Hi, in theory we compile all of fedora core with -mtune=i686 (or -mtune=pentium4 nowadays). however that only actually happens if packages propagate the RPM_OPT_FLAGS into the CFLAGS properly; almost all but not quite not all packages actually do this. The script at can be used to check if a shared libary is compiled with -mtune=i386 or -mtune=i686. If it detects i386 then most likely there is a packaging bug with not propagating the compiler flags properly. Usage is like this: objdump -d sharelibraryfilename.so | perl detecti686.pl known bugs: If a shared library is really small with say only 1 function, it is possible that the heuristics fail. Greetings, Arjan van de Ven
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