diff options
Diffstat (limited to 'gnulib-m4/signal_h.m4')
| -rw-r--r-- | gnulib-m4/signal_h.m4 | 37 |
1 files changed, 27 insertions, 10 deletions
diff --git a/gnulib-m4/signal_h.m4 b/gnulib-m4/signal_h.m4 index 394b91d3..4c05c627 100644 --- a/gnulib-m4/signal_h.m4 +++ b/gnulib-m4/signal_h.m4 @@ -1,10 +1,10 @@ -# signal_h.m4 serial 18 -dnl Copyright (C) 2007-2018 Free Software Foundation, Inc. +# signal_h.m4 serial 22 +dnl Copyright (C) 2007-2022 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. -AC_DEFUN([gl_SIGNAL_H], +AC_DEFUN_ONCE([gl_SIGNAL_H], [ AC_REQUIRE([gl_SIGNAL_H_DEFAULTS]) AC_REQUIRE([gl_CHECK_TYPE_SIGSET_T]) @@ -34,6 +34,8 @@ AC_DEFUN([gl_SIGNAL_H], ]], [pthread_sigmask sigaction sigaddset sigdelset sigemptyset sigfillset sigismember sigpending sigprocmask]) + + AC_REQUIRE([AC_C_RESTRICT]) ]) AC_DEFUN([gl_CHECK_TYPE_SIGSET_T], @@ -50,22 +52,37 @@ AC_DEFUN([gl_CHECK_TYPE_SIGSET_T], fi ]) +# gl_SIGNAL_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_SIGNAL_MODULE_INDICATOR], [ - dnl Use AC_REQUIRE here, so that the default settings are expanded once only. - AC_REQUIRE([gl_SIGNAL_H_DEFAULTS]) + dnl Ensure to expand the default settings once only. + gl_SIGNAL_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_SIGNAL_H_REQUIRE_DEFAULTS], +[ + m4_defun(GL_MODULE_INDICATOR_PREFIX[_SIGNAL_H_MODULE_INDICATOR_DEFAULTS], [ + gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_PTHREAD_SIGMASK]) + gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_RAISE]) + gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SIGNAL_H_SIGPIPE]) + gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SIGPROCMASK]) + gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SIGACTION]) + ]) + m4_require(GL_MODULE_INDICATOR_PREFIX[_SIGNAL_H_MODULE_INDICATOR_DEFAULTS]) + AC_REQUIRE([gl_SIGNAL_H_DEFAULTS]) +]) + AC_DEFUN([gl_SIGNAL_H_DEFAULTS], [ - GNULIB_PTHREAD_SIGMASK=0; AC_SUBST([GNULIB_PTHREAD_SIGMASK]) - GNULIB_RAISE=0; AC_SUBST([GNULIB_RAISE]) - GNULIB_SIGNAL_H_SIGPIPE=0; AC_SUBST([GNULIB_SIGNAL_H_SIGPIPE]) - GNULIB_SIGPROCMASK=0; AC_SUBST([GNULIB_SIGPROCMASK]) - GNULIB_SIGACTION=0; AC_SUBST([GNULIB_SIGACTION]) dnl Assume proper GNU behavior unless another module says otherwise. HAVE_POSIX_SIGNALBLOCKING=1; AC_SUBST([HAVE_POSIX_SIGNALBLOCKING]) HAVE_PTHREAD_SIGMASK=1; AC_SUBST([HAVE_PTHREAD_SIGMASK]) |