summaryrefslogtreecommitdiff
path: root/gnulib-m4/pthread_sigmask.m4
diff options
context:
space:
mode:
authorJörg Frings-Fürst <debian@jff.email>2022-01-08 11:51:07 +0100
committerJörg Frings-Fürst <debian@jff.email>2022-01-08 11:51:07 +0100
commitbe8efac78d067c138ad8dda03df4336e73f94887 (patch)
tree5f5254a628ba0ef72065b93d949d1c985742ea8e /gnulib-m4/pthread_sigmask.m4
parent7b65dbd4ebade81d504cfe5e681292a58ad1fdf0 (diff)
New upstream version 1.0upstream/1.0
Diffstat (limited to 'gnulib-m4/pthread_sigmask.m4')
-rw-r--r--gnulib-m4/pthread_sigmask.m4215
1 files changed, 105 insertions, 110 deletions
diff --git a/gnulib-m4/pthread_sigmask.m4 b/gnulib-m4/pthread_sigmask.m4
index a33b433..0aa8c53 100644
--- a/gnulib-m4/pthread_sigmask.m4
+++ b/gnulib-m4/pthread_sigmask.m4
@@ -1,5 +1,5 @@
-# pthread_sigmask.m4 serial 16
-dnl Copyright (C) 2011-2018 Free Software Foundation, Inc.
+# pthread_sigmask.m4 serial 21
+dnl Copyright (C) 2011-2022 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.
@@ -9,103 +9,97 @@ AC_DEFUN([gl_FUNC_PTHREAD_SIGMASK],
AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
AC_CHECK_FUNCS_ONCE([pthread_sigmask])
+
+ dnl On MinGW pthread_sigmask is just a macro which always returns 0.
+ dnl It does not exist as a real function, which is required by POSIX.
+ AC_CACHE_CHECK([whether pthread_sigmask is a macro],
+ [gl_cv_func_pthread_sigmask_macro],
+ [AC_EGREP_CPP([headers_define_pthread_sigmask], [
+#include <pthread.h>
+#include <signal.h>
+#ifdef pthread_sigmask
+ headers_define_pthread_sigmask
+#endif],
+ [gl_cv_func_pthread_sigmask_macro=yes],
+ [gl_cv_func_pthread_sigmask_macro=no])
+ ])
+
LIB_PTHREAD_SIGMASK=
- dnl Test whether the gnulib module 'threadlib' is in use.
- dnl Some packages like Emacs use --avoid=threadlib.
- dnl Write the symbol in such a way that it does not cause 'aclocal' to pick
- dnl the threadlib.m4 file that is installed in $PREFIX/share/aclocal/.
- m4_ifdef([gl_][THREADLIB], [
- AC_REQUIRE([gl_][THREADLIB])
+ if test $gl_cv_func_pthread_sigmask_macro = yes; then
+ dnl pthread_sigmask is a dummy macro.
+ HAVE_PTHREAD_SIGMASK=0
+ dnl Make sure to '#undef pthread_sigmask' before defining it.
+ REPLACE_PTHREAD_SIGMASK=1
+ else
+ dnl Test whether the gnulib module 'threadlib' is in use.
+ dnl Some packages like Emacs use --avoid=threadlib.
+ dnl Write the symbol in such a way that it does not cause 'aclocal' to pick
+ dnl the threadlib.m4 file that is installed in $PREFIX/share/aclocal/.
+ m4_ifdef([gl_][THREADLIB], [
+ AC_REQUIRE([gl_][THREADLIB])
- if test "$gl_threads_api" = posix; then
- if test $ac_cv_func_pthread_sigmask = yes; then
- dnl pthread_sigmask is available without -lpthread.
- :
- else
- if test -n "$LIBMULTITHREAD"; then
- AC_CACHE_CHECK([for pthread_sigmask in $LIBMULTITHREAD],
- [gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD],
- [gl_save_LIBS="$LIBS"
- LIBS="$LIBS $LIBMULTITHREAD"
- AC_LINK_IFELSE(
- [AC_LANG_PROGRAM(
- [[#include <pthread.h>
- #include <signal.h>
- ]],
- [[return pthread_sigmask (0, (sigset_t *) 0, (sigset_t *) 0);]])
- ],
- [gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD=yes],
- [gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD=no])
- LIBS="$gl_save_LIBS"
- ])
- if test $gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD = yes; then
- AC_CACHE_CHECK([whether pthread_sigmask is only a macro],
- [gl_cv_func_pthread_sigmask_is_macro],
+ if test "$gl_threads_api" = posix; then
+ if test $ac_cv_func_pthread_sigmask = yes; then
+ dnl pthread_sigmask is available without -lpthread.
