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- # Copyright (C) 2003 Free Software Foundation, Inc.
- # This file is part of the GNU C Library.
- # Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
- # The GNU C Library is free software; you can redistribute it and/or
- # modify it under the terms of the GNU Lesser General Public
- # License as published by the Free Software Foundation; either
- # version 2.1 of the License, or (at your option) any later version.
- # The GNU C Library is distributed in the hope that it will be useful,
- # but WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- # Lesser General Public License for more details.
- # You should have received a copy of the GNU Lesser General Public
- # License along with the GNU C Library; if not, write to the Free
- # Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- # 02111-1307 USA.
- ifeq ($(subdir),nptl)
- # It turns out that stack coloring is in general not good on P4s. Some
- # applications will benefit. We will probably have a configuration option
- # at some point. Enabling coloring can be done with
- #
- # -DCOLORING_INCREMENT=128
- #
- # What is useful is to avoid the 64k aliasing problem which reliably
- # happens if all stacks use sizes which are a multiple of 64k. Tell
- # the stack allocator to disturb this by allocation one more page if
- # necessary.
- CFLAGS-pthread_create.c += -DMULTI_PAGE_ALIASING=65536
- endif
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