Installing cargo-leptos on my machine (windows) causes a linker error?

Question

I've been trying to install cargo-leptos on my machine. I've installed it without issues on another machine before (also windows) but now I'm running into some issues.

When I run

cargo install --locked cargo-leptos everything seems to compile fine up until it tries to build cargo-leptos (bin)

After that, the install fails with this error:

error: linking with `x86_64-w64-mingw32-gcc` failed: exit code: 1
  |
  = note: "x86_64-w64-mingw32-gcc" "-fno-use-linker-plugin" "-Wl,--dynamicbase" "-Wl,--disable-auto-image-base" "-m64" "-Wl,--high-entropy-va" "<sysroot>\\lib\\rustlib\\x86_64-pc-windows-gnu\\lib\\rsbegin.o" "C:\\Users\\ELIJAH~1\\AppData\\Local\\Temp\\rustcVKF0uP\\symbols.o" "<1 object files omitted>" "-Wl,-Bstatic" "C:\\Users\\ELIJAH~1\\AppData\\Local\\Temp\\rustcVKF0uP/{libwindows_strings-9e938c87243a8807.rlib,libwindows_result-587511ed53959467.rlib,libring-b148c0998e7ffe4f.rlib,libwasm_opt_cxx_sys-9a3559f22ee7229d.rlib,libwasm_opt_sys-0c9166593a730986.rlib,libcxx-b0c96df18ac0cb8e.rlib,liblink_cplusplus-94c74ccf6784a8f4.rlib,libchrono-b32e1a0da14dbf54.rlib,libstacker-b1045a81716e4419.rlib,libpsm-14e9ae13f2c43ed9.rlib,libproc_macro-492aa1eb31f42058.rlib,libgetrandom-269e21c4ebdd8eb1.rlib,liblibgit2_sys-0ea272955479d717.rlib,liblibssh2_sys-096d8affa520be93.rlib,liblibz_sys-fc3f750804760aff.rlib,libstd-0571dc2878ba5cea.rlib,libpanic_unwind-9950fa4b65ca944f.rlib,libobject-bb7afc90598c48a8.rlib,libmemchr-5a748fa78171472a.rlib,libaddr2line-a65aadb6f7926ec8.rlib,libgimli-229a974ea5ae125d.rlib,libwindows_targets-8de7f376fe97e72b.rlib,librustc_demangle-1286c4d86cb708a0.rlib,libstd_detect-e24aed5e6146d4ea.rlib,libhashbrown-d6d5b33c17665939.rlib,librustc_std_workspace_alloc-b4e4d80d69d1f628.rlib,libminiz_oxide-4c25270a42158ecc.rlib,libadler2-739d7154ee9ea431.rlib,libunwind-49b861ae16fcb6da.rlib,libcfg_if-a98ac491dd5e8a3d.rlib,liblibc-ea336b74ce0566d8.rlib,liballoc-c19b25752f7a3d6b.rlib,librustc_std_workspace_core-3fa6d154b11615b4.rlib,libcore-f5bfb3409411ed67.rlib}.rlib" "<sysroot>\\lib\\rustlib\\x86_64-pc-windows-gnu\\lib/{libcompiler_builtins-*}.rlib" "-Wl,-Bdynamic" "-ladvapi32" "-lkernel32" "-lktmw32" "-luser32" "-lwindows.0.52.0" "-lwindows.0.53.0" "-lstdc++" "-lbcrypt" "-ladvapi32" "-lwinapi_gdi32" "-lwinapi_kernel32" "-lwinapi_msimg32" "-lwinapi_opengl32" "-lwinapi_winspool" "-lwinhttp" "-lrpcrt4" "-lole32" "-lcrypt32" "-lsecur32" "-ladvapi32" "-lbcrypt" "-lcrypt32" "-luser32" "-lntdll" "-lwindows.0.52.0" "-lwindows.0.52.0" "-lwindows.0.52.0" "-lkernel32" "-lkernel32" "-lntdll" "-luserenv" "-lws2_32" "-ldbghelp" "-lgcc_eh" "-l:libpthread.a" "-lmsvcrt" "-lmingwex" "-lmingw32" "-lgcc" "-lmsvcrt" "-lmingwex" "-luser32" "-lkernel32" "-Wl,--nxcompat" "-L" "C:\\Users\\Elijah Ang\\.cargo\\registry\\src\\index.crates.io-1949cf8c6b5b557f\\windows_x86_64_gnu-0.52.6\\lib" "-L" "C:\\Users\\ELIJAH~1\\AppData\\Local\\Temp\\cargo-installyDBnGu\\release\\build\\libgit2-sys-7bcd4239acba6b23\\out\\build" "-L" "C:\\Users\\ELIJAH~1\\AppData\\Local\\Temp\\cargo-installyDBnGu\\release\\build\\libssh2-sys-b1603e8abf333cde\\out\\build" "-L" "C:/tools/msys64/mingw64/bin/../lib" "-L" "C:\\Users\\ELIJAH~1\\AppData\\Local\\Temp\\cargo-installyDBnGu\\release\\build\\libz-sys-19dd14139921c0f3\\out\\lib" "-L" "C:\\Users\\ELIJAH~1\\AppData\\Local\\Temp\\cargo-installyDBnGu\\release\\build\\libz-sys-19dd14139921c0f3\\out\\lib" "-L" "C:\\Users\\Elijah