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Date: Sun, 26 Sep 2004 09:28:34 -0400
From: Andrew Dunstan <andrew@dunslane.net>
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To: Dennis Bjorklund <db@zigo.dhs.org>
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Subject: Re: Use of zlib
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Dennis Bjorklund wrote:

>This is the output in Fedora Core 2, and it includes readline:
>
>$ ldd /usr/bin/postgres
>        linux-gate.so.1 =>  (0x00240000)
>        libpam.so.0 => /lib/libpam.so.0 (0x00cf1000)
>        libssl.so.4 => /lib/libssl.so.4 (0x0014e000)
>        libcrypto.so.4 => /lib/libcrypto.so.4 (0x00241000)
>        libkrb5.so.3 => /usr/lib/libkrb5.so.3 (0x0052a000)
>        libcom_err.so.2 => /lib/libcom_err.so.2 (0x00e56000)
>        libz.so.1 => /usr/lib/libz.so.1 (0x00aca000)
>        libreadline.so.4 => /usr/lib/libreadline.so.4 (0x00111000)
>        libtermcap.so.2 => /lib/libtermcap.so.2 (0x00f25000)
>        libcrypt.so.1 => /lib/libcrypt.so.1 (0x00406000)
>        libresolv.so.2 => /lib/libresolv.so.2 (0x00f8a000)
>        libnsl.so.1 => /lib/libnsl.so.1 (0x00215000)
>        libdl.so.2 => /lib/libdl.so.2 (0x00908000)
>        libm.so.6 => /lib/tls/libm.so.6 (0x008a5000)
>        libc.so.6 => /lib/tls/libc.so.6 (0x00592000)
>        libgssapi_krb5.so.2 => /usr/lib/libgssapi_krb5.so.2 (0x00a57000)
>        libk5crypto.so.3 => /usr/lib/libk5crypto.so.3 (0x00ccd000)
>        /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x004ca000)
>
>
>  
>

Now, to see the things postgres really needs, as opposed to things other 
libraries need or that we just throw in for good measure in case 
somebody needs them, run this:

  LDFLAGS=-Wl,--as-necessary ./configure

without any third-party options (like pam, openssl, kerberos ...), 
Alternatively, you can set the flag in src/Makefile.global

This should work on FC2, which I believe has binutils 2.15.

Almost every line above will disappear.

cheers

andrew