# spawn_h.m4 serial 24 dnl Copyright (C) 2008-2023 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. dnl Written by Bruno Haible. AC_DEFUN_ONCE([gl_SPAWN_H], [ dnl Ensure to expand the default settings once only, before all statements dnl that occur in other macros. AC_REQUIRE([gl_SPAWN_H_DEFAULTS]) dnl is always overridden, because of GNULIB_POSIXCHECK. gl_CHECK_NEXT_HEADERS([spawn.h]) if test $ac_cv_header_spawn_h = yes; then HAVE_SPAWN_H=1 AC_CHECK_TYPES([posix_spawnattr_t], [], [HAVE_POSIX_SPAWNATTR_T=0], [[ #include ]]) AC_CHECK_TYPES([posix_spawn_file_actions_t], [], [HAVE_POSIX_SPAWN_FILE_ACTIONS_T=0], [[ #include ]]) else HAVE_SPAWN_H=0 HAVE_POSIX_SPAWNATTR_T=0 HAVE_POSIX_SPAWN_FILE_ACTIONS_T=0 fi AC_SUBST([HAVE_SPAWN_H]) dnl Ensure the type pid_t gets defined. AC_REQUIRE([AC_TYPE_PID_T]) dnl Ensure the type mode_t gets defined. AC_REQUIRE([AC_TYPE_MODE_T]) AC_REQUIRE([gl_HAVE_POSIX_SPAWN]) AC_REQUIRE([AC_C_RESTRICT]) dnl Check for declarations of anything we want to poison if the dnl corresponding gnulib module is not in use. gl_WARN_ON_USE_PREPARE([[#include ]], [posix_spawn posix_spawnp posix_spawnattr_init posix_spawnattr_destroy posix_spawnattr_getsigdefault posix_spawnattr_setsigdefault posix_spawnattr_getsigmask posix_spawnattr_setsigmask posix_spawnattr_getflags posix_spawnattr_setflags posix_spawnattr_getpgroup posix_spawnattr_setpgroup posix_spawnattr_getschedpolicy posix_spawnattr_setschedpolicy posix_spawnattr_getschedparam posix_spawnattr_setschedparam posix_spawn_file_actions_init posix_spawn_file_actions_destroy posix_spawn_file_actions_addopen posix_spawn_file_actions_addclose posix_spawn_file_actions_adddup2 posix_spawn_file_actions_addchdir posix_spawn_file_actions_addfchdir]) ]) dnl Checks whether the system has the functions posix_spawn. dnl Sets ac_cv_func_posix_spawn and HAVE_POSIX_SPAWN. AC_DEFUN([gl_HAVE_POSIX_SPAWN], [ dnl Ensure to expand the default settings once only, before all statements dnl that occur in other macros. AC_REQUIRE([gl_SPAWN_H_DEFAULTS]) POSIX_SPAWN_LIB= AC_SUBST([POSIX_SPAWN_LIB]) gl_saved_libs=$LIBS AC_SEARCH_LIBS([posix_spawn], [rt], [test "$ac_cv_search_posix_spawn" = "none required" || POSIX_SPAWN_LIB=$ac_cv_search_posix_spawn]) gl_CHECK_FUNCS_ANDROID([posix_spawn], [[#include ]]) LIBS=$gl_saved_libs dnl For backward compatibility. LIB_POSIX_SPAWN="$POSIX_SPAWN_LIB" AC_SUBST([LIB_POSIX_SPAWN]) if test $ac_cv_func_posix_spawn != yes; then HAVE_POSIX_SPAWN=0 case "$gl_cv_onwards_func_posix_spawn" in future*) REPLACE_POSIX_SPAWN=1 ;; esac fi ]) # gl_SPAWN_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_SPAWN_MODULE_INDICATOR], [ dnl Ensure to expand the default settings once only. gl_SPAWN_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_SPAWN_H_REQUIRE_DEFAULTS], [ m4_defun(GL_MODULE_INDICATOR_PREFIX[_SPAWN_H_MODULE_INDICATOR_DEFAULTS], [ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWN]) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNP]) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWN_FILE_ACTIONS_INIT]) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR]) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWN_FILE_ACTIONS_ADDCLOSE]) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWN_FILE_ACTIONS_ADDDUP2]) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWN_FILE_ACTIONS_ADDFCHDIR]) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWN_FILE_ACTIONS_ADDOPEN]) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWN_FILE_ACTIONS_DESTROY]) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_INIT]) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_GETFLAGS]) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_SETFLAGS]) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_GETPGROUP]) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_SETPGROUP]) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_GETSCHEDPARAM]) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_SETSCHEDPARAM]) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_GETSCHEDPOLICY]) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_SETSCHEDPOLICY]) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_GETSIGDEFAULT]) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_SETSIGDEFAULT]) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_GETSIGMASK]) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_SETSIGMASK]) gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_POSIX_SPAWNATTR_DESTROY]) ]) m4_require(GL_MODULE_INDICATOR_PREFIX[_SPAWN_H_MODULE_INDICATOR_DEFAULTS]) AC_REQUIRE([gl_SPAWN_H_DEFAULTS]) ]) AC_DEFUN([gl_SPAWN_H_DEFAULTS], [ dnl Assume proper GNU behavior unless another module says otherwise. HAVE_POSIX_SPAWN=1; AC_SUBST([HAVE_POSIX_SPAWN]) HAVE_POSIX_SPAWNATTR_T=1; AC_SUBST([HAVE_POSIX_SPAWNATTR_T]) HAVE_POSIX_SPAWN_FILE_ACTIONS_T=1; AC_SUBST([HAVE_POSIX_SPAWN_FILE_ACTIONS_T]) HAVE_POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR=1; AC_SUBST([HAVE_POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR]) HAVE_POSIX_SPAWN_FILE_ACTIONS_ADDFCHDIR=1; AC_SUBST([HAVE_POSIX_SPAWN_FILE_ACTIONS_ADDFCHDIR]) REPLACE_POSIX_SPAWN=0; AC_SUBST([REPLACE_POSIX_SPAWN]) REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR=0; AC_SUBST([REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR]) REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDCLOSE=0; AC_SUBST([REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDCLOSE]) REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDDUP2=0; AC_SUBST([REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDDUP2]) REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDFCHDIR=0; AC_SUBST([REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDFCHDIR]) REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDOPEN=0; AC_SUBST([REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDOPEN]) ])