[sraue]

@openelec.tv, do you have any experience in building codesourcery cross-toolchain as native on Arm platform ?

no, but i can take an look on this cross toolchain. do you want install this toolchain on arm or crosscompile *for* arm?

[davilla]

no, but i can take an look on this cross toolchain. do you want install this toolchain on arm or crosscompile *for* arm?

Specifically, install arm-2008q3-72-arm-none-linux-gnueabi.src.tar.bz2 on an arm filesystem (ubuntu 9.04 based). This is tegra2 linux sdk. The native gcc is different than their cross-toolchain and I need the above to get the correct mfpu set. This would be for a native arm build of xbmc on tegra2 platform.

[sraue]

Specifically, install arm-2008q3-72-arm-none-linux-gnueabi.src.tar.bz2 on an arm filesystem (ubuntu 9.04 based). This is tegra2 linux sdk. The native gcc is different than their cross-toolchain and I need the above to get the correct mfpu set. This would be for a native arm build of xbmc on tegra2 platform.

do you cant set your needed mfpu (and others) with this toolchain? i am are little bit confused, why you use an cross toolchain on ARM to build native (for ARM)?

what do you think about to use OpenELEC`s toolchain to build for ARM?

[davilla]

do you cant set your needed mfpu (and others) with this toolchain? i am are little bit confused, why you use an cross toolchain on ARM to build native (for ARM)?

what do you think about to use OpenELEC`s toolchain to build for ARM?

cross-compiling xbmc is a pain if the build environment is not setup just right. Nvidia's build environment is not setup right for a large app like XBMC with it's many, many depends. This leaves building in scratchbox or native. On tegra2, native is not that slow, about 1 hour for a make -j2 from a make clean... Similar to the AppleTV.

The problem is the native gcc is ubuntu-arm 9.04 and not arm-2008q3. With the native gcc, I can't set mfpu as vfpv3-d16, so no hw floating point

I also need to be careful about toolsets as I'm linking to OpenGL/ES and later OpenMax libs which are built using arm-2008q3.

[sraue]

cross-compiling xbmc is a pain if the build environment is not setup just right. Nvidia's build environment is not setup right for a large app like XBMC with it's many, many depends. This leaves building in scratchbox or native. On tegra2, native is not that slow, about 1 hour for a make -j2 from a make clean... Similar to the AppleTV.

The problem is the native gcc is ubuntu-arm 9.04 and not arm-2008q3. With the native gcc, I can't set mfpu as vfpv3-d16, so no hw floating point

I also need to be careful about toolsets as I'm linking to OpenGL/ES and later OpenMax libs which are built using arm-2008q3.

i dont know if i right:

Ubuntu 9.04 uses gcc-4.3.x
Ubuntu 9.10 uses gcc-4.4.x

i have take an look at:
http://gcc.gnu.org/onlinedocs/gcc-4.3.4/...RM-Options
and:
http://gcc.gnu.org/onlinedocs/gcc-4.4.3/...RM-Options

and i have seen with gcc-4.4 it is possible to define --mfp=vfpv3-d16, with gcc-4.3 not.

so do you can use an ARM filesystem based on ubuntu 9.10 or upgrade gcc to 4.4.x to compile native?

[sraue]

--mfp=vfpv3-d16, with gcc-4.3 not.

i mean -mfpu=vfpv3-d16

[davilla]

i dont know if i right:

Ubuntu 9.04 uses gcc-4.3.x
Ubuntu 9.10 uses gcc-4.4.x

i have take an look at:
http://gcc.gnu.org/onlinedocs/gcc-4.3.4/...RM-Options
and:
http://gcc.gnu.org/onlinedocs/gcc-4.4.3/...RM-Options

and i have seen with gcc-4.4 it is possible to define --mfp=vfpv3-d16, with gcc-4.3 not.

so do you can use an ARM filesystem based on ubuntu 9.10 or upgrade gcc to 4.4.x to compile native?

not sure, did not glib version change from 4.3.4 to 4.4.3 ?

[sraue]

not sure, did not glib version change from 4.3.4 to 4.4.3 ?

an glibc upgrade can be only problematic on precompiled gcc packages if you use for example packages for 9.10 on 9.04. but you have several choices:

- try to install gcc from 9.10 on 9.04, this can be cause problems, because the packages are compiled (eventually you must upgrade some/many other libs - like glibc)
- recompile the gcc source packages from 9.10 on 9.04 - dont know if this compiles without problems on ubuntu, but this can be fixed
- install or upgrade your 9.04 system to 9.10
- look if there are gcc-4.4 packages for 9.04 (i have read there are gcc-snapshot packages for 9.04)

the safest way is upgrade to 9.10 or find precompiled packages for 9.04

[Asswipe44]

this thread is amazing to read. everything means something.