diff options
Diffstat (limited to 'm4/spawn_h.m4')
| -rw-r--r-- | m4/spawn_h.m4 | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/m4/spawn_h.m4 b/m4/spawn_h.m4 new file mode 100644 index 0000000..1b28d80 --- /dev/null +++ b/m4/spawn_h.m4 @@ -0,0 +1,151 @@ +# spawn_h.m4 serial 21 +dnl Copyright (C) 2008-2022 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. + +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 <spawn.h> is always overridden, because of GNULIB_POSIXCHECK. + gl_CHECK_NEXT_HEADERS([spawn.h]) + + if test $ac_cv_header_spawn_h = yes; then + HAVE_SPAWN_H=1 + AC_CHECK_TYPES([posix_spawnattr_t], [], [HAVE_POSIX_SPAWNATTR_T=0], [[ +#include <spawn.h> + ]]) + AC_CHECK_TYPES([posix_spawn_file_actions_t], [], + [HAVE_POSIX_SPAWN_FILE_ACTIONS_T=0], [[ +#include <spawn.h> + ]]) + else + HAVE_SPAWN_H=0 + HAVE_POSIX_SPAWNATTR_T=0 + HAVE_POSIX_SPAWN_FILE_ACTIONS_T=0 + fi + AC_SUBST([HAVE_SPAWN_H]) + + dnl Ensure the type pid_t gets defined. + AC_REQUIRE([AC_TYPE_PID_T]) + + dnl Ensure the type mode_t gets defined. + AC_REQUIRE([AC_TYPE_MODE_T]) + + AC_REQUIRE([gl_HAVE_POSIX_SPAWN]) + + AC_REQUIRE([AC_C_RESTRICT]) + + dnl Check for declarations of anything we want to poison if the + dnl corresponding gnulib module is not in use. + gl_WARN_ON_USE_PREPARE([[#include <spawn.h> + ]], [posix_spawn posix_spawnp posix_spawnattr_init posix_spawnattr_destroy + posix_spawnattr_getsigdefault posix_spawnattr_setsigdefault + posix_spawnattr_getsigmask posix_spawnattr_setsigmask + posix_spawnattr_getflags posix_spawnattr_setflags + posix_spawnattr_getpgroup posix_spawnattr_setpgroup + posix_spawnattr_getschedpolicy posix_spawnattr_setschedpolicy + posix_spawnattr_getschedparam posix_spawnattr_setschedparam + posix_spawn_file_actions_init posix_spawn_file_actions_destroy + posix_spawn_file_actions_addopen posix_spawn_file_actions_addclose + posix_spawn_file_actions_adddup2 posix_spawn_file_actions_addchdir + posix_spawn_file_actions_addfchdir]) +]) + +dnl Checks whether the system has the functions posix_spawn. +dnl Sets ac_cv_func_posix_spawn and HAVE_POSIX_SPAWN. +AC_DEFUN([gl_HAVE_POSIX_SPAWN], +[ + dnl Ensure to expand the default settings once only, before all statements + dnl that occur in other macros. + AC_REQUIRE([gl_SPAWN_H_DEFAULTS]) + + LIB_POSIX_SPAWN= + AC_SUBST([LIB_POSIX_SPAWN]) + gl_saved_libs=$LIBS + AC_SEARCH_LIBS([posix_spawn], [rt], + [test "$ac_cv_search_posix_spawn" = "none required" || + LIB_POSIX_SPAWN=$ac_cv_search_posix_spawn]) + AC_CHECK_FUNCS([posix_spawn]) + LIBS=$gl_saved_libs + + if test $ac_cv_func_posix_spawn != yes; then + HAVE_POSIX_SPAWN=0 + 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]) +]) |