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From: Noel Duffy <hobcraft-usenet@yahooxtra.co.nz>
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Subject: Re: Differences between gnat 4.4.5 and 4.5.1
Date: Thu, 10 Mar 2011 21:36:28 +0000 (UTC)
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On Thu, 10 Mar 2011 05:48:25 -0800, Julian Leyh wrote:
> What do "file" and "ldd" tell you about them? Are the sizes more similar
> if you "strip" them?

As I said, I compile with this command:

$ gnatmake -f -Os hello.adb -largs -s

which strips the executables, so the size disparity is for final stripped 
executables. file shows this for Fedora:

$ file hello
hello: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically 
linked (uses shared libs), for GNU/Linux 2.6.32, stripped

On Debian:

$ file hello
hello: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically 
linked (uses shared libs), for GNU/Linux 2.6.18, stripped

ldd shows that both are dynamically linked against libgnat. I.e, on Fedora:

$ ldd hello
	linux-vdso.so.1 =>  (0x00007fff1b5a3000)
	libgnat-4.5.so => /usr/lib64/libgnat-4.5.so (0x00007f89c2909000)
	libc.so.6 => /lib64/libc.so.6 (0x000000343e600000)
	libm.so.6 => /lib64/libm.so.6 (0x000000343f200000)
	libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x000000343f600000)
	/lib64/ld-linux-x86-64.so.2 (0x000000343e200000)

On Debian:

$ ldd hello
	linux-vdso.so.1 =>  (0x00007fff52d9e000)
	libgnat-4.4.so.1 => /usr/lib/libgnat-4.4.so.1 (0x00007f47c6c2a000)
	libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00007f47c6a14000)
	libc.so.6 => /lib/libc.so.6 (0x00007f47c66b2000)
	libm.so.6 => /lib/libm.so.6 (0x00007f47c6430000)
	/lib64/ld-linux-x86-64.so.2 (0x00007f47c7160000)