+ :
+ else
+ if test -n "$LIBMULTITHREAD"; then
+ AC_CACHE_CHECK([for pthread_sigmask in $LIBMULTITHREAD],
+ [gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD],
[gl_save_LIBS="$LIBS"
LIBS="$LIBS $LIBMULTITHREAD"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[[#include <pthread.h>
#include <signal.h>
- #undef pthread_sigmask
]],
[[return pthread_sigmask (0, (sigset_t *) 0, (sigset_t *) 0);]])
],
- [gl_cv_func_pthread_sigmask_is_macro=no],
- [gl_cv_func_pthread_sigmask_is_macro=yes])
+ [gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD=yes],
+ [gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD=no])
LIBS="$gl_save_LIBS"
])
- if test $gl_cv_func_pthread_sigmask_is_macro = yes; then
- dnl On MinGW pthread_sigmask is just a macro which always returns 0.
- dnl It does not exist as a real function, which is required by POSIX.
- REPLACE_PTHREAD_SIGMASK=1
- gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD=no
+ if test $gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD = yes; then
+ dnl pthread_sigmask is available with -pthread or -lpthread.
+ LIB_PTHREAD_SIGMASK="$LIBMULTITHREAD"
+ else
+ dnl pthread_sigmask is not available at all.
+ HAVE_PTHREAD_SIGMASK=0
fi
- fi
- if test $gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD = yes; then
- dnl pthread_sigmask is available with -pthread or -lpthread.
- LIB_PTHREAD_SIGMASK="$LIBMULTITHREAD"
else
dnl pthread_sigmask is not available at all.
HAVE_PTHREAD_SIGMASK=0
fi
+ fi
+ else
+ dnl pthread_sigmask may exist but does not interoperate with the chosen
+ dnl multithreading facility.
+ if test $ac_cv_func_pthread_sigmask = yes; then
+ REPLACE_PTHREAD_SIGMASK=1
else
- dnl pthread_sigmask is not available at all.
HAVE_PTHREAD_SIGMASK=0
fi
fi
- else
- dnl pthread_sigmask may exist but does not interoperate with the chosen
- dnl multithreading facility.
- dnl If "$gl_threads_api" = pth, we could use the function pth_sigmask,
- dnl but it is equivalent to sigprocmask, so we choose to emulate
- dnl pthread_sigmask with sigprocmask also in this case. This yields fewer
- dnl link dependencies.
+ ], [
+ dnl The module 'threadlib' is not in use, due to --avoid=threadlib being
+ dnl specified.
+ dnl The package either has prepared CPPFLAGS and LIBS for use of
+ dnl POSIX:2008 threads, or wants to build single-threaded programs.
if test $ac_cv_func_pthread_sigmask = yes; then
- REPLACE_PTHREAD_SIGMASK=1
+ dnl pthread_sigmask exists and does not require extra libraries.
+ dnl Assume that it is declared.
+ :
else
+ dnl pthread_sigmask either does not exist or needs extra libraries.
HAVE_PTHREAD_SIGMASK=0
+ dnl Define the symbol rpl_pthread_sigmask, not pthread_sigmask,
+ dnl so as to not accidentally override the system's pthread_sigmask
+ dnl symbol from libpthread. This is necessary on IRIX 6.5.
+ REPLACE_PTHREAD_SIGMASK=1
fi
- fi
- ], [
- dnl The module 'threadlib' is not in use, due to --avoid=threadlib being
- dnl specified.
- dnl The package either has prepared CPPFLAGS and LIBS for use of POSIX:2008
- dnl threads, or wants to build single-threaded programs.
- if test $ac_cv_func_pthread_sigmask = yes; then
- dnl pthread_sigmask exists and does not require extra libraries.
- dnl Assume that it is declared.
- :
- else
- dnl pthread_sigmask either does not exist or needs extra libraries.
