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-rw-r--r--gl/m4/sys_uio_h.m425
1 files changed, 20 insertions, 5 deletions
diff --git a/gl/m4/sys_uio_h.m4 b/gl/m4/sys_uio_h.m4
index c75cbbd..93a65d2 100644
--- a/gl/m4/sys_uio_h.m4
+++ b/gl/m4/sys_uio_h.m4
@@ -1,10 +1,10 @@
1# sys_uio_h.m4 serial 1 1# sys_uio_h.m4 serial 3
2dnl Copyright (C) 2011-2013 Free Software Foundation, Inc. 2dnl Copyright (C) 2011-2023 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation 3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it, 4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved. 5dnl with or without modifications, as long as this notice is preserved.
6 6
7AC_DEFUN([gl_HEADER_SYS_UIO], 7AC_DEFUN_ONCE([gl_SYS_UIO_H],
8[ 8[
9 AC_REQUIRE([gl_SYS_UIO_H_DEFAULTS]) 9 AC_REQUIRE([gl_SYS_UIO_H_DEFAULTS])
10 dnl <sys/uio.h> is always overridden, because of GNULIB_POSIXCHECK. 10 dnl <sys/uio.h> is always overridden, because of GNULIB_POSIXCHECK.
@@ -17,15 +17,30 @@ AC_DEFUN([gl_HEADER_SYS_UIO],
17 AC_SUBST([HAVE_SYS_UIO_H]) 17 AC_SUBST([HAVE_SYS_UIO_H])
18]) 18])
19 19
20# gl_SYS_UIO_MODULE_INDICATOR([modulename])
21# sets the shell variable that indicates the presence of the given module
22# to a C preprocessor expression that will evaluate to 1.
23# This macro invocation must not occur in macros that are AC_REQUIREd.
20AC_DEFUN([gl_SYS_UIO_MODULE_INDICATOR], 24AC_DEFUN([gl_SYS_UIO_MODULE_INDICATOR],
21[ 25[
22 dnl Use AC_REQUIRE here, so that the default settings are expanded once only. 26 dnl Ensure to expand the default settings once only.
23 AC_REQUIRE([gl_SYS_UIO_H_DEFAULTS]) 27 gl_SYS_UIO_H_REQUIRE_DEFAULTS
24 gl_MODULE_INDICATOR_SET_VARIABLE([$1]) 28 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
25 dnl Define it also as a C macro, for the benefit of the unit tests. 29 dnl Define it also as a C macro, for the benefit of the unit tests.
26 gl_MODULE_INDICATOR_FOR_TESTS([$1]) 30 gl_MODULE_INDICATOR_FOR_TESTS([$1])
27]) 31])
28 32
33# Initializes the default values for AC_SUBSTed shell variables.
34# This macro must not be AC_REQUIREd. It must only be invoked, and only
35# outside of macros or in macros that are not AC_REQUIREd.
36AC_DEFUN([gl_SYS_UIO_H_REQUIRE_DEFAULTS],
37[
38 m4_defun(GL_MODULE_INDICATOR_PREFIX[_SYS_UIO_H_MODULE_INDICATOR_DEFAULTS], [
39 ])
40 m4_require(GL_MODULE_INDICATOR_PREFIX[_SYS_UIO_H_MODULE_INDICATOR_DEFAULTS])
41 AC_REQUIRE([gl_SYS_UIO_H_DEFAULTS])
42])
43
29AC_DEFUN([gl_SYS_UIO_H_DEFAULTS], 44AC_DEFUN([gl_SYS_UIO_H_DEFAULTS],
30[ 45[
31]) 46])