Alan McKinnon schrieb am 04.04.2009 23:55: > On Saturday 04 April 2009 23:42:54 Daniel Pielmeier wrote: >> Joseph schrieb am 04.04.2009 22:48: >>> Is there a way to verify GCC version program was compiled with? >>> I just want to check if all the programs were compiled with latest GCC >>> version as I'm getting an errors at time to time. >> I don't think it is possible to get the compiler or it's version used >> for a specific program. If you are upgrading the compiler it is >> advisable to recompile the complete system so all programs are compiled >> with the same compiler version. Take a look at the gcc upgrading guide >> [1] for the necessary steps you need to follow. >> >> [1] http://www.gentoo.org/doc/en/gcc-upgrading.xml > > This is complete nonsense advice. There is absolutely no need to rebuild the > entire system every time you upgrade compilers, and whoever told you that is > flat out wrong. If the gentoo docs told you that, then they are wrong, or > misplaced, or the person writing them is overcautious to the point of being > ridiculous. If this advice really was true, then a whole lot of stuff would > break all over the world: > > - every Windows box on the planet would need a complete reinstall whenever a > Windows Update happened (Yes, Microsoft does upgrade their compiler!) > - third party apps would not run, as you have no way of knowing if Oracle's > compiler is the same as yours (and you don't even have a guarantee that > Oracle > uses gcc). My Oracle instance at work is working just fine and I know for a > fact the compilers used for it and SuSE are not even in the same version > series. > - Compiling any package locally could not work on a binary distro. But they > do. > > There are *some* special cases where the gcc devs break stuff at an ABI level > between versions (usually related to C++ not to C). These are well known and > heavily documented - the toolchain devs make sure of this. 3.3 to 3.4 was > such > a case, there was another minor case early in the gcc-4 series. By no means > do > this mean that the fix for those cases must now be applied every time. >
I must confess that I don't know if there is an ABI breakage between 4.1.2 and 4.3.2. So if there is none you may be fine without rebuilding world. -- Daniel Pielmeier
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