| 21 Apr 2025 |
 Tristan Ross | So when make is calling make, the toplevel make is verbose | 00:25:09 |
| Tristan Ross | But the child make isn't | 00:25:13 |
 dramforever | i'm pretty sure that is not how makefile works | 00:25:25 |
| Tristan Ross | Well, one of the lines is literally this:
linux> make -C /build/linux-6.6.87/tools/lib/subcmd/ OUTPUT=/build/linux-6.6.87/build/tools/bpf/resolve_btfids/libsubcmd/ \
linux> DESTDIR=/build/linux-6.6.87/build/tools/bpf/resolve_btfids/libsubcmd/ AR="/nix/store/0w9bd0ljiyj2crmywkm0mvm4nwsswgb0-binutils-wrapper-2.44/bin/ar" CC="/nix/store/rpxlridr3yn6mbmd34r0bya9qv91b79s-gcc-wrapper-14.2.1.20250322/bin/cc" LD="/nix/store/0w9bd0ljiyj2crmywkm0mvm4nwsswgb0-binutils-wrapper-2.44/bin/ld" ARCH="arm64" CROSS_COMPILE="" EXTRA_CFLAGS="" prefix= subdir= \
linux> /build/linux-6.6.87/build/tools/bpf/resolve_btfids/libsubcmd/libsubcmd.a install_headers
| 00:26:03 |
| Tristan Ross | And I don't see a V=1 | 00:26:16 |
| Tristan Ross | The source is this: https://github.com/torvalds/linux/tree/v6.6/tools/bpf/resolve_btfids | 00:26:35 |
| dramforever | on one hand, V=1 is definitely passed down | 00:26:58 |
| dramforever | the way it works in linux is in the top level Makefile it actually goes, if V set in command line, set KBUILD_VERBOSE to that | 00:27:22 |
| Tristan Ross | Huh, even when it's building the host stuff? | 00:27:38 |
| dramforever | and then it sends these down in environment variablesexport quiet Q KBUILD_VERBOSE | 00:27:43 |
| dramforever | * and then it sends these down in environment variables export quiet Q KBUILD_VERBOSE | 00:27:46 |
| Tristan Ross | https://github.com/torvalds/linux/blob/v6.6/tools/bpf/resolve_btfids/Makefile#L79-L83 | 00:28:48 |
| Tristan Ross | 🤔 | 00:28:50 |
| dramforever | i am so confused | 00:30:44 |
| Tristan Ross | Me too | 00:31:20 |
| Tristan Ross | I rebased https://github.com/NixOS/nixpkgs/pull/390631 and got into this mess lol | 00:31:40 |
| Tristan Ross | Just a simple nix build .#pkgsLLVM.linux | 00:31:54 |
| dramforever | just patch the makefile | 00:32:09 |
| dramforever | print the heck out of everything | 00:32:24 |
| dramforever | idk | 00:32:27 |
| dramforever | what on earth is Build | 00:34:00 |
| Tristan Ross | Huh, Build? | 00:34:43 |
| dramforever | are the tools just in a completely different world from the rest of the kernel build system? | 00:34:57 |
| Tristan Ross | I think so | 00:35:11 |
| dramforever | https://github.com/torvalds/linux/blob/v6.6/tools/bpf/resolve_btfids/Build | 00:35:16 |
| dramforever | are these... meant to be compilable outside the kernel? | 00:35:31 |
| dramforever | lol tools/build/Makefile.build | 00:36:18 |
| dramforever | tools/: we have kbuild at home | 00:36:31 |
| dramforever | cursed | 00:37:07 |
| Tristan Ross | So my copy-paste method of rebasing didn't work lol | 00:40:04 |
