Hi Stephen, to build NPTL, you need to apply contrib/crosstool-0.28-rc34-nptl_fixes.patch Then see demo-x86_64-nptl.sh
Enough people need this that I've been intending for two weeks to merge it asap, but I haven't gotten around to it. That patch was only tested for x86, but ppc32 shouldn't be any harder, right? :-) - Dan Stephen Warren wrote: > Hi. I'm attempting to use your crosstool to build a NPTL capable GLIBC > and toolchain for a 32-bit PowerPC target. > > I'm finding it very difficult to find information on which libc, kernel, > compiler and binutils versions are required for this. > > Can you point me to any information that'll tell me definitively which > software versions support this, or at any mailing lists that are > appropriate for this kind of question? I tried > linuxppc-embedded at ozlabs.org (see attached email) but didn't hear > anything back. > > Thanks for any pointers at all! > > > > ------------------------------------------------------------------------ > > Subject: > NPTL support on PPC32 (MPC5200) ? > From: > "Stephen Warren" <SWarren at nvidia.com> > Date: > Fri, 8 Oct 2004 09:26:22 -0700 > To: > <linuxppc-embedded at ozlabs.org> > > To: > <linuxppc-embedded at ozlabs.org> > > > Hello everyone. > > I'm trying to run a fairly heavily multi-threaded application on the > Motorola/Freescale MPC5200 platform. So far, we're having a few > performance problems. Freescale has profiled the application using > strace and shown that a lot of our CPU time goes into executing the kill > and rt_sigsuspend system calls, which we understand are used in the > implementation of the threading library. > > So, I figured I'd see if NPTL (Native Posix Threads Library) would help > us out at all. I found and attempted to use a utility named crosstool > (0.28-rc37) from http://kegel.com/crosstool/ to build a new toolchain > supporting this. > > I made a few changes to crosstool.sh in an attempt to request NPTL. > These are shown later in the email. > > However, I'm getting an error from the configure of glibc: > > ... > /home/swarren/src/crosstool-0.28-rc37/build/powerpc-603e-linux-gnu/gcc-3 > .4-20041001-glibc-20041004/glibc-20041004/configure --prefix=/usr > --build=i686-pc-linux-gnu --host=powerpc-603e-linux-gnu > --enable-kernel=2.4.24 --without-cvs --without-gd --with-tls > --with-__thread --enable-shared --enable-add-ons=nptl > --with-headers=/usr/local/ppc_82xx/powerpc-603e-linux-gnu/gcc-3.4-200410 > 01-glibc-20041004/powerpc-603e-linux-gnu/include > ... > running configure fragment for nptl/sysdeps/pthread > checking for forced unwind support... no > configure: error: forced unwind support is required > > I've tried various combinations of: > > gcc-3.4.2 (release) > gcc-3.4-20041001 (10/01 snapshot) > glibc-2.3.3 (release) > glibc-20041004 (10/04 snapshot) > binutils-2.15 (release) > binutils-041007) (10/07 snapshot) > kernel 2.4.24 (release) > kernel 2.6.8 (release) > > My question is - can anybody tell me, or point me at a website that > definitively tells me: > > 1) Is NPTL available on PPC at all? I assume so, since I found one of > the original announcement of NPTL, which mentions performance on a large > SMP PPC system. > > 2) Which kernels have the required support for NPTL - I believe 2.6.x > does. I know RedHat back-ported it to their 2.4.x kernels for RedHat 9 > (at least x86). Did it get back-ported into any official 2.4.x kernel, > such as the 2.4.24 I tried? > > 3) Which glibc and gcc do I need. I found webpages that indicate gcc >= > 3.4.x is required for toolchain thread/TLS support, and NPTL is part of > glibc >= 2.3.x. > > 4) Which binutils should work? > > 5) Am I missing some configure options for glibc? Or, binutils or gcc? > > So far, I'm downloading all GNU tools from gnu.org, or a mirror, and > kernels from kernel.org. Should I try PPC-specific branches for any of > this? > > Note: I'd really like 2.4.x support if it's available - I need a > DMA-enabled IDE driver for the MPC5200, and so far, all I have is a > patched 2.4.24 directly from Freescale (which apparently they're working > on integrating back into the kernel at www.denx.de) Eventually, we > intend to use a Montavista-based system. We were using MV Linux 3.0 > (before we hit problems with IDE DMA) which uses kernel 2.4.18. > > Thanks for any help, or pointers to good resources. I spent most of > yesterday googling and trying out different gcc/glibc/kernel > combinations, and couldn't get past this. > > Modifications I made to crosstool.sh to request NPTL: > > (Note that if I remove just the second part of this patch, it all builds > fine, but using the old Linuxthreads instead of NPTL) > > =============================================================== > [swarren at swarren-linux crosstool-0.28-rc37]$ diff crosstool.sh.orig > crosstool.sh > 365,367c365,367 > < --enable-kernel=2.4.3 \ > < --without-cvs --disable-profile --disable-debug --without-gd \ > < --without-tls --without-__thread \ > --- > >> --enable-kernel=2.4.24 \ >> --without-cvs --without-gd \ >> --with-tls --with-__thread \ > > 369c369 > < --enable-add-ons${GLIBC_ADDON_OPTIONS} > --with-headers=$HEADERDIR > --- > >> --enable-add-ons=nptl --with-headers=$HEADERDIR > > =============================================================== > > I created my own top-level build script and .dat files based upon the > existing ones: > > =============================================================== > [swarren at swarren-linux crosstool-0.28-rc37]$ cat demo-ppc603e.sh > #!/bin/sh > set -ex > TARBALLS_DIR=$HOME/archive > RESULT_TOP=/usr/local/ppc_82xx > export TARBALLS_DIR RESULT_TOP > GCC_LANGUAGES="c,c++" > export GCC_LANGUAGES > > # Really, you should do the mkdir before running this, > # and chown /opt/crosstool to yourself so you don't need to run as root. > mkdir -p $RESULT_TOP > > # Build the toolchain. Takes a couple hours and a couple gigabytes. > eval `cat powerpc-603e.dat gcc-3.4-20041001-glibc-20041004.dat` sh > all.sh --notest > > echo Done. > =============================================================== > > =============================================================== > [swarren at swarren-linux crosstool-0.28-rc37]$ cat > gcc-3.4-20041001-glibc-20041004.dat > BINUTILS_DIR=binutils-2.15 > GCC_DIR=gcc-3.4-20041001 > GLIBC_DIR=glibc-20041004 > LINUX_DIR=linux-2.6.8 > =============================================================== > -- Know a student in Los Angeles who wants a job doing C++ on Linux? Send him/her to http://kegel.com/academy
