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Sender	Message	Time
9 Apr 2025
K900	Our default compilers should have WASM targets I think?	04:59:58
K900	At least on unstable	05:00:01
K900	Not sure about 24.11	05:00:03
cleverca22	In reply to @k900:0upti.me At least on unstable and i'm on master, so it should work...	11:55:34
K900	How does it fail?	11:55:49
cleverca22	In reply to @k900:0upti.me How does it fail? https://github.com/paritytech/polkadot-sdk/blob/master/substrate/utils/wasm-builder/src/prerequisites.rs#L228-L250	11:56:43
cleverca22	this error is getting triggered via `build.rs`	11:56:49
cleverca22	`Rust WASM target for toolchain 0rn3apgrjdqrq6zpqsrh5b8dmlxbci42-rustc-1.85.0 is not properly installed; please install it!`	11:56:58
Alyssa Ross	Maybe the check is wrong?	12:37:34
cleverca22	error: failed to run custom build command for `name v0.2.2 (/build/name/runtime)` Caused by: process didn't exit successfully: `/build/name/target/release/build/name-aa417fbc44577df4/build-script-build` (exit status: 1) --- stderr Rust WASM target for toolchain 0rn3apgrjdqrq6zpqsrh5b8dmlxbci42-rustc-1.85.0 is not properly installed; please install it! Further error information: ------------------------------------------------------------ Compiling dummy-crate v1.0.0 (/build/.tmpvBgI1g) error: linker `lld` not found \| = note: No such file or directory (os error 2) error: could not compile `dummy-crate` (bin "dummy-crate") due to 1 previous error ------------------------------------------------------------	12:48:36
cleverca22	it looks like its trying to run the llvm linker for some reason??	12:48:47
ghpzin	I wouldn't call it "check". From linked code it seemingly tries to build their "dummy crate" inside and fails to output anything as a result around here (which I assume may not be expected to work properly inside `buildRustPackage`): https://github.com/paritytech/polkadot-sdk/blob/65441c8199ba8c9c1fe75ba4d432352109e87d43/substrate/utils/wasm-builder/src/prerequisites.rs#L211 https://github.com/paritytech/polkadot-sdk/blob/65441c8199ba8c9c1fe75ba4d432352109e87d43/substrate/utils/wasm-builder/src/prerequisites.rs#L150-L177	12:49:51
ghpzin	I wouldn't call it "check". From linked code it seemingly tries to build their "dummy crate" inside and fails to output anything as a result around here (which I assume may not be expected to work properly inside `buildRustPackage`, because it does `cargo build` with its' own things): https://github.com/paritytech/polkadot-sdk/blob/65441c8199ba8c9c1fe75ba4d432352109e87d43/substrate/utils/wasm-builder/src/prerequisites.rs#L211 https://github.com/paritytech/polkadot-sdk/blob/65441c8199ba8c9c1fe75ba4d432352109e87d43/substrate/utils/wasm-builder/src/prerequisites.rs#L150-L177	12:50:36
cleverca22	the other issue that makes things slower, is the inability of `buildRustPackage` to cache the deps	12:52:40
cleverca22	so it takes 20 minutes to reproduce the failure, after every change	12:52:49
ghpzin	Honestly I would just try to patch it out to be "noop" (always assume toolchain it tries to check is fine) and see if it is builds.	12:55:59
ghpzin	* Honestly I would just try to patch it out to be "noop" (always assume toolchain it tries to "check" is fine) and see if it is builds.	12:56:22
ghpzin	* Honestly I would just try to patch it out to be "noop" (always assume toolchain it tries to "check" is fine) and see if it builds.	12:56:28
cleverca22	In reply to @9hp71n:matrix.org Honestly I would just try to patch it out to be "noop" (always assume toolchain it tries to "check" is fine) and see if it builds. i already deleted `build.rs` and then it fails because there was no wasm output	12:56:46
