2 dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 dnl Written by Bruno Haible.
9 AC_DEFUN_ONCE([gl_SPAWN_H],
11 dnl Ensure to expand the default settings once only, before all statements
12 dnl that occur in other macros.
13 AC_REQUIRE([gl_SPAWN_H_DEFAULTS])
15 dnl <spawn.h> is always overridden, because of GNULIB_POSIXCHECK.
16 gl_CHECK_NEXT_HEADERS([spawn.h])
18 if test $ac_cv_header_spawn_h = yes; then
20 AC_CHECK_TYPES([posix_spawnattr_t], [], [HAVE_POSIX_SPAWNATTR_T=0], [[
23 AC_CHECK_TYPES([posix_spawn_file_actions_t], [],
24 [HAVE_POSIX_SPAWN_FILE_ACTIONS_T=0], [[
29 HAVE_POSIX_SPAWNATTR_T=0
30 HAVE_POSIX_SPAWN_FILE_ACTIONS_T=0
32 AC_SUBST([HAVE_SPAWN_H])
34 dnl Ensure the type pid_t gets defined.
35 AC_REQUIRE([AC_TYPE_PID_T])
37 dnl Ensure the type mode_t gets defined.
38 AC_REQUIRE([AC_TYPE_MODE_T])
40 AC_REQUIRE([gl_HAVE_POSIX_SPAWN])
42 AC_REQUIRE([AC_C_RESTRICT])
44 dnl Check for declarations of anything we want to poison if the
45 dnl corresponding gnulib module is not in use.
46 gl_WARN_ON_USE_PREPARE([[#include <spawn.h>
47 ]], [posix_spawn posix_spawnp posix_spawnattr_init posix_spawnattr_destroy
48 posix_spawnattr_getsigdefault posix_spawnattr_setsigdefault
49 posix_spawnattr_getsigmask posix_spawnattr_setsigmask
50 posix_spawnattr_getflags posix_spawnattr_setflags
51 posix_spawnattr_getpgroup posix_spawnattr_setpgroup
52 posix_spawnattr_getschedpolicy posix_spawnattr_setschedpolicy
53 posix_spawnattr_getschedparam posix_spawnattr_setschedparam
54 posix_spawn_file_actions_init posix_spawn_file_actions_destroy
55 posix_spawn_file_actions_addopen posix_spawn_file_actions_addclose
56 posix_spawn_file_actions_adddup2 posix_spawn_file_actions_addchdir
57 posix_spawn_file_actions_addfchdir])
60 dnl Checks whether the system has the functions posix_spawn.
61 dnl Sets ac_cv_func_posix_spawn and HAVE_POSIX_SPAWN.
62 AC_DEFUN([gl_HAVE_POSIX_SPAWN],
64 dnl Ensure to expand the default settings once only, before all statements
65 dnl that occur in other macros.
66 AC_REQUIRE([gl_SPAWN_H_DEFAULTS])
69 AC_SUBST([LIB_POSIX_SPAWN])
71 AC_SEARCH_LIBS([posix_spawn], [rt],
72 [test "$ac_cv_search_posix_spawn" = "none required" ||
73 LIB_POSIX_SPAWN=$ac_cv_search_posix_spawn])
74 AC_CHECK_FUNCS([posix_spawn])
77 if test $ac_cv_func_posix_spawn != yes; then
82 # gl_SPAWN_MODULE_INDICATOR([modulename])
83 # sets the shell variable that indicates the presence of the given module
84 # to a C preprocessor expression that will evaluate to 1.
85 # This macro invocation must not occur in macros that are AC_REQUIREd.
86 AC_DEFUN([gl_SPAWN_MODULE_INDICATOR],
88 dnl Ensure to expand the default settings once only.
89 gl_SPAWN_H_REQUIRE_DEFAULTS
90 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
91 dnl Define it also as a C macro, for the benefit of the unit tests.
92 gl_MODULE_INDICATOR_FOR_TESTS([$1])
95 # Initializes the default values for AC_SUBSTed shell variables.
96 # This macro must not be AC_REQUIREd. It must only be invoked, and only
97 # outside of macros or in macros that are not AC_REQUIREd.
98 AC_DEFUN([gl_SPAWN_H_REQUIRE_DEFAULTS],
100 m4_defun(GL_MODULE_INDICATOR_PREFIX[_SPAWN_H_MODULE_INDICATOR_DEFAULTS], [
101 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWN])
102 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNP])
103 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWN_FILE_ACTIONS_INIT])
104 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR])
105 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWN_FILE_ACTIONS_ADDCLOSE])
106 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWN_FILE_ACTIONS_ADDDUP2])
107 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWN_FILE_ACTIONS_ADDFCHDIR])
108 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWN_FILE_ACTIONS_ADDOPEN])
109 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWN_FILE_ACTIONS_DESTROY])
110 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_INIT])
111 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_GETFLAGS])
112 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_SETFLAGS])
113 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_GETPGROUP])
114 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_SETPGROUP])
115 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_GETSCHEDPARAM])
116 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_SETSCHEDPARAM])
117 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_GETSCHEDPOLICY])
118 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_SETSCHEDPOLICY])
119 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_GETSIGDEFAULT])
120 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_SETSIGDEFAULT])
121 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_GETSIGMASK])
122 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_SETSIGMASK])
123 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_DESTROY])
125 m4_require(GL_MODULE_INDICATOR_PREFIX[_SPAWN_H_MODULE_INDICATOR_DEFAULTS])
126 AC_REQUIRE([gl_SPAWN_H_DEFAULTS])
129 AC_DEFUN([gl_SPAWN_H_DEFAULTS],
131 dnl Assume proper GNU behavior unless another module says otherwise.
132 HAVE_POSIX_SPAWN=1; AC_SUBST([HAVE_POSIX_SPAWN])
133 HAVE_POSIX_SPAWNATTR_T=1; AC_SUBST([HAVE_POSIX_SPAWNATTR_T])
134 HAVE_POSIX_SPAWN_FILE_ACTIONS_T=1;
135 AC_SUBST([HAVE_POSIX_SPAWN_FILE_ACTIONS_T])
136 HAVE_POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR=1;
137 AC_SUBST([HAVE_POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR])
138 HAVE_POSIX_SPAWN_FILE_ACTIONS_ADDFCHDIR=1;
139 AC_SUBST([HAVE_POSIX_SPAWN_FILE_ACTIONS_ADDFCHDIR])
140 REPLACE_POSIX_SPAWN=0; AC_SUBST([REPLACE_POSIX_SPAWN])
141 REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR=0;
142 AC_SUBST([REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR])
143 REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDCLOSE=0;
144 AC_SUBST([REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDCLOSE])
145 REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDDUP2=0;
146 AC_SUBST([REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDDUP2])
147 REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDFCHDIR=0;
148 AC_SUBST([REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDFCHDIR])
149 REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDOPEN=0;
150 AC_SUBST([REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDOPEN])