libeio/libeio.m4

dnl openbsd in it's neverending brokenness requires stdint.h for intptr_t,
dnl but that header isn't very portable...
AC_CHECK_HEADERS([stdint.h sys/syscall.h sys/prctl.h])

AC_SEARCH_LIBS(
   pthread_create,
   [pthread pthreads pthreadVC2],
   ,
   [AC_MSG_ERROR(pthread functions not found)]
)

AC_CACHE_CHECK(for utimes, ac_cv_utimes, [AC_LINK_IFELSE([[
#include <sys/types.h>
#include <sys/time.h>
#include <utime.h>
struct timeval tv[2];
int res;
int main (void)
{
   res = utimes ("/", tv);
   return 0;
}
]],ac_cv_utimes=yes,ac_cv_utimes=no)])
test $ac_cv_utimes = yes && AC_DEFINE(HAVE_UTIMES, 1, utimes(2) is available)

AC_CACHE_CHECK(for futimes, ac_cv_futimes, [AC_LINK_IFELSE([[
#include <sys/types.h>
#include <sys/time.h>
#include <utime.h>
struct timeval tv[2];
int res;
int fd;
int main (void)
{
   res = futimes (fd, tv);
   return 0;
}
]],ac_cv_futimes=yes,ac_cv_futimes=no)])
test $ac_cv_futimes = yes && AC_DEFINE(HAVE_FUTIMES, 1, futimes(2) is available)

AC_CACHE_CHECK(for readahead, ac_cv_readahead, [AC_LINK_IFELSE([
#include <fcntl.h>
int main (void)
{
   int fd = 0;
   size_t count = 2;
   ssize_t res;
   res = readahead (fd, 0, count);
   return 0;
}
],ac_cv_readahead=yes,ac_cv_readahead=no)])
test $ac_cv_readahead = yes && AC_DEFINE(HAVE_READAHEAD, 1, readahead(2) is available (linux))

AC_CACHE_CHECK(for fdatasync, ac_cv_fdatasync, [AC_LINK_IFELSE([
#include <unistd.h>
int main (void)
{
   int fd = 0;
   fdatasync (fd);
   return 0;
}
],ac_cv_fdatasync=yes,ac_cv_fdatasync=no)])
test $ac_cv_fdatasync = yes && AC_DEFINE(HAVE_FDATASYNC, 1, fdatasync(2) is available)

AC_CACHE_CHECK(for sendfile, ac_cv_sendfile, [AC_LINK_IFELSE([
# include <sys/types.h>
#if __linux
# include <sys/sendfile.h>
#elif __FreeBSD__ || defined __APPLE__
# include <sys/socket.h>
# include <sys/uio.h>
#elif __hpux
# include <sys/socket.h>
#else
# error unsupported architecture
#endif
int main (void)
{
   int fd = 0;
   off_t offset = 1;
   size_t count = 2;
   ssize_t res;
#if __linux
   res = sendfile (fd, fd, offset, count);
#elif __FreeBSD__
   res = sendfile (fd, fd, offset, count, 0, &offset, 0);
#elif __hpux
   res = sendfile (fd, fd, offset, count, 0, 0);
#endif
   return 0;
}
],ac_cv_sendfile=yes,ac_cv_sendfile=no)])
test $ac_cv_sendfile = yes && AC_DEFINE(HAVE_SENDFILE, 1, sendfile(2) is available and supported)

AC_CACHE_CHECK(for sync_file_range, ac_cv_sync_file_range, [AC_LINK_IFELSE([
#include <fcntl.h>
int main (void)
{
   int fd = 0;
   off64_t offset = 1;
   off64_t nbytes = 1;
   unsigned int flags = SYNC_FILE_RANGE_WAIT_BEFORE|SYNC_FILE_RANGE_WRITE|SYNC_FILE_RANGE_WAIT_AFTER;
   ssize_t res;
   res = sync_file_range (fd, offset, nbytes, flags);
   return 0;
}
],ac_cv_sync_file_range=yes,ac_cv_sync_file_range=no)])
test $ac_cv_sync_file_range = yes && AC_DEFINE(HAVE_SYNC_FILE_RANGE, 1, sync_file_range(2) is available)