cleverca22	and patching it to remove the check, i dont think will work, its just going to run cargo on the real wasm project, and then fail the same as `dummy-crate`	12:57:15
Gaétan Lepage	What is the best way to reference `release/target/x86_64-unknown-linux-gnu/release/` in the `checkPhase` for instance?	13:27:45
Gaétan Lepage	Is there a shell variable containing this?	13:27:53
Alyssa Ross	There is a variable for the system part	13:39:58
cleverca22	In reply to @k900:0upti.me How does it fail? `Cannot compile the WASM runtime: no standard library sources found at /nix/store/0rn3apgrjdqrq6zpqsrh5b8dmlxbci42-rustc-1.85.0/lib/rustlib/src/rust!` i gave it an `ldd`, and now it cant find the standard library	13:48:05
Gaétan Lepage	In reply to @qyliss:fairydust.space There is a variable for the system part I ended up using `cargoInstallHook.targetSubdirectory`	14:03:35
Gaétan Lepage	https://github.com/NixOS/nixpkgs/blob/master/pkgs/by-name/ra/rav1d/package.nix#L38-L49	14:03:37
cleverca22	[clever@thinkpad:~/iohk/midnight-node]$ ls /nix/store/0rn3apgrjdqrq6zpqsrh5b8dmlxbci42-rustc-1.85.0/lib/rustlib/wasm32-unknown-unknown/lib/ libaddr2line-75d3d0c5981cd211.rlib libcore-c8e3d79b493aee7a.rlib liblibc-279616ba3aa6b6b5.rlib libpanic_unwind-5bf15f6e79874620.rlib librustc_std_workspace_core-20597a32dbe324b7.rlib libtest-72b3932de24c9224.rlib libadler-7915b69899d8f62d.rlib libdlmalloc-82297a628a89729a.rlib libmemchr-12d9c02ac2b46e93.rlib libproc_macro-604f5a1a5a3487e6.rlib librustc_std_workspace_std-3fb1821d50d1a00e.rlib libunicode_width-f19aa74aa999edec.rlib liballoc-a55cb6cdcc7074cd.rlib libgetopts-4c1c3c48cdd30e1d.rlib libminiz_oxide-b4d4129edfbbc22f.rlib libprofiler_builtins-69ea14db5fb2290e.rlib libstd-4e586b256d6eead5.rlib libunwind-610f019430ca2de2.rlib libcfg_if-57ac834c4abeb545.rlib libgimli-10b471aa877c9dcc.rlib libobject-4bbfa37031017b9f.rlib librustc_demangle-d987a56c328827e5.rlib libstd_detect-cf3cdd655689b063.rlib libcompiler_builtins-9bfd52bc78369877.rlib libhashbrown-06aa1b00a4ac11fb.rlib libpanic_abort-91efa2f4e3051c3f.rlib librustc_std_workspace_alloc-5894bc93779fa041.rlib libsysroot-bcec41c60c9f169c.rlib	14:09:34
cleverca22	and yet, the path it gave, does have wasm32!?	14:09:52
cleverca22	* [clever@thinkpad:~/iohk/]$ ls /nix/store/0rn3apgrjdqrq6zpqsrh5b8dmlxbci42-rustc-1.85.0/lib/rustlib/wasm32-unknown-unknown/lib/ libaddr2line-75d3d0c5981cd211.rlib libcore-c8e3d79b493aee7a.rlib liblibc-279616ba3aa6b6b5.rlib libpanic_unwind-5bf15f6e79874620.rlib librustc_std_workspace_core-20597a32dbe324b7.rlib libtest-72b3932de24c9224.rlib libadler-7915b69899d8f62d.rlib libdlmalloc-82297a628a89729a.rlib libmemchr-12d9c02ac2b46e93.rlib libproc_macro-604f5a1a5a3487e6.rlib librustc_std_workspace_std-3fb1821d50d1a00e.rlib libunicode_width-f19aa74aa999edec.rlib liballoc-a55cb6cdcc7074cd.rlib libgetopts-4c1c3c48cdd30e1d.rlib libminiz_oxide-b4d4129edfbbc22f.rlib libprofiler_builtins-69ea14db5fb2290e.rlib libstd-4e586b256d6eead5.rlib libunwind-610f019430ca2de2.rlib libcfg_if-57ac834c4abeb545.rlib libgimli-10b471aa877c9dcc.rlib libobject-4bbfa37031017b9f.rlib librustc_demangle-d987a56c328827e5.rlib libstd_detect-cf3cdd655689b063.rlib libcompiler_builtins-9bfd52bc78369877.rlib libhashbrown-06aa1b00a4ac11fb.rlib libpanic_abort-91efa2f4e3051c3f.rlib librustc_std_workspace_alloc-5894bc93779fa041.rlib libsysroot-bcec41c60c9f169c.rlib	14:10:03
cleverca22	ah wait, it wants the SOURCE for wasm32!	14:11:34

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