1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
# fdatasync.m4 serial 6
dnl Copyright (C) 2008-2023 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_FDATASYNC],
[
AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
AC_REQUIRE([AC_CANONICAL_HOST])
dnl Using AC_CHECK_FUNCS_ONCE would break our subsequent AC_SEARCH_LIBS
AC_CHECK_DECLS_ONCE([fdatasync])
LIB_FDATASYNC=
AC_SUBST([LIB_FDATASYNC])
if test $ac_cv_have_decl_fdatasync = no; then
HAVE_DECL_FDATASYNC=0
dnl Mac OS X 10.7 has fdatasync but does not declare it.
AC_CHECK_FUNCS([fdatasync])
if test $ac_cv_func_fdatasync = no; then
HAVE_FDATASYNC=0
fi
else
case "$host_os" in
solaris*)
dnl Solaris <= 2.6 has fdatasync() in libposix4.
dnl Solaris 7..9 has it in librt.
dnl Solaris 10 sometimes has it in librt <https://bugs.gnu.org/21059>.
gl_saved_libs=$LIBS
AC_SEARCH_LIBS([fdatasync], [rt posix4],
[test "$ac_cv_search_fdatasync" = "none required" ||
LIB_FDATASYNC=$ac_cv_search_fdatasync])
LIBS=$gl_saved_libs
;;
*)
dnl Android 4.3 does not have fdatasync but declares it.
AC_CHECK_FUNCS([fdatasync])
if test $ac_cv_func_fdatasync = no; then
HAVE_FDATASYNC=0
fi
;;
esac
fi
])
|
