Re: Help with using multilib for Cilk Library

["H.J. Lu" <hjl dot tools at gmail dot com>]

On Mon, Jul 22, 2013 at 9:27 AM, Iyer, Balaji V <balaji.v.iyer@intel.com> wrote:
>
>
>> -----Original Message-----
>> From: H.J. Lu [mailto:hjl.tools@gmail.com]
>> Sent: Friday, July 19, 2013 6:56 PM
>> To: Iyer, Balaji V
>> Cc: Ian Lance Taylor; gcc@gcc.gnu.org
>> Subject: Re: Help with using multilib for Cilk Library
>>
>> On Fri, Jul 19, 2013 at 3:53 PM, Iyer, Balaji V <balaji.v.iyer@intel.com> wrote:
>> >
>> >
>> >> -----Original Message-----
>> >> From: Ian Lance Taylor [mailto:iant@google.com]
>> >> Sent: Friday, July 19, 2013 6:26 PM
>> >> To: Iyer, Balaji V
>> >> Cc: gcc@gcc.gnu.org
>> >> Subject: Re: Help with using multilib for Cilk Library
>> >>
>> >> On Fri, Jul 19, 2013 at 11:22 AM, Iyer, Balaji V <balaji.v.iyer@intel.com>
>> wrote:
>> >> > Hello Everyone,
>> >> >         I am trying to use Multilib on Cilk Library. I looked at
>> >> > this website
>> >> (http://www.airs.com/ian/configure/configure_8.html) and used
>> >> libsanitizer and libgo as samples to model after. It is currently
>> >> failing with the following error
>> >> message:
>> >> >
>> >> > libtool: link: /export/users/my-files/b-gcc-multilib/./gcc/xg++ -
>> >> B/export/users/my-files/b-gcc-multilib/./gcc/ -nostdinc++ -nostdinc++
>> >> -
>> >> I/export/users/my-files/b-gcc-multilib/x86_64-unknown-linux-gnu/32/li
>> >> bstdc++- v3/include/x86_64-unknown-linux-gnu
>> >> -I/export/users/my-files/b-gcc-
>> >> multilib/x86_64-unknown-linux-gnu/32/libstdc++-v3/include -
>> >> I/export/users/my-files/gcc/libstdc++-v3/libsupc++
>> >> -I/export/users/my- files/gcc/libstdc++-v3/include/backward
>> >> -I/export/users/my-files/gcc/libstdc++-
>> >> v3/testsuite/util
>> >> -L/export/users/my-files/b-gcc-multilib/x86_64-unknown-linux-
>> >> gnu/32/libstdc++-v3/src
>> >> -L/export/users/my-files/b-gcc-multilib/x86_64-
>> >> unknown-linux-gnu/32/libstdc++-v3/src/.libs
>> >> -B/export/users/my-files/install-
>> >> gcc-multilib/x86_64-unknown-linux-gnu/bin/
>> >> -B/export/users/my-files/install-
>> >> gcc-multilib/x86_64-unknown-linux-gnu/lib/ -isystem /export/users/my-
>> >> files/install-gcc-multilib/x86_64-unknown-linux-gnu/include -isystem
>> >> /export/users/my-files/install-gcc-multilib/x86_64-unknown-linux-gnu/
>> >> sys- include  -m32 -shared -nostdlib /usr/lib/../lib/crti.o
>> >> /export/users/my-files/b- gcc-multilib/./gcc/32/crtbeginS.o
>> >> .libs/bug.o .libs/cilk-abi.o .libs/cilk-abi-cilk- for.o
>> >> .libs/cilk-abi-vla.o .libs/cilk-abi-vla-internal.o .libs/cilk_api.o
>> >> .libs/cilk_fiber.o .libs/cilk_fiber-unix.o .libs/cilk_malloc.o
>> >> .libs/c_reducers.o .libs/except-gcc.o .libs/frame_malloc.o
>> >> .libs/full_frame.o .libs/global_state.o .libs/jmpbuf.o
>> >> .libs/local_state.o .libs/metacall_impl.o .libs/os_mutex-unix.o
>> >> .libs/os-unix.o .libs/pedigrees.o .libs/record-replay.o .libs/reducer_impl.o
>> .libs/scheduler.o .libs/signal_node.o .libs/spin_mutex.o .libs/stats.o
>> >> .libs/symbol_test.o .libs/sysdep-unix.o .libs/worker_mutex.o   -Wl,-rpath -
>> >> Wl,/export/users/my-files/b-gcc-multilib/x86_64-unknown-linux-gnu/lib
>> >> stdc++- v3/src/.libs -Wl,-rpath
