52 lines
1.8 KiB
Plaintext
52 lines
1.8 KiB
Plaintext
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# sys_wait_h.m4 serial 9
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dnl Copyright (C) 2008-2023 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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AC_DEFUN_ONCE([gl_SYS_WAIT_H],
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[
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AC_REQUIRE([gl_SYS_WAIT_H_DEFAULTS])
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dnl <sys/wait.h> is always overridden, because of GNULIB_POSIXCHECK.
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gl_CHECK_NEXT_HEADERS([sys/wait.h])
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dnl Ensure the type pid_t gets defined.
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AC_REQUIRE([AC_TYPE_PID_T])
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dnl Check for declarations of anything we want to poison if the
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dnl corresponding gnulib module is not in use.
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gl_WARN_ON_USE_PREPARE([[#include <sys/wait.h>]],
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[waitpid])
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])
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# gl_SYS_WAIT_MODULE_INDICATOR([modulename])
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# sets the shell variable that indicates the presence of the given module
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# to a C preprocessor expression that will evaluate to 1.
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# This macro invocation must not occur in macros that are AC_REQUIREd.
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AC_DEFUN([gl_SYS_WAIT_MODULE_INDICATOR],
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[
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dnl Ensure to expand the default settings once only.
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gl_SYS_WAIT_H_REQUIRE_DEFAULTS
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gl_MODULE_INDICATOR_SET_VARIABLE([$1])
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dnl Define it also as a C macro, for the benefit of the unit tests.
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gl_MODULE_INDICATOR_FOR_TESTS([$1])
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])
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# Initializes the default values for AC_SUBSTed shell variables.
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# This macro must not be AC_REQUIREd. It must only be invoked, and only
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# outside of macros or in macros that are not AC_REQUIREd.
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AC_DEFUN([gl_SYS_WAIT_H_REQUIRE_DEFAULTS],
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[
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m4_defun(GL_MODULE_INDICATOR_PREFIX[_SYS_WAIT_H_MODULE_INDICATOR_DEFAULTS], [
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gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WAITPID])
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])
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m4_require(GL_MODULE_INDICATOR_PREFIX[_SYS_WAIT_H_MODULE_INDICATOR_DEFAULTS])
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AC_REQUIRE([gl_SYS_WAIT_H_DEFAULTS])
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])
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AC_DEFUN([gl_SYS_WAIT_H_DEFAULTS],
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[
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dnl Assume proper GNU behavior unless another module says otherwise.
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])
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