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# pthread_sigmask.m4 serial 7-emacs1
dnl Copyright (C) 2011 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_FUNC_PTHREAD_SIGMASK],
[
AC_CHECK_FUNCS_ONCE([pthread_sigmask])
LIB_PTHREAD_SIGMASK=
dnl gl_THREADLIB is not in use. Assume the application wants
dnl POSIX semantics.
if test $ac_cv_func_pthread_sigmask != yes; then
gl_save_LIBS=$LIBS
AC_SEARCH_LIBS([pthread_sigmask], [pthread c_r])
LIBS=$gl_save_LIBS
if test "$ac_cv_search_pthread_sigmask" = no; then
HAVE_PTHREAD_SIGMASK=0
elif test "$ac_cv_search_pthread_sigmask" != 'none required'; then
LIB_PTHREAD_SIGMASK=$ac_cv_search_pthread_sigmask
fi
fi
AC_SUBST([LIB_PTHREAD_SIGMASK])
dnl We don't need a variable LTLIB_PTHREAD_SIGMASK, because when
dnl "$gl_threads_api" = posix, $LTLIBMULTITHREAD and $LIBMULTITHREAD are the
dnl same: either both empty or both "-lpthread".
])
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