1# sys_wait_h.m4 serial 9 2dnl Copyright (C) 2008-2022 Free Software Foundation, Inc. 3dnl This file is free software; the Free Software Foundation 4dnl gives unlimited permission to copy and/or distribute it, 5dnl with or without modifications, as long as this notice is preserved. 6 7AC_DEFUN_ONCE([gl_SYS_WAIT_H], 8[ 9 AC_REQUIRE([gl_SYS_WAIT_H_DEFAULTS]) 10 11 dnl <sys/wait.h> is always overridden, because of GNULIB_POSIXCHECK. 12 gl_CHECK_NEXT_HEADERS([sys/wait.h]) 13 14 dnl Ensure the type pid_t gets defined. 15 AC_REQUIRE([AC_TYPE_PID_T]) 16 17 dnl Check for declarations of anything we want to poison if the 18 dnl corresponding gnulib module is not in use. 19 gl_WARN_ON_USE_PREPARE([[#include <sys/wait.h>]], 20 [waitpid]) 21]) 22 23# gl_SYS_WAIT_MODULE_INDICATOR([modulename]) 24# sets the shell variable that indicates the presence of the given module 25# to a C preprocessor expression that will evaluate to 1. 26# This macro invocation must not occur in macros that are AC_REQUIREd. 27AC_DEFUN([gl_SYS_WAIT_MODULE_INDICATOR], 28[ 29 dnl Ensure to expand the default settings once only. 30 gl_SYS_WAIT_H_REQUIRE_DEFAULTS 31 gl_MODULE_INDICATOR_SET_VARIABLE([$1]) 32 dnl Define it also as a C macro, for the benefit of the unit tests. 33 gl_MODULE_INDICATOR_FOR_TESTS([$1]) 34]) 35 36# Initializes the default values for AC_SUBSTed shell variables. 37# This macro must not be AC_REQUIREd. It must only be invoked, and only 38# outside of macros or in macros that are not AC_REQUIREd. 39AC_DEFUN([gl_SYS_WAIT_H_REQUIRE_DEFAULTS], 40[ 41 m4_defun(GL_MODULE_INDICATOR_PREFIX[_SYS_WAIT_H_MODULE_INDICATOR_DEFAULTS], [ 42 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WAITPID]) 43 ]) 44 m4_require(GL_MODULE_INDICATOR_PREFIX[_SYS_WAIT_H_MODULE_INDICATOR_DEFAULTS]) 45 AC_REQUIRE([gl_SYS_WAIT_H_DEFAULTS]) 46]) 47 48AC_DEFUN([gl_SYS_WAIT_H_DEFAULTS], 49[ 50 dnl Assume proper GNU behavior unless another module says otherwise. 51]) 52