fenv.h not found?

[Arnaud Lacombe]

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  ]    /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';
>>      for 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
>>
>>  - 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:

+    if [ "${CT_CC_LANG_CXX}" = "y"   ]; then
+        extra_config+=("--with-gxx-include-dir=${CT_SYSROOT_DIR}/usr/include")
+    fi
+

"${CT_SYSROOT_DIR}/usr/include" is "${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.

 - Arnaud

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