rustup target add sparcv9-sun-solaris
cargo new --bin hello && cd hello && cargo run --target=sparcv9-sun-solaris

C:\git\hello>cargo run --target=sparcv9-sun-solaris
   Compiling hello v0.1.0 (C:\git\hello)
error: linking with `gcc` failed: exit code: 1
  |
  = note: "gcc" "-m64" "-L" "C:\\Users\\brief\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\sparcv9-sun-solaris\\lib" "C:\\git\\hello\\target\\sparcv9-sun-solaris\\debug\\deps\\hello-5a8c9dc823b47100.16tanzbuse5clmtl.rcgu.o" "C:\\git\\hello\\target\\sparcv9-sun-solaris\\debug\\deps\\hello-5a8c9dc823b47100.213ariqv7amnemx1.rcgu.o" "C:\\git\\hello\\target\\sparcv9-sun-solaris\\debug\\deps\\hello-5a8c9dc823b47100.2gx8yv0j0sk9qren.rcgu.o" "C:\\git\\hello\\target\\sparcv9-sun-solaris\\debug\\deps\\hello-5a8c9dc823b47100.3arptv49ej9zmj7t.rcgu.o" "C:\\git\\hello\\target\\sparcv9-sun-solaris\\debug\\deps\\hello-5a8c9dc823b47100.3br1bpaovzl5ifag.rcgu.o" "C:\\git\\hello\\target\\sparcv9-sun-solaris\\debug\\deps\\hello-5a8c9dc823b47100.3j4sjvxpf4kzlk20.rcgu.o" "C:\\git\\hello\\target\\sparcv9-sun-solaris\\debug\\deps\\hello-5a8c9dc823b47100.3raza3336vmbyk5a.rcgu.o" "C:\\git\\hello\\target\\sparcv9-sun-solaris\\debug\\deps\\hello-5a8c9dc823b47100.54a5fojyldkdi94l.rcgu.o" "-o" "C:\\git\\hello\\target\\sparcv9-sun-solaris\\debug\\deps\\hello-5a8c9dc823b47100" "C:\\git\\hello\\target\\sparcv9-sun-solaris\\debug\\deps\\hello-5a8c9dc823b47100.4t2cg6ozspc1xwt7.rcgu.o" "-Wl,-zignore" "-nodefaultlibs" "-L" "C:\\git\\hello\\target\\sparcv9-sun-solaris\\debug\\deps" "-L" "C:\\git\\hello\\target\\debug\\deps" "-L" "C:\\Users\\brief\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\sparcv9-sun-solaris\\lib" "-Wl,--start-group" "-Wl,-Bstatic" "C:\\Users\\brief\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\sparcv9-sun-solaris\\lib\\libstd-c241dc3a737d5e51.rlib" "C:\\Users\\brief\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\sparcv9-sun-solaris\\lib\\libpanic_unwind-9daf35af2073faa7.rlib" "C:\\Users\\brief\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\sparcv9-sun-solaris\\lib\\libminiz_oxide-36601c43420211d7.rlib" "C:\\Users\\brief\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\sparcv9-sun-solaris\\lib\\libadler-855241155c1f03da.rlib" "C:\\Users\\brief\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\sparcv9-sun-solaris\\lib\\libobject-d7c656c4ec5c8357.rlib" "C:\\Users\\brief\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\sparcv9-sun-solaris\\lib\\libaddr2line-b77a478db5572f82.rlib" "C:\\Users\\brief\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\sparcv9-sun-solaris\\lib\\libgimli-860eaed4446805b5.rlib" "C:\\Users\\brief\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\sparcv9-sun-solaris\\lib\\librustc_demangle-7769662dcf2099a5.rlib" "C:\\Users\\brief\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\sparcv9-sun-solaris\\lib\\libhashbrown-bfe1ecd1473e2ace.rlib" "C:\\Users\\brief\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\sparcv9-sun-solaris\\lib\\librustc_std_workspace_alloc-2ed53cd2b117a62e.rlib" "C:\\Users\\brief\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\sparcv9-sun-solaris\\lib\\libunwind-28f09d6b3078d53f.rlib" "C:\\Users\\brief\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\sparcv9-sun-solaris\\lib\\libcfg_if-52f1f3ea28f62fca.rlib" "C:\\Users\\brief\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\sparcv9-sun-solaris\\lib\\liblibc-3c5e8c862bafe903.rlib" "C:\\Users\\brief\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\sparcv9-sun-solaris\\lib\\liballoc-3dfa7899a026edd0.rlib" "C:\\Users\\brief\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\sparcv9-sun-solaris\\lib\\librustc_std_workspace_core-59a3391d32496e20.rlib" "C:\\Users\\brief\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\sparcv9-sun-solaris\\lib\\libcore-1840907aed784f3c.rlib" "-Wl,--end-group" "C:\\Users\\brief\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\sparcv9-sun-solaris\\lib\\libcompiler_builtins-9bd78a46c8a684d7.rlib" "-Wl,-Bdynamic" "-lsocket" "-lposix4" "-lpthread" "-lresolv" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread"
  = note: C:\GnuCobol3.1\bin/ld.exe: unrecognized option '-zignore'
          C:\GnuCobol3.1\bin/ld.exe: use the --help option for usage information
          collect2.exe: error: ld returned 1 exit status