[gentoo-embedded] Problems compiling sandbox with uclibc

[Ed W]

Hi, I'm unable to compile sandbox with uclibc on x86.  The error occurs 
in the configure stage as follows:

...snip...
checking CFLAGS for maximum warnings... no, unknown
checking whether C compiler accepts -fdata-sections... no
checking whether C compiler accepts -ffunction-sections... no
checking whether the linker accepts -Wl,--as-needed... no
checking whether the linker accepts -Wl,--gc-sections... no
checking whether the linker accepts -Wl,--version-script,conftest.map... no
checking whether the linker accepts -Wl,-M,conftest.map... no
configure: error: unable to find a linker flag for versioning

!!! Please attach the following file when seeking support:
!!! /var/tmp/portage/sys-apps/sandbox-1.6-r2/work/build-default/config.log
*
* ERROR: sys-apps/sandbox-1.6-r2 failed.


Checking the config.log it appears to be because of a broken definition 
which is split over two lines

#define LIBC_VERSION "libc.so.0
| ld-uClibc.so.0"


The test causing this is:

LIBC_VERSION=$(
       $READELF -d libctest | \
       $EGREP NEEDED.*libc\\.so | \
       $AWK '{print $NF}' | sed -e 's:\[::' -e 's:\]::'
)


and readelf gives me:

0x00000001 (NEEDED)                     Shared library: [libc.so.0]
0x00000001 (NEEDED)                     Shared library: [ld-uClibc.so.0]

Which in turn leads to the multiple line output


However, I can't actually see where LIBC_VERSION is even used?  Is there 
someone here who understands what is happening and can recommend the 
best fix? (Remove the whole test?)

How come no one else is seeing this?  What does readelf give for others 
using uclibc?

Ed W