>> >> -Wl,/export/users/my-files/install-gcc-multilib/lib/../lib64
>> >> -L/export/users/my-files/b-gcc-multilib/x86_64-unknown-linux-gnu/libs
>> >> tdc++- v3/src/.libs
>> >> -L/export/users/my-files/b-gcc-multilib/x86_64-unknown-linux-
>> >> gnu/libstdc++-v3/src -lpthread -ldl -L/export/users/my-files/b-gcc-
>> >> multilib/x86_64-unknown-linux-gnu/32/libstdc++-v3/src
>> >> -L/export/users/my-
>> >> files/b-gcc-multilib/x86_64-unknown-linux-gnu/32/libstdc++-v3/src/.li
>> >> bs -
>> >> L/export/users/my-files/b-gcc-multilib/./gcc/32 -L/lib/../lib
>> >> -L/usr/lib/../lib - L/export/users/my-files/b-gcc-multilib/./gcc
>> >> /export/users/my-files/b-gcc-
>> >> multilib/x86_64-unknown-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so -lm -lc
>> - lgcc_s /export/users/my-files/b-gcc-multilib/./gcc/32/crtendS.o
>> >> /usr/lib/../lib/crtn.o  -m32 -m32   -Wl,-soname -Wl,libcilkrts.so.5 -o
>> >> .libs/libcilkrts.so.5.0.3511
>> >> > /export/users/my-files/b-gcc-multilib/x86_64-unknown-linux-gnu/libs
>> >> > tdc
>> >> > ++-v3/src/.libs/libstdc++.so: could not read symbols: File in wrong
>> >> > format
>> >> > collect2: error: ld returned 1 exit status
>> >> > make[4]: *** [libcilkrts.la] Error 1
>> >> > make[4]: Leaving directory
>> >> > `/export/users/my-files/b-gcc-multilib/x86_64-
>> >> unknown-linux-gnu/32/libcilkrts'
>> >> > make[3]: *** [multi-do] Error 1
>> >> > make[3]: Leaving directory `/export/users/my-files/b-gcc
>> >> >
>> >> >
>> >> > From what it looks like, it is reading the 64 bit library for the
>> >> > 32 bit mode (or
>> >> vice-versa). How do I fix this? I am also attaching my configure.ac
>> >> and Makefile.am. Please note that it is not fully cleaned up (e.g. I
>> >> have stuff commented out etc). Can someone please tell me what I am doing
>> wrong?
>> >>
>> >> When building the 32bit libcillkrts you are linking against the
>> >> 64-bit
>> >> libstdc++.  It's right there on your command line:
>> >> /export/users/my-files/b-gcc-multilib/x86_64-unknown-linux-gnu/libstd
>> >> c++-
>> >> v3/src/.libs/libstdc++.so.
>> >>  If that argument is needed at all, it needs to be
>> >> /export/users/my-files/b-gcc-
>> >> multilib/x86_64-unknown-linux-gnu/32/libstdc++-v3/src/.libs/libstdc++
>> >> .so (note added /32 in there).  I guess the question is where the
>> >> argument is coming from.  I must admit that I don't know.  Is it in
>> >> some environment variable?
>> >
>> > I am not setting any environment variable that weren't set automatically in my
>> SUSE machine. Also, all the other libs are working correctly for 32 and 64 bit.
>> >
>>
>> If you can create a git branch, others can take a look to see what is going on.
>> There isn't sufficient info to tell.
>
> Hello H. J. and Ian,
>         I have posted what I have in bviyer/cilkplus-multilib-test. To build the compiler, I used the following configure command:
>
> ../cilkplus-multilib-test/configure --prefix=<INSTALL_DIR>
>
> Any help is greatly appreciated!
>
> Thanks,
>
> Balaji V. Iyer.

Here is a patch:

1. Add target dependency on C++ for parallel build.
2. Remove hardcoded -O3 -fpic. libtool takes care of it.
3. Work around MAKEFLAGS for multilib build.


--
H.J.

Attachment: libcilkrts.patch
Description: Binary data