Gcc Version Compatibility

joshp · 02-07-2013, 10:56 AM

Hey all,

What are the chances of a program that is compiled on gcc 4.7.x working on a system that has gcc 4.4.6?

To put it another way, if I have software that was built using gcc 4.7.x, would it work on a SL 6.1 install?

Josh

knudfl · 02-07-2013, 11:31 AM

A gcc 4.7.x compiled program may depend on libgcc_s.so.1 from gcc-4.7.x.

And if the program was compiled on an OS with a later glibc,
it may depend on objects from that glibc, i.e. libc.so.6
.
A way of testing : Copy the program executable to SL 6,
and run $ ldd <executable> : If nothing is missing, it's OK.

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joshp · 02-07-2013, 12:41 PM

Thank you, was thinking in that direction. I am assuming that this would also apply to a C++ program as well?

knudfl · 02-07-2013, 02:51 PM

# 3

Any program that is compiled with gcc, g++.

But why not just recompile on the target OS ?

joshp · 02-07-2013, 03:07 PM

Long story short, our devs are using gcc 4.7.x and our production isn't.

suicidaleggroll · 02-07-2013, 03:18 PM

You could also get around the problem by compiling with static libraries.

knudfl · 02-07-2013, 03:28 PM

# 5

Quote:

our devs are using gcc 4.7.x and our production isn't

The gcc version isn't important ( usually ).
Most programs will compile with any gcc version 3.4.6 ... 4.x.x.
But there are of course exceptions.