Ceph

A ''librados-config'' binary might be usefull here. This is also used by libcurl, libxml2 and PHP.

For example:

wido@wido-laptop:~$ curl-config --features
SSL
IPv6
libz
IDN
NTLM
wido@wido-laptop:~$ curl-config --version
libcurl 7.19.7
wido@wido-laptop:~$ curl-config --vernum
071307
wido@wido-laptop:~$ curl-config --libs
-lcurl
wido@wido-laptop:~$

wido@wido-laptop:~$ php-config --libs
-lcrypt -lz -lcrypt -lssl -ldb -lbz2 -lz -lpcre -lssl -lrt -lm -ldl -lnsl -lxml2 -lgssapi_krb5 -lkrb5 -lk5crypto -lcom_err -lxml2 -lxml2 -lxml2 -lcrypt -lxml2 -lxml2 -lxml2 -lxml2 -lcrypt
wido@wido-laptop:~$ php-config --vernum
50302
wido@wido-laptop:~$ php-config --version
5.3.2-1ubuntu4.2
wido@wido-laptop:~$

Librados could implement (where i think version and vernum are semi-mandatory):

wido@wido-laptop:~$ librados-config --version
0.22-rc1
wido@wido-laptop:~$ librados-config --vernum
02201
wido@wido-laptop:~$ librados-config --features
LARGE_FILE
IPV6
AIO
wido@wido-laptop:~$

This is a common used method to get information from libraries during configure time. During the configure process you can invoke librados-config and check wether it has the right version, right features, etc, etc.

Thanks, but this has only been done in the librados C library, not in the C++. Has this been done un purpose (just to facilitate Qemu RBD?).

I'd like to use this too for phprados, but that one is build against the C++ librados.

rados->version() implemented in baae4bc7c5390681d4549bdfb9ec4204aa515eb1.