On Fri, 21 Nov 2014, Simon McVittie wrote: > failing to start up on armel due to unaligned memory accesses. lzo2 has > a cpp macro, LZO_CFG_NO_UNALIGNED which can be defined to stop it doing > "clever" things with casting pointers. If the maintainer doesn't object
Please define this macro unconditionally: • “clever” things with pointers are often Undefined Behaviour™ and GCC is a repeat offender at optimising these into brokenness; LLVM also makes advantage of the C standard here • for i386 and especially amd64, all subarchitectures supported by Debian/Linux jessie suffer so much from unaligned access, speed-wise, that it’s worth the overhead of forcing aligned access (i386, i486 maybe were not as badly affected) • it’s good to have the same codepath independent of the arch compiled for, instead of slightly differing across arches Thanks, //mirabilos -- Sometimes they [people] care too much: pretty printers [and syntax highligh- ting, d.A.] mechanically produce pretty output that accentuates irrelevant detail in the program, which is as sensible as putting all the prepositions in English text in bold font. -- Rob Pike in "Notes on Programming in C" -- To UNSUBSCRIBE, email to debian-devel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/alpine.deb.2.11.1411211418570.1...@tglase.lan.tarent.de
