| # sys_uio_h.m4 serial 3 |
| dnl Copyright (C) 2011-2022 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], |
| [ |
| ]) |