AC_CACHE_CHECK(for fallocate, ac_cv_linux_fallocate, [AC_LINK_IFELSE([
#include <fcntl.h>
int main (void)
{
   int fd = 0;
   int mode = 0;
   off_t offset = 1;
   off_t len = 1;
   int res;
   res = fallocate (fd, mode, offset, len);
   return 0;
}
],ac_cv_linux_fallocate=yes,ac_cv_linux_fallocate=no)])
test $ac_cv_linux_fallocate = yes && AC_DEFINE(HAVE_LINUX_FALLOCATE, 1, fallocate(2) is available)

AC_CACHE_CHECK(for sys_syncfs, ac_cv_sys_syncfs, [AC_LINK_IFELSE([
#include <unistd.h>
#include <sys/syscall.h>
int main (void)
{
  int res = syscall (__NR_syncfs, (int)0);
}
],ac_cv_sys_syncfs=yes,ac_cv_sys_syncfs=no)])
test $ac_cv_sys_syncfs = yes && AC_DEFINE(HAVE_SYS_SYNCFS, 1, syscall(__NR_syncfs) is available)

AC_CACHE_CHECK(for prctl_set_name, ac_cv_prctl_set_name, [AC_LINK_IFELSE([
#include <sys/prctl.h>
int main (void)
{
  char name[] = "test123";
  int res = prctl (PR_SET_NAME, (unsigned long)name, 0, 0, 0);
}
],ac_cv_prctl_set_name=yes,ac_cv_prctl_set_name=no)])
test $ac_cv_prctl_set_name = yes && AC_DEFINE(HAVE_PRCTL_SET_NAME, 1, prctl(PR_SET_NAME) is available)

dnl #############################################################################
dnl # these checks exist for the benefit of IO::AIO

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([
#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([
#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])

AC_CACHE_CHECK([for splice, vmsplice and tee], ac_cv_linux_splice, [AC_LINK_IFELSE([
#include <fcntl.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)

