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Re: adding NPTL support to the toolchain build process


On Wed, Nov 09, 2005 at 09:02:02AM -0500, Robert P. J. Day wrote:
>   that is, where to add --enable-threads, --with-__thread and so on?
> i'm sure i'm just missing a critical option somewhere.  thanks.

find attached a simple .c file to test your gcc ... just run
<your gcc> -c test-__thread.c

if your gcc is new enough for the target, it should work regardless, but if it 
isnt, you'll get an error like:
test-__thread.c:1: error: thread-local storage not supported for this target

the --disable-threads option in gcc shouldnt matter ... for example, consider 
gcc-3.4.4 for arm and sparc targets ... the arm toolchain is a 'full' 
toolchain as in it supports threads/C/C++/etc... while the sparc toolchain is 
a stage1 as in it does not support threads, just C since it lacks a libc still

$ arm-softfloat-linux-uclibc-gcc -c test-__thread.c
test-__thread.c:1: error: thread-local storage not supported for this target
$ arm-softfloat-linux-uclibc-gcc -v
Configured with: 
/var/tmp/cross/arm-softfloat-linux-uclibc/portage/gcc-3.4.4-r1/work/gcc-3.4.4/configure 
--prefix=/usr --bindir=/usr/arm-softfloat-linux-uclibc/gcc-bin/3.4.4 
--includedir=/usr/lib/gcc/arm-softfloat-linux-uclibc/3.4.4/include 
--datadir=/usr/share/gcc-data/arm-softfloat-linux-uclibc/3.4.4 
--mandir=/usr/share/gcc-data/arm-softfloat-linux-uclibc/3.4.4/man 
--infodir=/usr/share/gcc-data/arm-softfloat-linux-uclibc/3.4.4/info 
--with-gxx-include-dir=/usr/lib/gcc/arm-softfloat-linux-uclibc/3.4.4/include/g++-v3 
--host=x86_64-pc-linux-gnu --target=arm-softfloat-linux-uclibc 
--build=x86_64-pc-linux-gnu --disable-altivec --with-float=soft --enable-nls 
--without-included-gettext --with-system-zlib --disable-checking 
--disable-werror --disable-libunwind-exceptions --disable-multilib 
--disable-libgcj --enable-languages=c,c++ 
--with-sysroot=/usr/arm-softfloat-linux-uclibc --disable-__cxa_atexit 
--enable-target-optspace --enable-clocale=uclibc
Thread model: posix
gcc version 3.4.4 (Gentoo 3.4.4-r1, ssp-3.4.4-1.0, pie-8.7.8)

$ sparc-gentoo-linux-uclibc-gcc -c test-__thread.c
$ sparc-gentoo-linux-uclibc-gcc -v
Reading specs from /usr/lib/gcc/sparc-gentoo-linux-uclibc/3.4.4/specs
Configured with: 
/var/tmp/cross/sparc-gentoo-linux-uclibc/portage/gcc-3.4.4-r1/work/gcc-3.4.4/configure 
--prefix=/usr --bindir=/usr/sparc-gentoo-linux-uclibc/gcc-bin/3.4.4 
--includedir=/usr/lib/gcc/sparc-gentoo-linux-uclibc/3.4.4/include 
--datadir=/usr/share/gcc-data/sparc-gentoo-linux-uclibc/3.4.4 
--mandir=/usr/share/gcc-data/sparc-gentoo-linux-uclibc/3.4.4/man 
--infodir=/usr/share/gcc-data/sparc-gentoo-linux-uclibc/3.4.4/info 
--with-gxx-include-dir=/usr/lib/gcc/sparc-gentoo-linux-uclibc/3.4.4/include/g++-v3 
--host=x86_64-pc-linux-gnu --target=sparc-gentoo-linux-uclibc 
--build=x86_64-pc-linux-gnu --disable-altivec --enable-nls 
--without-included-gettext --with-system-zlib --disable-checking 
--disable-werror --disable-libunwind-exceptions --disable-multilib 
--disable-libgcj --enable-languages=c --disable-shared --disable-threads 
--without-headers --disable-__cxa_atexit --enable-target-optspace 
--enable-clocale=uclibc
Thread model: single
gcc version 3.4.4 (Gentoo 3.4.4-r1, ssp-3.4.4-1.0, pie-8.7.8)
-mike

Attachment: test-__thread.c
Description: Text document

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