Re: [Valgrind-developers] Failed building valgrind (memcheck) on Linux powerpc32 (undefined reference to `__floatsidf')

[Christophe L. <chr...@cs...>]

Hi Carl,

Le 16/06/2022 à 18:04, Carl Love a écrit :
> Christophe:
> 
> On Thu, 2022-06-16 at 10:51 +0000, Christophe Leroy wrote:
>> Hello
>>
>> Trying to build valgrind-3.19.0.
>>
>> ./configure --host=ppc-linux --prefix=/usr --enable-only32bit --
>> disable-tls
>>
>> I'm using glibc-2.35
>>
>> I end up with following errors (many more of the same kind follows):
>>
>> /opt/cldk-1.5.1rc1b1/lib/gcc/ppc-linux/11.2.0/../../../../ppc-
>> linux/bin/ld:
>> memcheck_ppc32_linux-mc_main.o: in function `gcSecVBitTable':
>> /home/chleroy/ldb_base/ofs/packages/valgrind-
>> 3.19.0/memcheck/mc_main.c:993:
>> undefined reference to `__floatsidf'
>>
> 
> Not sure why your using cldk-1.5.1.1rc1b1 in /opt?  Not sure what that
> is?

That's just the directory where sits my home built cross compiler.

> 
> When I tried the configure on a Power 10 64-bit system:
> 
>   ./configure --host=ppc-linux --prefix=/home/carll --enable-only32bit
> --disable-tls
> 
> The configure went fine but the compile fails on
> /usr/include/gnu/stubs.h:8:11: fatal error: gnu/stubs-32.h: No such
> file or directory
> 
> Not sure what system you are on and why you need the enable-only32bit?

I'm building on a x86_64 for running on a board which has a 32 bits 
powerpc CPU. That CPU has no FPU.

> 
> I normally build for 64-bit machines, so I tried:
> 
> ./configure --host=ppc-linux --prefix=/home/carll --disable-tls
> 
> I see at the end of the configure:
> 
>   Maximum build arch: ppc32
>   Primary build arch: ppc32
> 
> and again get a ppc32 related build error.
> 
> Since I am on a ppc64 LE system I did the following configure:
> 
>   ./configure --host=ppc64le-linux --prefix=/home/carll --disable-tls
> 
> Note, I am using the distro compiler /usr/bin/gcc and glibc.  The build
> works fine with the distro gcc and glibc.  Can you set your paths to
> use the default distro gcc and glib?

I can't, I need a cross-build compiler with glibc support for my target.

It is GCC 11 with Glibc 2.35


> 
> Note, the version of glibc that I am using, as given by the ldd
> command, is:
> 
> $ ldd --version ldd
> ldd (GNU libc) 2.34
> 

The point is:
- libgcc doesn't include floating point functions on powerpc, they are 
in libc
- valgrind is built statically against libgcc, without libc

Christophe