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Description of problem:

Binaries compiled against the 2.6 version of the libraries (in this case ceph-osd) have the following undefined symbols.

# nm -D /usr/bin/ceph-osd|egrep '(_ZdaPvm|_ZdlPvm)'                                                                                                                                                                 
                 U _ZdaPvm                                                                                                                                                                                                                  
                 U _ZdlPvm

The 2.4 version of libtcmalloc.so.4 (gperftools-libs-2.4-8.el7.x86_64) does not export these symbols.

# nm -D /usr/lib64/libtcmalloc.so.4|egrep '(_ZdaPvm|_ZdlPvm)'
#

This leads to errors such as the following.

ceph-osd: symbol lookup error: ceph-osd: undefined symbol: _ZdaPvm

Installing gperftools-libs-2.6.1-1.el7.x86_64.rpm resolves the issue.

# nm -D /usr/lib64/libtcmalloc.so.4|egrep '(_ZdaPvm|_ZdlPvm)'
0000000000035dc0 T _ZdaPvm
0000000000035dc0 T _ZdlPvm

Maybe the library version number should have been incremented between these releases?

See https://github.com/gperftools/gperftools/commit/7efb3ecf37d88edf9cf9a43efb89b425eaf81d5e , search for "ENABLE_SIZED_DELETE".

> Maybe the library version number should have been incremented between these releases?

The library version number only says that there is no compatibilty between a binary for an old version of the library, on a system with a new version of the library.

Here you have a binary for a new version of the library, on a system with an old version of the library.  It is expected that it fails if the library defines new symbols, and the patch is pretty intrusive so I'd rather avoid this.

What system with 2.6 gperftools did you build on? (Fedora?)

(In reply to Paolo Bonzini from comment #4)
> 
> What system with 2.6 gperftools did you build on? (Fedora?)

Centos 7
gperftools.x86_64                                    2.6.1-1.el7                                    base

You need to install the older version if you want to be backwards compatible.