Difference in binary file sizes after deploying package via yum/rpm

Linux and Unix-Like Linux
1

Hi Guys,

I have an issue whereby I package up an rpm and when I deploy it, the binary filesizes differ from what I packaged up from the SOURCE directory.

from source - -rwxrwxr-x 1 user group 685156 Sep 26 15:50 cybAgent.bin

after install - -rwxr-xr-x 1 user group 683388 Oct 16 11:10 cybAgent.bin

Other than the file sizes differing, I had no reason to believe there was an issue but it seems that all the binaries differ in size from what I packages up. Is tried deploying via yum and rpm and the sizes differ in both cases. Is this a known feature?

Thanks,
Gary.

2

is the smaller binary a stripped binary?

3

Thanks for such a quick response fpmurphy. I am not entirely sure how to find that out but I googled and seen that rpmbuild strips binaries. One forum advises to set the following at the top of the spec file -

# Turn off strip'ng of binaries
%global __strip /bin/true

Would that be your recommendation to ensure that the binary sizes match those that were in source?

Thanks again,
Gary

4

The file command will tell you about your binary.

file /usr/bin/ls

Tells you, among a lot of other stuff, about stripped.

5

Thanks Jim.

Both seem not be stripped which surprised me - I was expecting the smaller one to be stripped.

large file
cybAgent.bin: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.2.5, dynamically linked (uses shared libs), for GNU/Linux 2.2.5, not stripped
small file
cybAgent.bin: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.2.5, dynamically linked (uses shared libs), for GNU/Linux 2.2.5, not stripped

---------- Post updated at 05:23 PM ---------- Previous update was at 03:39 PM ----------

Hi Guys,

I put the following at the top of my spec file and the rpm deploys the binaries at the exact same size as they were at source.

%global __os_install_post %{nil}

Not entirely sure why this compressions occurs by default but this entry deployed the files at the exact same size.

Thanks,
Gary