libc build broken with clang ?

[Alex Kuster]

Hi!  I'm writing because I'm having some issues with -CURRENT and clang in 
amd64.
I first compiled latest revision at this date and everything went ok:

> [0][root at Symphony ~]# uname -a
> FreeBSD Symphony.Gl 9.0-CURRENT FreeBSD 9.0-CURRENT #4: Sun Jul 10 10:38:28
> ART 2011     toor at Symphony.Gl:/usr/obj/usr/src/sys/GENERIC  amd64

Now, a week or two later, something around libc broke.
here's the output of make buildworld with clang :

> lang -fpic -DPIC -O2 -pipe "-march=native"  -I/usr/src/lib/libc/include
> -I/usr/src/lib/libc/../../include -I/usr/src/lib/libc/amd64 -DNLS 
> -D__DBINTERFACE_PRIVATE -I/usr/src/lib/libc/../../contrib/gdtoa -DINET6
> -I/usr/obj/usr/src/lib/libc -I/usr/src/lib/libc/resolv -D_ACL_PRIVATE
> -DPOSIX_MISTAKE -I/usr/src/lib/libc/../../contrib/tzcode/stdtime
> -I/usr/src/lib/libc/stdtime -I/usr/src/lib/libc/locale -DBROKEN_DES
> -DPORTMAP -DDES_BUILTIN -I/usr/src/lib/libc/rpc -DYP -DNS_CACHING
> -DSYMBOL_VERSIONING -std=gnu99 -fstack-protector -Wsystem-headers -Wall
> -Wno-format-y2k -Wno-uninitialized -Wno-pointer-sign -c
> /usr/src/lib/libc/string/wmemset.c -o wmemset.So building shared library
> libc.so.7
> /usr/bin/ld: cap_getrights.So: relocation R_X86_64_32S against
> `SYS_cap_getrights' can not be used when making a shared object; recompile
> with -fPIC cap_getrights.So: could not read symbols: Bad value
> clang: error: linker command failed with exit code 1 (use -v to see
> invocation) *** Error code 1
> 
> Stop in /usr/src/lib/libc.
> *** Error code 1
> 
> Stop in /usr/src.
> *** Error code 1

My kernel configurations is very generic ( here it is, just in case -> 
http://pastebin.com/ev78UTZL ), I've just disabled debug-related stuff (I have 
a separate kernel for that)

I also think that my make.conf has nothing special (but I'll leave it anyways 
-> http://pastebin.com/2Pi0ejbR )

So, I'm kinda confused here (I'm still not completely familiar with the source 
code)
Any idea ?

Thanks for reading !

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