Guillem Jover <guillem <at> debian.org> writes: > On Mon, 2015-05-11 at 01:34:08 +0200, Matthias Klose wrote: > > On 05/10/2015 03:32 AM, Guillem Jover wrote: > > > CC_FOR_BUILD = gcc
Plus, what Wookey said. > > the above mentioned wiki pages still talk about HOSTCC and BUILDCC. Please > > clarify when to use these. > > I think HOSTCC and BUILDCC should never be used, because they are either > very confused in their meaning alternating depending on the upstream, or Allow me to explain: There are two coëxisting sets of nomenclature for cross-compiling around. Both are “correct” and have their merits, but they come from different cultures and have different goals. Embedded systems people usually speak of “host” and “target”. In this case, “host” is the system on which you build the image, and “target” is the system on which you run the image. This stems from the “target”s being not enough of a computer to be able to do things by themselves. GNU people usually speak of “build” and “host” and, in some cases, “target”. Here, “build” is the system on which the compilation happens, “host” is the system on which the compilates run, and “target” is the system the *output* of running the *compilates* is supposed to run on (only valid for things like compilers). This is also where the “canadian cross” comes from. So, to convert. From ES to GNU: host → build target → host(, target) From GNU to ES: build → host host → target target (if == host) → target target (if != host) → not mappable Unfortunately, variables like HOSTCC, TARGET_CC, CC_FOR_BUILD, BUILD_CC, etc. cannot simply be put into either scheme because of the ambiguity. It is not right to simply say “scheme X should never be used” because both are correct, even at the same time, they are just different sets of naming conventions (think lpszHungarianNotation vs. dromedarCaseThing). Instead, Debian should neutrally define a set of knobs to set, which the debian/rules files then can convert to whatever upstream requires, which may require nomenclature conversations. (This also means exporting those variables must not be done by default.) bye, //mirabilos (hat: FreeWRT and OpenADK developer)