- HAVE_PTHREAD_SIGMASK=0
- dnl Define the symbol rpl_pthread_sigmask, not pthread_sigmask,
- dnl so as to not accidentally override the system's pthread_sigmask
- dnl symbol from libpthread. This is necessary on IRIX 6.5.
- REPLACE_PTHREAD_SIGMASK=1
- fi
- ])
+ ])
+ fi
AC_SUBST([LIB_PTHREAD_SIGMASK])
dnl We don't need a variable LTLIB_PTHREAD_SIGMASK, because when
@@ -117,48 +111,48 @@ AC_DEFUN([gl_FUNC_PTHREAD_SIGMASK],
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
- dnl On FreeBSD 6.4, HP-UX 11.31, Solaris 9, in programs that are not linked
- dnl with -lpthread, the pthread_sigmask() function always returns 0 and has
- dnl no effect.
+ dnl On FreeBSD 13.0, MidnightBSD 1.1, HP-UX 11.31, Solaris 9, in programs
+ dnl that are not linked with -lpthread, the pthread_sigmask() function
+ dnl always returns 0 and has no effect.
if test -z "$LIB_PTHREAD_SIGMASK"; then
case " $LIBS " in
*' -pthread '*) ;;
*' -lpthread '*) ;;
- *)
- AC_CACHE_CHECK([whether pthread_sigmask works without -lpthread],
- [gl_cv_func_pthread_sigmask_in_libc_works],
- [
- AC_RUN_IFELSE(
- [AC_LANG_SOURCE([[
- #include <pthread.h>
- #include <signal.h>
- #include <stddef.h>
- int main ()
- {
- sigset_t set;
- sigemptyset (&set);
- return pthread_sigmask (1729, &set, NULL) != 0;
- }]])],
- [gl_cv_func_pthread_sigmask_in_libc_works=no],
- [gl_cv_func_pthread_sigmask_in_libc_works=yes],
- [
- changequote(,)dnl
- case "$host_os" in
- freebsd* | hpux* | solaris | solaris2.[2-9]*)
- gl_cv_func_pthread_sigmask_in_libc_works="guessing no";;
- *)
- gl_cv_func_pthread_sigmask_in_libc_works="guessing yes";;
- esac
- changequote([,])dnl
- ])
- ])
- case "$gl_cv_func_pthread_sigmask_in_libc_works" in
- *no)
- REPLACE_PTHREAD_SIGMASK=1
- AC_DEFINE([PTHREAD_SIGMASK_INEFFECTIVE], [1],
- [Define to 1 if pthread_sigmask may return 0 and have no effect.])
- ;;
- esac;;
+ *)
+ AC_CACHE_CHECK([whether pthread_sigmask works without -lpthread],
+ [gl_cv_func_pthread_sigmask_in_libc_works],
+ [
+ AC_RUN_IFELSE(
+ [AC_LANG_SOURCE([[
+ #include <pthread.h>
+ #include <signal.h>
+ #include <stddef.h>
+ int main ()
+ {
+ sigset_t set;
+ sigemptyset (&set);
+ return pthread_sigmask (1729, &set, NULL) != 0;
+ }]])],
+ [gl_cv_func_pthread_sigmask_in_libc_works=no],
+ [gl_cv_func_pthread_sigmask_in_libc_works=yes],
+ [
+ changequote(,)dnl
+ case "$host_os" in
+ freebsd* | midnightbsd* | hpux* | solaris | solaris2.[2-9]*)
+ gl_cv_func_pthread_sigmask_in_libc_works="guessing no";;
+ *)
+ gl_cv_func_pthread_sigmask_in_libc_works="guessing yes";;
+ esac
+ changequote([,])dnl
+ ])
+ ])
+ case "$gl_cv_func_pthread_sigmask_in_libc_works" in
+ *no)
+ REPLACE_PTHREAD_SIGMASK=1
+ AC_DEFINE([PTHREAD_SIGMASK_INEFFECTIVE], [1],
+ [Define to 1 if pthread_sigmask may return 0 and have no effect.])
+ ;;
+ esac;;
esac
fi
@@ -226,6 +220,7 @@ int main ()
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
+]GL_MDA_DEFINES[
static volatile int sigint_occurred;
static void
sigint_handler (int sig)