Revision:	1.20
Committed:	Sat Jun 2 20:13:26 2012 UTC (11 years, 11 months ago) by root
Branch:	MAIN
CVS Tags:	rel-4_17, rel-4_18
Changes since 1.19:	+0 -16 lines
Log Message:	nuke pread/pwrite emulation
#	User	Rev	Content
1	root	1.13	dnl openbsd in it's neverending brokenness requires stdint.h for intptr_t,
2			dnl but that header isn't very portable...
3	root	1.17	AC_CHECK_HEADERS([stdint.h sys/syscall.h sys/prctl.h])
4	root	1.13
5	root	1.2	AC_SEARCH_LIBS(
6			pthread_create,
7			[pthread pthreads pthreadVC2],
8			,
9			[AC_MSG_ERROR(pthread functions not found)]
10			)
11
12	root	1.11	AC_CACHE_CHECK(for utimes, ac_cv_utimes, [AC_LINK_IFELSE([[
13			#include <sys/types.h>
14			#include <sys/time.h>
15			#include <utime.h>
16			struct timeval tv[2];
17			int res;
18			int main (void)
19			{
20			res = utimes ("/", tv);
21			return 0;
22			}
23			]],ac_cv_utimes=yes,ac_cv_utimes=no)])
24			test $ac_cv_utimes = yes && AC_DEFINE(HAVE_UTIMES, 1, utimes(2) is available)
25
26	root	1.1	AC_CACHE_CHECK(for futimes, ac_cv_futimes, [AC_LINK_IFELSE([[
27			#include <sys/types.h>
28			#include <sys/time.h>
29			#include <utime.h>
30			struct timeval tv[2];
31			int res;
32			int fd;
33	root	1.10	int main (void)
34	root	1.1	{
35			res = futimes (fd, tv);
36			return 0;
37			}
38			]],ac_cv_futimes=yes,ac_cv_futimes=no)])
39			test $ac_cv_futimes = yes && AC_DEFINE(HAVE_FUTIMES, 1, futimes(2) is available)
40
41			AC_CACHE_CHECK(for readahead, ac_cv_readahead, [AC_LINK_IFELSE([
42			#include <fcntl.h>
43	root	1.10	int main (void)
44	root	1.1	{
45			int fd = 0;
46			size_t count = 2;
47			ssize_t res;
48	root	1.5	res = readahead (fd, 0, count);
49	root	1.1	return 0;
50			}
51			],ac_cv_readahead=yes,ac_cv_readahead=no)])
52			test $ac_cv_readahead = yes && AC_DEFINE(HAVE_READAHEAD, 1, readahead(2) is available (linux))
53
54			AC_CACHE_CHECK(for fdatasync, ac_cv_fdatasync, [AC_LINK_IFELSE([
55			#include <unistd.h>
56	root	1.10	int main (void)
57	root	1.1	{
58			int fd = 0;
59			fdatasync (fd);
60			return 0;
61			}
62			],ac_cv_fdatasync=yes,ac_cv_fdatasync=no)])
63			test $ac_cv_fdatasync = yes && AC_DEFINE(HAVE_FDATASYNC, 1, fdatasync(2) is available)
64
65			AC_CACHE_CHECK(for sendfile, ac_cv_sendfile, [AC_LINK_IFELSE([
66			# include <sys/types.h>
67			#if __linux
68			# include <sys/sendfile.h>
69	root	1.9	#elif __FreeBSD__ \|\| defined __APPLE__
70	root	1.1	# include <sys/socket.h>
71			# include <sys/uio.h>
72			#elif __hpux
73			# include <sys/socket.h>
74			#else
75			# error unsupported architecture
76			#endif
77	root	1.10	int main (void)
78	root	1.1	{
79			int fd = 0;
80			off_t offset = 1;
81			size_t count = 2;
82			ssize_t res;
83			#if __linux
84			res = sendfile (fd, fd, offset, count);
85	root	1.9	#elif __FreeBSD__
86	root	1.1	res = sendfile (fd, fd, offset, count, 0, &offset, 0);
87			#elif __hpux
88			res = sendfile (fd, fd, offset, count, 0, 0);
89			#endif
90			return 0;
91			}
92			],ac_cv_sendfile=yes,ac_cv_sendfile=no)])
93			test $ac_cv_sendfile = yes && AC_DEFINE(HAVE_SENDFILE, 1, sendfile(2) is available and supported)
94
95	root	1.7	AC_CACHE_CHECK(for sync_file_range, ac_cv_sync_file_range, [AC_LINK_IFELSE([
96			#include <fcntl.h>
97	root	1.10	int main (void)
98	root	1.7	{
99			int fd = 0;
100			off64_t offset = 1;
101			off64_t nbytes = 1;
102			unsigned int flags = SYNC_FILE_RANGE_WAIT_BEFORE\|SYNC_FILE_RANGE_WRITE\|SYNC_FILE_RANGE_WAIT_AFTER;
103			ssize_t res;
104			res = sync_file_range (fd, offset, nbytes, flags);
105			return 0;
106			}
107			],ac_cv_sync_file_range=yes,ac_cv_sync_file_range=no)])
