From: Karsten Blees Date: Sat, 07 Dec 2013 22:32:21 GMT Subject: Re: What's cooking in git.git (Dec 2013, #02; Fri, 6) Message-ID: <52A3A1F5.3080906@gmail.com> In-Reply-To: <87fvq41esw.fsf@thomasrast.ch> Am 07.12.2013 23:23, schrieb Thomas Rast: > Karsten Blees writes: > >> Extending 'struct hashmap_entry' with an int-sized member shouldn't waste >> memory on 64-bit systems. This is already documented in api-hashmap.txt, >> but needs '__attribute__((__packed__))' to work. Reduces e.g. > > You'd have to guard __attribute__((__packed__)) with some compiler > detection in git-compat-util.h though. > Isn't that already handled? __attribute__ is already widely used (e.g. for printf formats), and platforms that don't support it define it as empty (e.g. MSVC). Or do you mean I should account for compiler-specific variants (#pragma pack...)?