Bug #48750 Simple build fails with linker error on _db_pop_

Description:
Standard non-debug build fails in latest tree.

Reported by Amila Liyanaarachchi in internals@lists.mysql.com.

How to repeat:
$ ./configure
    .
    .
    .
$ make
    .
    .
    .
/bin/bash ../libtool --preserve-dup-deps --tag=CC   --mode=link gcc  -O3    -DUNIV_LINUX -DUNIV_LINUX  -rdynamic  -o dbug_analyze dbug_analyze.o libdbug.a ../mysys/libmysys.a ../strings/libmystrings.a -lpthread -lcrypt -lnsl -lm  -lpthread 
../mysys/libmysys.a(my_thr_init.o): In function `my_thread_end':
/home/bzr/mkindahl/testing-5.1/mysys/my_thr_init.c:335: undefined reference to `_db_pop_'
collect2: ld returned 1 exit status
make[1]: *** [factorial] Error 1

Compiling fails with --with-debug as well.

I couldn't repeat with latest source tree mysql-5.1 on Ubuntu 9.10 X86_64:

miguel@quetzal3:~/bzr/5.1-test$ cat /etc/issue
Ubuntu 9.10 \n \l

miguel@quetzal3:~/bzr/5.1-test$ BUILD/autorun.sh

miguel@quetzal3:~/bzr/5.1-test$ ./configure

miguel@quetzal3:~/bzr/5.1-test$ make

bmystrings.a ../../dbug/libdbug.a ../../zlib/.libs/libzlt.a -lpthread -lcrypt -lnsl -lm -lpthread
make[2]: Leaving directory `/home/miguel/bzr/5.1-test/server-tools/instance-manager'
make[1]: Leaving directory `/home/miguel/bzr/5.1-test/server-tools'
Making all in win
make[1]: Entering directory `/home/miguel/bzr/5.1-test/win'
make[1]: Nothing to be done for `all'.
make[1]: Leaving directory `/home/miguel/bzr/5.1-test/win'

Please, try to repeat with a newer version, 5.1.41, and inform about the results.

Same sequence, using configure and then make, works on 5.1.41 and does not produce this error.