Re: What library uses postmaster when lib postgres files

The Libraries used are solved by the liker. Try ldd <exec file> to show
the paths of the library that <exec file> needs. You can say to the
linker where it can find your libraries (man ld).

Example 1: default paths from a default paths PostgreSQL installation.
$ ldd /usr/bin/psql
libpq.so.3 => /usr/lib/libpq.so.3 (0x40029000)
libpam.so.0 => /lib/libpam.so.0 (0x40044000)
libssl.so.2 => /lib/libssl.so.2 (0x4004c000)
libcrypto.so.2 => /lib/libcrypto.so.2 (0x40079000)
libkrb5.so.3 => /usr/kerberos/lib/libkrb5.so.3 (0x4013c000)
libcom_err.so.3 => /usr/kerberos/lib/libcom_err.so.3 (0x40194000)
libz.so.1 => /usr/lib/libz.so.1 (0x40198000)
libreadline.so.4 => /usr/lib/libreadline.so.4 (0x401a6000)
libtermcap.so.2 => /lib/libtermcap.so.2 (0x401cc000)
libcrypt.so.1 => /lib/libcrypt.so.1 (0x401d0000)
libresolv.so.2 => /lib/libresolv.so.2 (0x401fd000)
libnsl.so.1 => /lib/libnsl.so.1 (0x4020f000)
libdl.so.2 => /lib/libdl.so.2 (0x40225000)
libm.so.6 => /lib/i686/libm.so.6 (0x4022a000)
libc.so.6 => /lib/i686/libc.so.6 (0x4024d000)
libpthread.so.0 => /lib/i686/libpthread.so.0 (0x40388000)
libk5crypto.so.3 => /usr/kerberos/lib/libk5crypto.so.3 (0x4039d000)
/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)

Example 2: modified paths from a not default paths PostgreSQL installation.
Sitefdevel:~$ ldd $HOME/opt/postgres-8.1.5/bin/psql
$ echo "LD_LIBRARY_PATH=$LD_LIBRARY_PATH"
LD_LIBRARY_PATH=/home/cvsitef/opt/postgres-8.1.5/lib
libpq.so.4 => /home/cvsitef/opt/postgres-8.1.5/lib/libpq.so.4
(0x40018000)
libz.so.1 => /usr/lib/libz.so.1 (0x40042000)
libreadline.so.4 => /usr/lib/libreadline.so.4 (0x40050000)
libtermcap.so.2 => /lib/libtermcap.so.2 (0x40076000)
libcrypt.so.1 => /lib/libcrypt.so.1 (0x4007a000)
libresolv.so.2 => /lib/libresolv.so.2 (0x400a7000)
libnsl.so.1 => /lib/libnsl.so.1 (0x400b9000)
libdl.so.2 => /lib/libdl.so.2 (0x400d0000)
libm.so.6 => /lib/i686/libm.so.6 (0x400d4000)
libc.so.6 => /lib/i686/libc.so.6 (0x400f7000)
libpthread.so.0 => /lib/i686/libpthread.so.0 (0x40232000)
/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)

Best regards
Jorge Serván.

Adam Radłowski wrote:
> I'm testing 8.1.3 and 8.1.6 of FC3 2.6.12 .
> I have installed (compiled from source) two copies of PostgreSQL:
> 8.1.3 - typically in /usr/local/pgsql and I have configured path to
> these libs (in ld.so.conf): /usr/local/pgsql/lib
> 8.1.6 - not typically in /usr/local/pgsql816 (I edited before
> installing with "make install" src/Makefile.global and I changed
> "prefix" for install after "configure" and "make")
> I never use this two versions of postmaster parallel, so I use for
> them this same database cluster.
>
> What libraries uses postmaster 8.1.6 in this situation ? Their own
> libs or taken from 8.1.3 ?
>
> Best regards
> Adam
>
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