Re: fenv.h not found?

[Bryan Hundven <bryanhundven at gmail dot com>]

On Tue, Oct 19, 2010 at 12:22 AM, Arnaud Lacombe <lacombar@gmail.com> wrote:
> Hi,
>
> On Tue, Oct 19, 2010 at 2:47 AM, Bryan Hundven <bryanhundven@gmail.com> wrote:
>> On Mon, Oct 18, 2010 at 11:38 PM, Arnaud Lacombe <lacombar@gmail.com> wrote:
>>> Hi,
>>>
>>> On Tue, Oct 19, 2010 at 1:43 AM, Anthony Foiani
>>> <anthony.foiani@gmail.com> wrote:
>>>> [...]
>>>> ./xtools/powerpc-e500v2-linux-gnuspe/sys-root/usr/include/bits/fenv.h
>>>> ./xtools/powerpc-e500v2-linux-gnuspe/sys-root/usr/include/tr1/fenv.h
>>>> ./xtools/powerpc-e500v2-linux-gnuspe/sys-root/usr/include/fenv.h
>>>>
>>> this looks odd. These last two `fenv.h' from GCC generally ends up in
>>> %SYSROOT%/include/c++/%GCC_VERSION%/, but not in your case. EGlibc
>>> header gets installed:
>>>
>>> [ALL Â] Â Â/opt/cross/platforms/foo/xtools-build/tools/bin/install -c
>>> -m 644 ../sysdeps/powerpc/bits/fenv.h
>>> /opt/cross/platforms/foo/xtools/powerpc-e500v2-linux-gnuspe//sys-root/usr/include/bits/fenv.h
>>>
>>> then is overwritten by gcc:
>>>
>>> c_compatibility_headers_install='/opt/cross/platforms/foo/xtools-build/src/gcc-4.5.1/libstdc++-v3/include/c_compatibility/complex.h
>>> /opt/cross/platforms/foo/xtools-build/src/gcc-4.5.1/libstdc++-v3/include/c_compatibility/fenv.h
>>> /opt/cross/platforms/foo/xtools-build/src/gcc-4.5.1/libstdc++-v3/include/c_compatibility/tgmath.h
>>> /opt/cross/platforms/foo/xtools-build/src/gcc-4.5.1/libstdc++-v3/include/c_compatibility/stdatomic.h';
>>> Â Â Âfor file in $c_compatibility_headers_install; do
>>> /opt/cross/platforms/foo/xtools-build/tools/bin/install -c -m 644
>>> $file /opt/cross/platforms/foo/xtools/powerpc-e500v2-linux-gnuspe//sys-root/usr/include;
>>> done
>>>
>>> Â- Arnaud
>>>
>>
>> Hmm. I have been building e500v2 toolchains with ct-ng for a little
>> while, and the only problems I have ran into were
>> --enable-target-optspace hitting an optimization issue and this c++
>> search path issue (the last one happened on all of my toolchains, not
>> just the e500v2).
>>
>> I see you are using a 2125 of ctng. Could you try with at least 2141
>> to rule out the c++ search path issue?
>>
> hum, Yann's patch (which ) looks broken:
>
> + Â Âif [ "${CT_CC_LANG_CXX}" = "y" Â ]; then
> + Â Â Â Âextra_config+=("--with-gxx-include-dir=${CT_SYSROOT_DIR}/usr/include")
> + Â Âfi
> +
>
> "${CT_SYSROOT_DIR}/usr/include" is "${CT_HEADERS_DIR}" where the libc
> is told to install its headers...
>
> As the GCC's fenv.h tries to include the one provided by the C
> library, it naturally dies.
>
> Â- Arnaud

You may be right, but it would seem to me that it would try to find:
x-tools/powerpc-e500v2-linux-gnuspe/powerpc-e500v2-linux-gnuspe/sys-root/usr/include/c++/4.5.1/fenv.h

first, but since g++ is looking in the wrong spot for c++ includes
(${CT_SYSROOT_DIR}/include), it can't load it.

-Bryan

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