Re: libocci - when is it linked into Oracle.so?

On Mon, Nov 22, 2010 at 4:08 PM, John R Pierce <[email protected]> wrote:
> On 11/22/10 11:58 AM, E R wrote:
>>
>> Hi,
>>
>> I have two DBD/Oracle/Oracle.so shared libraries. In one case ldd
>> reports that libocci is linked in, and in another case libocci doesn't
>> show up.
>
> wild guess says one was linked statically (eg, libocci.a rather than
> libocci.so).   static linking embeds a copy of the lib in the module so its
> not externally referenced.   good in that you don't have to worry about the
> lib path, bad in that if the lib is updated your module won't see the new
> one, good in that if those updates break something, it won't effect you.

Here is the ldd from the one which includes libocci.so:

	linux-gate.so.1 =>  (0x00ae5000)
	libocci.so.10.1 =>
/usr/lib/oracle/10.2.0.4/client/lib/libocci.so.10.1 (0x00110000)
	libclntsh.so.10.1 =>
/usr/lib/oracle/10.2.0.4/client/lib/libclntsh.so.10.1 (0x00ae6000)
	libpthread.so.0 => /lib/libpthread.so.0 (0x00625000)
	libc.so.6 => /lib/libc.so.6 (0x0026f000)
	libstdc++.so.5 => /usr/lib/libstdc++.so.5 (0x003b5000)
	libm.so.6 => /lib/libm.so.6 (0x00207000)
	libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x009c7000)
	libnnz10.so => /usr/lib/oracle/10.2.0.4/client/lib/libnnz10.so (0x00672000)
	libdl.so.2 => /lib/libdl.so.2 (0x0022e000)
	libnsl.so.1 => /lib/libnsl.so.1 (0x00232000)
	/lib/ld-linux.so.2 (0x00253000)

Here is the ldd from one that doesn't:

	linux-gate.so.1 =>  (0x00740000)
	libclntsh.so.10.1 => /.../oracle/libclntsh.so.10.1 (0x00741000)
	libc.so.6 => /lib/libc.so.6 (0x0026f000)
	libnnz10.so => /.../oracle/libnnz10.so (0x003b5000)
	libdl.so.2 => /lib/libdl.so.2 (0x00110000)
	libm.so.6 => /lib/libm.so.6 (0x00114000)
	libpthread.so.0 => /lib/libpthread.so.0 (0x0017d000)
	libnsl.so.1 => /lib/libnsl.so.1 (0x00195000)
	/lib/ld-linux.so.2 (0x00253000)

The directory /.../oracle is where a copy of the instantclient
libraries are located. The files there compare byte-for-byte with the
files in /usr/lib/oracle/10.2.0.4/client/lib.

In the first case, how did the c++ library get brought into the picture???