The same sources, different RPM packages?

[ciacho]

I have a problem RPM packages. RPM packages created from the same sources differ in size. The difference isn't big, mere few kilobytes, and the contents stays the same. Is there any field within the package itself which may alter package size depending on the date?

[aliov]

I had this issue , but with creating Slackware packages , creating the same packages from source lead me to different sizes, but after some investigation i found the configure script wish comes with packages makes the difference in two cases ,

first sure if you enable some feature with the configure script .

second the script checks what you have as an installed package in your system for some of them wish are optional if present then they will be linked and the size will be little bit different even if you still see the same files inside the package .

so i create a package before and after installing some others and i got crazy from this , but i realize the problem at the end.

but if created twice , this i don't know , yes as you said probably the date and the time can makes this difference but i can't tell , only what i know is what i said before ! and also i don't have to much experience with the RPM packages.

Regards.