"linking with rust-lld failed" when compiling BIOS

[HazeSystem]

I got the following error trying to build bios. I have successfully built some other examples (ferris, fs, hello_world and monkey).

error: linking with `rust-lld` failed: exit code: 1
  |
  = note: "rust-lld" "-flavor" "gnu" "C:\\Users\\renhe\\AppData\\Local\\Temp\\rustci0ZOiV\\symbols.o" "C:\\Users\\renhe\\Documents\\GitHub\\psx-sdk-rs\\examples\\target\\mipsel-sony-psx\\release\\deps\\bios-dd9b20a8139ede00.bios.59bee40b-cgu.0.rcgu.o" "C:\\Users\\renhe\\Documents\\GitHub\\psx-sdk-rs\\examples\\target\\mipsel-sony-psx\\release\\deps\\bios-dd9b20a8139ede00.5dfc63nowul9hpyw.rcgu.o" "--as-needed" "-L" "C:\\Users\\renhe\\Documents\\GitHub\\psx-sdk-rs\\examples\\target\\mipsel-sony-psx\\release\\deps" "-L" "C:\\Users\\renhe\\Documents\\GitHub\\psx-sdk-rs\\examples\\target\\release\\deps" "-L" "C:\\Users\\renhe\\Documents\\GitHub\\psx-sdk-rs\\examples\\target\\mipsel-sony-psx\\release\\build\\psx-4fa2646774207910\\out" "-L" "C:\\Users\\renhe\\.rustup\\toolchains\\nightly-x86_64-pc-windows-msvc\\lib\\rustlib\\mipsel-sony-psx\\lib" "-Bstatic" "C:\\Users\\renhe\\Documents\\GitHub\\psx-sdk-rs\\examples\\target\\mipsel-sony-psx\\release\\deps\\libbytemuck-e3e6e7a5223e4a8f.rlib" "C:\\Users\\renhe\\Documents\\GitHub\\psx-sdk-rs\\examples\\target\\mipsel-sony-psx\\release\\deps\\libpsx-cc211b81ab3b3833.rlib" "C:\\Users\\renhe\\Documents\\GitHub\\psx-sdk-rs\\examples\\target\\mipsel-sony-psx\\release\\deps\\liblinked_list_allocator-5b0b3e84bbae530b.rlib" "C:\\Users\\renhe\\Documents\\GitHub\\psx-sdk-rs\\examples\\target\\mipsel-sony-psx\\release\\deps\\liballoc-16042111529a6aac.rlib" "C:\\Users\\renhe\\Documents\\GitHub\\psx-sdk-rs\\examples\\target\\mipsel-sony-psx\\release\\deps\\librustc_std_workspace_core-9b88d97047bd756f.rlib" "C:\\Users\\renhe\\Documents\\GitHub\\psx-sdk-rs\\examples\\target\\mipsel-sony-psx\\release\\deps\\libcore-67000f1dbeeb79dc.rlib" "C:\\Users\\renhe\\Documents\\GitHub\\psx-sdk-rs\\examples\\target\\mipsel-sony-psx\\release\\deps\\libcompiler_builtins-3b687ead3f7c55ff.rlib" "-Bdynamic" "--eh-frame-hdr" "-znoexecstack" "-L" "C:\\Users\\renhe\\.rustup\\toolchains\\nightly-x86_64-pc-windows-msvc\\lib\\rustlib\\mipsel-sony-psx\\lib" "-o" "C:\\Users\\renhe\\Documents\\GitHub\\psx-sdk-rs\\examples\\target\\mipsel-sony-psx\\release\\deps\\bios-dd9b20a8139ede00.exe" "--gc-sections" "-O1" "-Tpsexe.ld" "--oformat=binary"
  = note: rust-lld: error: undefined symbol: main
          >>> referenced by psx.6664e7ff-cgu.0
          >>>               psx-cc211b81ab3b3833.psx.6664e7ff-cgu.0.rcgu.o:(__start) in archive C:\Users\renhe\Documents\GitHub\psx-sdk-rs\examples\target\mipsel-sony-psx\release\deps\libpsx-cc211b81ab3b3833.rlib


error: could not compile `bios` due to previous error

[ayrtonm]

Are you building the bios with cargo psx build --link bios.ld like in its README?

undefined symbol: main leads me to think that it's using the default psexe.ld instead of bios.ld since the former pulls in the __start function in psx/src/runtime.rs which calls an unmangled main function.

Also lld isn't supported for building the bios yet since it doesn't set the load address from the ld script correctly. cargo should use mipsel-linux-gnu-ld because it's set in examples/bios/.cargo/config.toml but if that's not getting picked you can set the CARGO_TARGET_MIPSEL_SONY_PSX_LINKER environment variable to mipsel-linux-gnu-ld or mipsel-unknown-elf-ld and cargo build psx --link bios.ld should just work.