108			test $ac_cv_sync_file_range = yes && AC_DEFINE(HAVE_SYNC_FILE_RANGE, 1, sync_file_range(2) is available)
109
110	sf-exg	1.19	AC_CACHE_CHECK(for fallocate, ac_cv_linux_fallocate, [AC_LINK_IFELSE([
111	root	1.14	#include <fcntl.h>
112			int main (void)
113			{
114			int fd = 0;
115	root	1.15	int mode = 0;
116	root	1.14	off_t offset = 1;
117			off_t len = 1;
118			int res;
119			res = fallocate (fd, mode, offset, len);
120			return 0;
121			}
122	root	1.18	],ac_cv_linux_fallocate=yes,ac_cv_linux_fallocate=no)])
123			test $ac_cv_linux_fallocate = yes && AC_DEFINE(HAVE_LINUX_FALLOCATE, 1, fallocate(2) is available)
124	root	1.14
125	root	1.16	AC_CACHE_CHECK(for sys_syncfs, ac_cv_sys_syncfs, [AC_LINK_IFELSE([
126			#include <unistd.h>
127			#include <sys/syscall.h>
128			int main (void)
129			{
130			int res = syscall (__NR_syncfs, (int)0);
131			}
132			],ac_cv_sys_syncfs=yes,ac_cv_sys_syncfs=no)])
133			test $ac_cv_sys_syncfs = yes && AC_DEFINE(HAVE_SYS_SYNCFS, 1, syscall(__NR_syncfs) is available)
134
135	root	1.17	AC_CACHE_CHECK(for prctl_set_name, ac_cv_prctl_set_name, [AC_LINK_IFELSE([
136			#include <sys/prctl.h>
137			int main (void)
138			{
139			char name[] = "test123";
140			int res = prctl (PR_SET_NAME, (unsigned long)name, 0, 0, 0);
141			}
142			],ac_cv_prctl_set_name=yes,ac_cv_prctl_set_name=no)])
143			test $ac_cv_prctl_set_name = yes && AC_DEFINE(HAVE_PRCTL_SET_NAME, 1, prctl(PR_SET_NAME) is available)
144
145	root	1.12	dnl #############################################################################
146			dnl # these checks exist for the benefit of IO::AIO
147
148			dnl at least uclibc defines _POSIX_ADVISORY_INFO without any of the required
149			dnl functionality actually being present. ugh.
150			AC_CACHE_CHECK(for posix_madvise, ac_cv_posix_madvise, [AC_LINK_IFELSE([
151			#include <sys/mman.h>
152			int main (void)
153			{
154			int res = posix_madvise ((void *)0, (size_t)0, POSIX_MADV_NORMAL);
155			int a = POSIX_MADV_SEQUENTIAL;
156			int b = POSIX_MADV_RANDOM;
157			int c = POSIX_MADV_WILLNEED;
158			int d = POSIX_MADV_DONTNEED;
159			return 0;
160			}
161			],ac_cv_posix_madvise=yes,ac_cv_posix_madvise=no)])
162			test $ac_cv_posix_madvise = yes && AC_DEFINE(HAVE_POSIX_MADVISE, 1, posix_madvise(2) is available)
163
164			AC_CACHE_CHECK(for posix_fadvise, ac_cv_posix_fadvise, [AC_LINK_IFELSE([
165			#define _XOPEN_SOURCE 600
166			#include <fcntl.h>
167			int main (void)
168			{
169			int res = posix_fadvise ((int)0, (off_t)0, (off_t)0, POSIX_FADV_NORMAL);
170			int a = POSIX_FADV_SEQUENTIAL;
171			int b = POSIX_FADV_NOREUSE;
172			int c = POSIX_FADV_RANDOM;
173			int d = POSIX_FADV_WILLNEED;
174			int e = POSIX_FADV_DONTNEED;
175			return 0;
176			}
177			],ac_cv_posix_fadvise=yes,ac_cv_posix_fadvise=no)])
178			test $ac_cv_posix_fadvise = yes && AC_DEFINE(HAVE_POSIX_FADVISE, 1, posix_fadvise(2) is available)
179
180	root	1.18	dnl lots of linux specifics
181			AC_CHECK_HEADERS([linux/fs.h linux/fiemap.h])
182
183			AC_CACHE_CHECK([for splice, vmsplice and tee], ac_cv_linux_splice, [AC_LINK_IFELSE([
184			#include <fcntl.h>
185			int main (void)
186			{
187			ssize_t res;
188			res = splice ((int)0, (loff_t)0, (int)0, (loff_t *)0, (size_t)0, SPLICE_F_MOVE \| SPLICE_F_NONBLOCK \| SPLICE_F_MORE);
189			res = tee ((int)0, (int)0, (size_t)0, SPLICE_F_NONBLOCK);
190			res = vmsplice ((int)0, (struct iovec *)0, 0, SPLICE_F_NONBLOCK \| SPLICE_F_GIFT);
191			return 0;
192			}
193			],ac_cv_linux_splice=yes,ac_cv_linux_splice=no)])
194			test $ac_cv_linux_splice = yes && AC_DEFINE(HAVE_LINUX_SPLICE, 1, splice/vmsplice/tee(2) are available)
195