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-rw-r--r--m4/sys_file_h.m456
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+# Configure a replacement for <sys/file.h>.
+# serial 9
+
+# Copyright (C) 2008-2022 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# Written by Richard W.M. Jones.
+
+AC_DEFUN_ONCE([gl_SYS_FILE_H],
+[
+ AC_REQUIRE([gl_SYS_FILE_H_DEFAULTS])
+
+ dnl <sys/file.h> is always overridden, because of GNULIB_POSIXCHECK.
+ gl_CHECK_NEXT_HEADERS([sys/file.h])
+
+ if test $ac_cv_header_sys_file_h = yes; then
+ HAVE_SYS_FILE_H=1
+ else
+ HAVE_SYS_FILE_H=0
+ fi
+ AC_SUBST([HAVE_SYS_FILE_H])
+
+ dnl Check for declarations of anything we want to poison if the
+ dnl corresponding gnulib module is not in use.
+ gl_WARN_ON_USE_PREPARE([[#include <sys/file.h>
+ ]], [flock])
+])
+
+# gl_SYS_FILE_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_SYS_FILE_MODULE_INDICATOR],
+[
+ gl_SYS_FILE_H_REQUIRE_DEFAULTS
+ gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd. It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_SYS_FILE_H_REQUIRE_DEFAULTS],
+[
+ m4_defun(GL_MODULE_INDICATOR_PREFIX[_SYS_FILE_H_MODULE_INDICATOR_DEFAULTS], [
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FLOCK])
+ ])
+ m4_require(GL_MODULE_INDICATOR_PREFIX[_SYS_FILE_H_MODULE_INDICATOR_DEFAULTS])
+ AC_REQUIRE([gl_SYS_FILE_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_SYS_FILE_H_DEFAULTS],
+[
+ HAVE_FLOCK=1; AC_SUBST([HAVE_FLOCK])
+])