!ayCRiZriCVtuCUpeLp:nixos.org

Nix Cross Compiling

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18 Jul 2025
@dramforever:matrix.orgdramforever if it's cross it uses pkg-config for build and PKG_CONFIG_underscored_triple for host? 20:57:31
@dramforever:matrix.orgdramforeverreally?20:57:40
@dramforever:matrix.orgdramforever i thought it replaces '-' with '_' 20:57:48
@dramforever:matrix.orgdramforever otherwise why would they call it target_u 20:57:57
@dramforever:matrix.orgdramforeveroh wait it checks both20:58:23
@dramforever:matrix.orgdramforever ah yes my environment variable called foo-bar 20:58:44
@dramforever:matrix.orgdramforeverthis is definitely not a usability nightmare20:58:53
@dramforever:matrix.orgdramforeveranyway underscored should be fine20:59:11
@dramforever:matrix.orgdramforeverwe do that in nixpkgs too right?20:59:16
@emilazy:matrix.orgemilyno20:59:21
@emilazy:matrix.orgemilyit has no notion of build or host20:59:23
@emilazy:matrix.orgemilyAFAICT20:59:27
@emilazy:matrix.orgemilylike20:59:30
@emilazy:matrix.orgemilyas in20:59:30
@emilazy:matrix.orgemily the API will always look for host platform deps 20:59:37
@dramforever:matrix.orgdramforeveroh so you just can't get build pkg-config20:59:42
@emilazy:matrix.orgemilyyeah, only via dev deps20:59:52
@emilazy:matrix.orgemily it just will adjust whether it looks at HOST_* or TARGET_* based on whether the current build is cross 21:00:02
@emilazy:matrix.orgemily so you can mix multiple pkg-config in a single cargo build 21:00:10
@emilazy:matrix.orgemily but each build script only sees one platform for pkg-config purposes 21:00:20
@emilazy:matrix.orgemilyanyway it's bad and I hate it21:00:37
@dramforever:matrix.orgdramforeverthis is cursed but i can't think of anything off the top of my head that really needs the other21:01:32
@dramforever:matrix.orgdramforeverso whatever21:01:35
@emilazy:matrix.orgemilywell21:03:41
@emilazy:matrix.orgemilythe package we are trying to fix is sort of one of them21:03:47
@emilazy:matrix.orgemilykind of?21:03:48
@emilazy:matrix.orgemilyit's weird21:03:49
@emilazy:matrix.orgemilyI really think the GNU target-specific cross model ruined everything forever.21:04:24
@emilazy:matrix.orgemilyif Plan 9 had won everyone would be much less confused about cross.21:04:36
@dramforever:matrix.orgdramforeverit always bothers me how gnu toolchains just does this21:05:32

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