Libtoool 2.2.6a make check error

[N.W. England]

I have had problems where libtool was linking to a 32bit library while I am 
on a 64bit machine so I tried updating to the latest libtool. I downloaded 
the 2.2.6a version from GNU FTP mirror.

./configure and make have no errors, but when I run make check I get:

...
PASS: tests/fcdemo-make.test
FAIL: tests/fcdemo-exec.test
PASS: tests/fcdemo-conf.test
PASS: tests/fcdemo-make.test
FAIL: tests/fcdemo-exec.test
PASS: tests/fcdemo-shared.test
PASS: tests/fcdemo-make.test
FAIL: tests/fcdemo-exec.test
====================================
3 of 123 tests failed
(1 tests were not run)
Please report to address@hidden
====================================
make[3]: *** [check-TESTS] Error 1
make[3]: Leaving directory `/home/nwe23/software/libtool-2.2.6'
make[2]: *** [check-am] Error 2


(the error while trying to compile other software is:)

/lib/libstdc++.so: could not read symbols: File in wrong format
collect2: ld returned 1 exit status

Any help would be appreciated!

Thanks,

Nick