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-rw-r--r--m4/sys_uio_h.m446
1 files changed, 46 insertions, 0 deletions
diff --git a/m4/sys_uio_h.m4 b/m4/sys_uio_h.m4
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+# sys_uio_h.m4 serial 3
+dnl Copyright (C) 2011-2023 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_ONCE([gl_SYS_UIO_H],
+[
+ AC_REQUIRE([gl_SYS_UIO_H_DEFAULTS])
+ dnl <sys/uio.h> is always overridden, because of GNULIB_POSIXCHECK.
+ gl_CHECK_NEXT_HEADERS([sys/uio.h])
+ if test $ac_cv_header_sys_uio_h = yes; then
+ HAVE_SYS_UIO_H=1
+ else
+ HAVE_SYS_UIO_H=0
+ fi
+ AC_SUBST([HAVE_SYS_UIO_H])
+])
+
+# gl_SYS_UIO_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_UIO_MODULE_INDICATOR],
+[
+ dnl Ensure to expand the default settings once only.
+ gl_SYS_UIO_H_REQUIRE_DEFAULTS
+ gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+ dnl Define it also as a C macro, for the benefit of the unit tests.
+ gl_MODULE_INDICATOR_FOR_TESTS([$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_UIO_H_REQUIRE_DEFAULTS],
+[
+ m4_defun(GL_MODULE_INDICATOR_PREFIX[_SYS_UIO_H_MODULE_INDICATOR_DEFAULTS], [
+ ])
+ m4_require(GL_MODULE_INDICATOR_PREFIX[_SYS_UIO_H_MODULE_INDICATOR_DEFAULTS])
+ AC_REQUIRE([gl_SYS_UIO_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_SYS_UIO_H_DEFAULTS],
+[
+])