEC \| TFD_NONBLOCK);
161	res = timerfd_settime (res, TFD_TIMER_ABSTIME /\| TFD_TIMER_CANCEL_ON_SET/, &its, 0);
162	res = timerfd_gettime (res, &its);
163	return 0;
164	}
165	]])],ac_cv_timerfd=yes,ac_cv_timerfd=no)])
166	test $ac_cv_timerfd = yes && AC_DEFINE(HAVE_TIMERFD, 1, timerfd_*(2) are available)
167
168	AC_CACHE_CHECK(for memfd_create, ac_cv_memfd_create, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
169	#include <sys/mman.h>
170	int main (void)
171	{
172	int res = memfd_create ("name", MFD_CLOEXEC \| MFD_ALLOW_SEALING);
173	return 0;
174	}
175	]])],ac_cv_memfd_create=yes,ac_cv_memfd_create=no)])
176	test $ac_cv_memfd_create = yes && AC_DEFINE(HAVE_MEMFD_CREATE, 1, memfd_create(2) is available)
177
178	AC_CACHE_CHECK(for st_xtimensec, ac_cv_xtimensec, [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
179	#include "EXTERN.h"
180	#include "perl.h"
181	#include "XSUB.h"
182
183	int main (void)
184	{
185	return PL_statcache.st_atimensec
186	+ PL_statcache.st_mtimensec
187	+ PL_statcache.st_ctimensec;
188	}
189	]])],ac_cv_xtimensec=yes,ac_cv_xtimensec=no)])
190	test $ac_cv_xtimensec = yes && AC_DEFINE(HAVE_ST_XTIMENSEC, 1, stat nanosecond access by st_xtimensec)
191
192	AC_CACHE_CHECK(for st_xtimespec, ac_cv_xtimespec, [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_atim.tv_nsec
200	+ PL_statcache.st_mtim.tv_nsec
201	+ PL_statcache.st_ctim.tv_nsec;
202	}
203	]])],ac_cv_xtimespec=yes,ac_cv_xtimespec=no)])
204	test $ac_cv_xtimespec = yes && AC_DEFINE(HAVE_ST_XTIMESPEC, 1, stat nanosecond access by st_xtimespec)
205
206	# apparently, True64 uses st_u[amc]time, aix uses at_[amc]time_n and apple uses st_[amc,birth]timespec?
207
208	AC_CACHE_CHECK(for st_birthtimensec, ac_cv_birthtimensec, [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
209	#include "EXTERN.h"
210	#include "perl.h"
211	#include "XSUB.h"
212
213	int main (void)
214	{
215	return PL_statcache.st_birthtime + PL_statcache.st_birthtimensec;
216	}
217	]])],ac_cv_birthtimensec=yes,ac_cv_birthtimensec=no)])
218	test $ac_cv_birthtimensec = yes && AC_DEFINE(HAVE_ST_BIRTHTIMENSEC, 1, birthtime nanosecond access by st_birthtimensec)
219
220	AC_CACHE_CHECK(for st_birthtimespec, ac_cv_birthtimespec, [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
221	#include "EXTERN.h"
222	#include "perl.h"
223	#include "XSUB.h"
224
225	int main (void)
226	{
227	return PL_statcache.st_birthtim.tv_sec + PL_statcache.st_birthtim.tv_nsec;
228	}
229	]])],ac_cv_birthtimespec=yes,ac_cv_birthtimespec=no)])
230	test $ac_cv_birthtimespec = yes && AC_DEFINE(HAVE_ST_BIRTHTIMESPEC, 1, birthtime nanosecond access by st_birthtimespec)
231
232	AC_CACHE_CHECK(for st_gen, ac_cv_st_gen, [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
233	#include "EXTERN.h"
234	#include "perl.h"
235	#include "XSUB.h"
236
237	int main (void)
238	{
239	return PL_statcache.st_gen;
240	}
241	]])],ac_cv_st_gen=yes,ac_cv_st_gen=no)])
242	test $ac_cv_st_gen = yes && AC_DEFINE(HAVE_ST_GEN, 1, stat st_gen member)
243
244	AC_CACHE_CHECK(for statx, ac_cv_statx, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
245	#include <sys/types.h>
246	#include <sys/stat.h>
247	#include <unistd.h>
248	#include <fcntl.h>
249	int res;
250	int main (void)
251	{
252	struct statx sx;
253	int res;
254	res = statx (AT_FDCWD, ".",
255	AT_EMPTY_PATH \| AT_NO_AUTOMOUNT \| AT_SYMLINK_NOFOLLOW \| AT_STATX_SYNC_AS_STAT \| AT_STATX_FORCE_SYNC \| AT_STATX_DONT_SYNC,
256	STATX_ALL, &sx);
257	STATX_TYPE; STATX_MODE; STATX_NLINK; STATX_UID; STATX_GID; STATX_ATIME; STATX_MTIME; STATX_CTIME;
258	STATX_INO; STATX_SIZE; STATX_BLOCKS; STATX_BASIC_STATS; STATX_BTIME; STATX_ALL;
259	STATX_ATTR_COMPRESSED; STATX_ATTR_IMMUTABLE; STATX_ATTR_APPEND; STATX_ATTR_NODUMP; STATX_ATTR_ENCRYPTED;
260	return 0;
261	}
262	]])],ac_cv_statx=yes,ac_cv_statx=no)])
263	test $ac_cv_statx = yes && AC_DEFINE(HAVE_STATX, 1, statx(2) is available)
264
265	AC_CACHE_CHECK(for accept4, ac_cv_accept4, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
266	#include <sys/types.h>
267	#include <sys/socket.h>
268	int main (void)
269	{
270	int res = accept4 (1, (struct sockaddr *)0, (socklen_t)0, SOCK_NONBLOCK \| SOCK_CLOEXEC);
271	return 0;
272	}
273	]])],ac_cv_accept4=yes,ac_cv_accept4=no)])
274	test $ac_cv_accept4 = yes && AC_DEFINE(HAVE_ACCEPT4, 1, accept4(2) is available)
275
276	AC_CHECK_HEADERS([sys/mount.h])
277	AC_CACHE_CHECK(for mount, ac_cv_mount, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
278	#include <sys/mount.h>
279	int main (void)
280	{
281	int res = mount ("path", "path", "fstype", MS_RDONLY, 0);
282	return 0;
283	}
284	]])],ac_cv_mount=yes,ac_cv_mount=no)])
285	test $ac_cv_mount = yes && AC_DEFINE(HAVE_MOUNT, 1, mount is available)
286	AC_CACHE_CHECK(for umount, ac_cv_umount, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
287	#include <sys/mount.h>
288	int main (void)
289	{
290	int res = umount ("path");
291	return 0;
292	}
293	]])],ac_cv_umount=yes,ac_cv_umount=no)])
294	test $ac_cv_umount = yes && AC_DEFINE(HAVE_UMOUNT, 1, umount is available)
295	AC_CACHE_CHECK(for umount2, ac_cv_umount2, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
296	#include <sys/mount.h>
297	int main (void)
298	{
299	int res = umount2 ("path", MNT_FORCE\|MNT_DETACH);
300	return 0;
301	}
302	]])],ac_cv_umount2=yes,ac_cv_umount2=no)])
303	test $ac_cv_umount2 = yes && AC_DEFINE(HAVE_UMOUNT2, 1, umount2 is available)
304
305	AC_OUTPUT
306