Since MySQL version 5.5.10 (including 5.5.11) I can't rebuild from SRPM on CentOS 5.5 or now CentOS 5.6.
Using http://rpms.famillecollet.com/SRPMS/mys … mi.src.rpm

[build@build-x86-64 ~]$ rpmbuild -ba --define='rhel 5' /usr/src/redhat/SPECS/mysql55.spec
...snip...
+ cp /usr/src/redhat/SOURCES/mysql-embedded-check.c .
+ ln -s libmysqld.so.0.0.1 libmysqld.so.0
+ gcc -I../../include -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -fno-strict-aliasing -fwrapv -fPIC -lstdc++ mysql-embedded-check.c libmysqld.so.0
libmysqld.so.0: undefined reference to `mysql_keycache__write__block_semaphore'
libmysqld.so.0: undefined reference to `mysql_insert__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_handler__wrlock__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_net__write__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_update__row__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_select__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_query__cache__miss_semaphore'
libmysqld.so.0: undefined reference to `mysql_command__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_keycache__read__hit_semaphore'
libmysqld.so.0: undefined reference to `mysql_multi__update__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_handler__unlock__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_keycache__read__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_delete__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_delete__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_filesort__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_handler__rdlock__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_filesort__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_select__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_index__read__row__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_query__cache__hit_semaphore'
libmysqld.so.0: undefined reference to `mysql_insert__row__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_read__row__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_handler__wrlock__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_query__exec__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_keycache__read__block_semaphore'
libmysqld.so.0: undefined reference to `mysql_index__read__row__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_update__row__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_multi__delete__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_query__parse__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_multi__update__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_keycache__write__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_keycache__write__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_query__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_handler__rdlock__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_update__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_multi__delete__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_command__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_delete__row__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_delete__row__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_insert__row__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_keycache__read__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_net__read__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_insert__select__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_net__write__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_query__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_read__row__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_query__parse__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_net__read__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_handler__unlock__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_insert__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_update__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_insert__select__done_semaphore'
libmysqld.so.0: undefined reference to `mysql_query__exec__start_semaphore'
libmysqld.so.0: undefined reference to `mysql_keycache__read__miss_semaphore'
collect2: ld returned 1 exit status
error: Bad exit status from /var/tmp/rpm-tmp.65251 (%build)

RPM build errors:
    Bad exit status from /var/tmp/rpm-tmp.65251 (%build)
...snip...

Nothing has changed in my build environment since MySQL 5.5.9.  Any help or suggestions?  The same problem appears in both i386 and x86_64 environments.

Best Regards,
Ken Price