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root |
1.1 |
AC_PREREQ(2.59) |
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AC_INIT |
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AC_CONFIG_HEADERS([config.h]) |
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| 5 |
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AC_PROG_CC |
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AC_CACHE_CHECK(for readahead, ac_cv_readahead, [AC_LINK_IFELSE([ |
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#include <fcntl.h> |
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int main(void) |
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{ |
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int fd = 0; |
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off64_t offset = 1; |
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size_t count = 2; |
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ssize_t res; |
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res = readahead (fd, offset, count); |
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return 0; |
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} |
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],ac_cv_readahead=yes,ac_cv_readahead=no)]) |
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test $ac_cv_readahead = yes && AC_DEFINE(HAVE_READAHEAD, 1, readahead(2) is available (linux)) |
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| 21 |
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AC_CACHE_CHECK(for fdatasync, ac_cv_fdatasync, [AC_LINK_IFELSE([ |
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#include <unistd.h> |
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int main(void) |
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{ |
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int fd = 0; |
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fdatasync (fd); |
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return 0; |
| 28 |
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} |
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],ac_cv_fdatasync=yes,ac_cv_fdatasync=no)]) |
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test $ac_cv_fdatasync = yes && AC_DEFINE(HAVE_FDATASYNC, 1, fdatasync(2) is available) |
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AC_CACHE_CHECK(for pread and pwrite, ac_cv_preadwrite, [AC_LINK_IFELSE([ |
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#include <unistd.h> |
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int main(void) |
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{ |
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int fd = 0; |
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size_t count = 1; |
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char buf; |
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off_t offset = 1; |
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ssize_t res; |
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res = pread (fd, &buf, count, offset); |
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res = pwrite (fd, &buf, count, offset); |
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return 0; |
| 44 |
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} |
| 45 |
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],ac_cv_preadwrite=yes,ac_cv_preadwrite=no)]) |
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test $ac_cv_preadwrite = yes && AC_DEFINE(HAVE_PREADWRITE, 1, pread(2) and pwrite(2) are available) |
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| 48 |
root |
1.3 |
AC_CACHE_CHECK(for sendfile, ac_cv_sendfile, [AC_LINK_IFELSE([ |
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# include <sys/types.h> |
| 50 |
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#if __linux |
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# include <sys/sendfile.h> |
| 52 |
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#elif __freebsd |
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# include <sys/socket.h> |
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# include <sys/uio.h> |
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#elif __hpux |
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# include <sys/socket.h> |
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#endif |
| 58 |
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int main(void) |
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{ |
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int fd = 0; |
| 61 |
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off_t offset = 1; |
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size_t count = 2; |
| 63 |
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ssize_t res; |
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#if __linux |
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res = sendfile (fd, fd, offset, count); |
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#elif __freebsd |
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res = sendfile (fd, fd, offset, count, 0, &offset, 0); |
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#elif __hpux |
| 69 |
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res = sendfile (fd, fd, offset, count, 0, 0); |
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#endif |
| 71 |
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return 0; |
| 72 |
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} |
| 73 |
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],ac_cv_sendfile=yes,ac_cv_sendfile=no)]) |
| 74 |
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test $ac_cv_sendfile = yes && AC_DEFINE(HAVE_SENDFILE, 1, sendfile(2) is available and supported) |
| 75 |
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| 76 |
root |
1.1 |
AC_OUTPUT |
