bootstrap gcc still not thread-smart -- the details

[Khem Raj]

You need to have thread support in bootstrap GCC to compile NPTL
--enable-threads=posix is the option you should add to your configure 
command and remove --enable-threads and you dont need the newlib options 
if you are compiling glibc.

Robert P. J. Day wrote:

>   ok, based on mike's advice so far, here's the story.  first, the
>sample source file mike sent to try to compile:
>
>extern __thread int i;
>
>int main() {
>
>  return 0;
>}
>
>  after i build my bootstrap gcc, here's the result (running from
>within the gcc-core-prefix directory):
>
>$ ./*gcc -c /tmp/thread.c
>/tmp/thread.c:1: error: thread-local storage not supported for this
>target
>
>  ok, so now we know i don't have thread support.  here's the stage of
>my script that builds the bootstrap gcc:
>
>        cd ${BUILD_DIR}/build-gcc-core
>        ${GCC_SRC_DIR}/configure \
>                --host=${HOST} \
>                --target=${TARGET} \
>                --prefix=${CORE_PREFIX} \
>                --with-local-prefix=${SYSROOT_DIR} \
>                --with-sysroot=${SYSROOT_DIR} \
>                --without-headers \
>                --without-libs \
>                --disable-multilib \
>                --with-newlib \
>                --disable-nls \
>                --disable-shared \
>                --enable-threads \
>                --enable-symvers=gnu \
>                --disable-__cxa_atexit \
>                --enable-languages=c
>
>        make all-gcc install-gcc
>
>and here's the bootstrap gcc and its build options:
>
>Using built-in specs.
>Target: sh3eb-unknown-linux-gnu
>Configured with: /home/rpjday/unpack/gcc-4.0.2/configure
>--host=i686-pc-linux-gnu --target=sh3eb-unknown-linux-gnu
>--prefix=/home/rpjday/results/sh3eb/build/gcc-core-prefix
>--with-local-prefix=/home/rpjday/results/sh3eb/tools/sh3eb-unknown-linux-gnu/sys-root
>--with-sysroot=/home/rpjday/results/sh3eb/tools/sh3eb-unknown-linux-gnu/sys-root
>--without-headers --without-libs --disable-multilib --with-newlib
>--disable-nls --disable-shared --enable-threads --enable-symvers=gnu
>--disable-__cxa_atexit --enable-languages=c
>Thread model: posix
>gcc version 4.0.2
>
>
>  i really don't know as much about threads as i would like so it may
>be that there's something obviously stupid about what i've done.  is
>"posix" the right thread model for the bootstrap gcc?  have i missed a
>critical option somewhere?
>
>  sorry to drag this out but i *really* want to get this working.
>
>rday
>
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>  
>

-- 
Khem Raj <kraj@mvista.com>
MontaVista Software, Inc.
www.mvista.com


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