Re: [gentoo-embedded] C compiler cannot create executables

[Jason]

Jean-Claude Gervais wrote:
> On Tue, 2007-11-06 at 15:38 -0500, Jason wrote:
>> Jean-Claude Gervais wrote:
>>> On Tue, 2007-11-06 at 15:19 -0500, Jason wrote:
>>>> Jean-Claude Gervais wrote:
>>>>> On Tue, 2007-11-06 at 13:11 -0500, Jason wrote:
>>>>>> Jean-Claude Gervais wrote:
>>>>>>> On Tue, 2007-11-06 at 12:46 -0500, Jason wrote:
>>>>>>>> Jean-Claude Gervais wrote:
>>>>>>>>> Same problem, different environment:
>>>>>>>>>
>>>>>>>>> I produced a cross-development toolkit by using the following command:
>>>>>>>>>
>>>>>>>>> .-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
>>>>>>>>> SYSROOT="/usr/arm-softfloat-linux-uclibc"
>>>>>>>>>
>>>>>>>>> UCLIBC_CPU="ARM920T" USE="-*" crossdev -v -S --binutils 2.17 --gcc
>>>>>>>>> 3.4.6-r2 --kernel 2.6.19-r2 --libc 0.9.28.3 --ex-gdb --target
>>>>>>>>> arm-softfloat-linux-uclibc
>>>>>>>>> .-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
>>>>>>>>>
>>>>>>>>> This went well; all the required tools were built.
>>>>>>>>>
>>>>>>>>> But now when I try to use the (modified) xmerge script, I get the
>>>>>>>>> "C compiler cannot create executables" error
>>>>>>>> [snip]
>>>>>>>>> configure:1225: checking build system type
>>>>>>>>> configure:1243: result: i686-pc-linux-gnu
>>>>>>>>> configure:1250: checking host system type
>>>>>>>>> configure:1264: result: i686-softfloat-linux-uclibc
>>>>>>>>> configure:1272: checking target system type
>>>>>>>>> configure:1286: result: i686-softfloat-linux-uclibc
>>>>>>>> This doesn't look right.  Did you setup ${SYSROOT}/etc/make.conf and
>>>>>>>> ${SYSROOT}/etc/make.profile ?
>>>>>>> I think I did; here is the contents of
>>>>>>> /usr/arm-softfloat-linux-uclibc/etc/make.conf
>>>>>>>
>>>>>>> .-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
>>>>>>> ACCEPT_KEYWORDS="arm"
>>>>>>> ARCH="arm"
>>>>>>>
>>>>>>> CFLAGS="-Os -pipe -mfloat-abi=softfp -mfpu=vfp"
>>>>>>> CHOST="i686-softfloat-linux-uclibc"
>>>>>> This line should be:
>>>>>> CHOST="arm-softfloat-linux-uclibc"
>>>>> OK, I changed that line, performed a
>>>>> crossdev -C arm-softfloat-linux-uclibc
>>>>>
>>>>> And then re-ran the toolchain build procedure I am using;
>>>> judging by your initial ncurses build error, you haven't successfully
>>>> xmerge'd anything into SYSROOT, so all you had to do was change CHOST in
>>>> ${SYSROOT}/etc/make.conf, then try xmerge ncurses again.
>>>>
>>>>> SYSROOT="/usr/arm-softfloat-linux-uclibc"
>>>>>
>>>>> UCLIBC_CPU="ARM920T" USE="-*" crossdev -v -S --binutils 2.17 --gcc
>>>>> 3.4.6-r2 --kernel 2.6.19-r2 --libc 0.9.28.3 --ex-gdb --target
>>>>> arm-softfloat-linux-uclibc
>>>> crossdev doesn't use SYSROOT, it creates it.  So there is no need to set it.
>>>>
>>>>> Which concluded with no errors.
>>>>>
>>>>> However, when I run any xmerge, I still get the same error
>>>>> "C compiler cannot create executables"
>>>> Did you repeat Section 3 of the cross-development guide after blowing
>>>> away SYSROOT with crossdev -C <target>?
>>> Yes, absolutely.
>>>
>>>>   And set CHOST correctly?
>>> You mean in /usr/arm-softfloat-linux-uclibc/etc/make.conf ?
>>> Yes.
>>>
>>> The make.conf at that location is
>>>
>>> ACCEPT_KEYWORDS="arm"
>>> ARCH="arm"
>>>
>>> CFLAGS="-Os -pipe -mfloat-abi=softfp -mfpu=vfp"
>>> CHOST="arm-softfloat-linux-uclibc"
>>> CXXFLAGS="${CFLAGS}"
>>> GENTOO_MIRRORS="http://open-systems.ufl.edu/mirrors/gentoo
>>> http://prometheus.cs.wmich.edu/gentoo http://mirror.datapipe.net/gentoo
>>> http://ftp.ucsb.edu/pub/m$
>>> INPUT_DEVICES="keyboard"
>>> MAKEOPTS="-j2"
>>> USE="minimal symlink"
>>> UCLIBC_CPU="ARM920T"
>>>
>> Okay, I suspect you fixed the error you were getting before
>> (configure:1286: result: i686-softfloat-linux-uclibc), so let's take a
>> look at the config.log again and see what's tripping it up this time.
>
> Eureka! Or maybe I should say D'OH!
>
> I had some invalid compiler options: -mfloat-abi=softfp -mfpu=vfp
> in my CFLAGS!

Damn, I though those looked funny.  I personally don't use them, but I
thought you had a good reason... :-)

> I scanned the config.log too quickly last time. Sorry!
>
> and
> Thanks Jason!

No problem.  Glad I could help.

Jason.
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