code.delx.au - gnu-emacs/blob - m4/pthread_sigmask.m4

   1 # pthread_sigmask.m4 serial 7-emacs1
   2 dnl Copyright (C) 2011 Free Software Foundation, Inc.
   3 dnl This file is free software; the Free Software Foundation
   4 dnl gives unlimited permission to copy and/or distribute it,
   5 dnl with or without modifications, as long as this notice is preserved.
   6
   7 AC_DEFUN([gl_FUNC_PTHREAD_SIGMASK],
   8 [
   9   AC_CHECK_FUNCS_ONCE([pthread_sigmask])
  10   LIB_PTHREAD_SIGMASK=
  11     dnl gl_THREADLIB is not in use.  Assume the application wants
  12     dnl POSIX semantics.
  13     if test $ac_cv_func_pthread_sigmask != yes; then
  14       gl_save_LIBS=$LIBS
  15       AC_SEARCH_LIBS([pthread_sigmask], [pthread c_r])
  16       LIBS=$gl_save_LIBS
  17       if test "$ac_cv_search_pthread_sigmask" = no; then
  18         HAVE_PTHREAD_SIGMASK=0
  19       elif test "$ac_cv_search_pthread_sigmask" != 'none required'; then
  20         LIB_PTHREAD_SIGMASK=$ac_cv_search_pthread_sigmask
  21       fi
  22     fi
  23   AC_SUBST([LIB_PTHREAD_SIGMASK])
  24   dnl We don't need a variable LTLIB_PTHREAD_SIGMASK, because when
  25   dnl "$gl_threads_api" = posix, $LTLIBMULTITHREAD and $LIBMULTITHREAD are the
  26   dnl same: either both empty or both "-lpthread".
  27 ])