Ang\\.cargo\\registry\\src\\index.crates.io-1949cf8c6b5b557f\\winapi-x86_64-pc-windows-gnu-0.4.0\\lib" "-L" "C:\\tools\\msys64\\mingw64\\lib" "-L" "C:\\Users\\ELIJAH~1\\AppData\\Local\\Temp\\cargo-installyDBnGu\\release\\build\\ring-b5e2089bd1791c64\\out" "-L" "C:\\Users\\Elijah Ang\\.cargo\\registry\\src\\index.crates.io-1949cf8c6b5b557f\\windows_x86_64_gnu-0.53.0\\lib" "-L" "C:\\Users\\ELIJAH~1\\AppData\\Local\\Temp\\cargo-installyDBnGu\\release\\build\\stacker-daf92462b71d6a64\\out" "-L" "C:\\Users\\ELIJAH~1\\AppData\\Local\\Temp\\cargo-installyDBnGu\\release\\build\\psm-1a7cbc46a8f04345\\out" "-L" "C:\\Users\\ELIJAH~1\\AppData\\Local\\Temp\\cargo-installyDBnGu\\release\\build\\wasm-opt-cxx-sys-9c0da407b25a9541\\out" "-L" "C:\\Users\\ELIJAH~1\\AppData\\Local\\Temp\\cargo-installyDBnGu\\release\\build\\cxx-ee405e816deee2a4\\out" "-L" "C:\\Users\\ELIJAH~1\\AppData\\Local\\Temp\\cargo-installyDBnGu\\release\\build\\link-cplusplus-fd3e66e4a51cf297\\out" "-L" "C:\\Users\\ELIJAH~1\\AppData\\Local\\Temp\\cargo-installyDBnGu\\release\\build\\wasm-opt-sys-ed928466be6cb2fd\\out" "-o" "C:\\Users\\ELIJAH~1\\AppData\\Local\\Temp\\cargo-installyDBnGu\\release\\deps\\cargo_leptos-c799e4a2d18dfdc7.exe" "-Wl,--gc-sections" "-no-pie" "-Wl,-O1" "-Wl,--strip-debug" "-nodefaultlibs" "<sysroot>\\lib\\rustlib\\x86_64-pc-windows-gnu\\lib\\rsend.o"
  = note: some arguments are omitted. use `--verbose` to show all linker arguments
  = note: C:/tools/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/14.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\ELIJAH~1\AppData\Local\Temp\rustcVKF0uP\libwasm_opt_sys-0c9166593a730986.rlib(8a4a3ecfb9b47c67-wasm-validator.o):wasm-validator:(.text$_ZN4wasm4Pass13runOnFunctionEPNS_6ModuleEPNS_8FunctionE[.text$_ZN4wasm4Pass13runOnFunctionEPNS_6ModuleEPNS_8FunctionE]+0x0): multiple definition of `wasm::Pass::runOnFunction(wasm::Module*, wasm::Function*)'; C:\Users\ELIJAH~1\AppData\Local\Temp\rustcVKF0uP\libwasm_opt_cxx_sys-9a3559f22ee7229d.rlib(6a65131bdc4b0de2-lib.rs.o):lib.rs.cc:(.text$_ZN4wasm4Pass13runOnFunctionEPNS_6ModuleEPNS_8FunctionE[_ZN4wasm4Pass13runOnFunctionEPNS_6ModuleEPNS_8FunctionE]+0x0): first defined here␍
          C:/tools/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/14.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\ELIJAH~1\AppData\Local\Temp\rustcVKF0uP\libwasm_opt_sys-0c9166593a730986.rlib(8a4a3ecfb9b47c67-wasm-validator.o):wasm-validator:(.text$_ZN4wasm4Pass3runEPNS_6ModuleE[.text$_ZN4wasm4Pass3runEPNS_6ModuleE]+0x0): multiple definition of `wasm::Pass::run(wasm::Module*)'; C:\Users\ELIJAH~1\AppData\Local\Temp\rustcVKF0uP\libwasm_opt_cxx_sys-9a3559f22ee7229d.rlib(6a65131bdc4b0de2-lib.rs.o):lib.rs.cc:(.text$_ZN4wasm4Pass3runEPNS_6ModuleE[_ZN4wasm4Pass3runEPNS_6ModuleE]+0x0): first defined here␍
          C:/tools/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/14.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\ELIJAH~1\AppData\Local\Temp\rustcVKF0uP\libwasm_opt_sys-0c9166593a730986.rlib(8a4a3ecfb9b47c67-wasm-validator.o):wasm-validator:(.text$_ZN4wasm4Pass6createEv[.text$_ZN4wasm4Pass6createEv]+0x0): multiple definition of `wasm::Pass::create()'; C:\Users\ELIJAH~1\AppData\Local\Temp\rustcVKF0uP\libwasm_opt_cxx_sys-9a3559f22ee7229d.rlib(6a65131bdc4b0de2-lib.rs.o):lib.rs.cc:(.text$_ZN4wasm4Pass6createEv[_ZN4wasm4Pass6createEv]+0x0): first defined here␍
          collect2.exe: error: ld returned 1 exit status

Which is a bit of a handful, but after parsing out the error a bit (with the help of ChatGPT), I think it boils down to multiple definitions of

wasm::Pass::runOnFunction(wasm::Module*, wasm::Function*)
wasm::Pass::run(wasm::Module*)
wasm::Pass::create()

in both libwasm_opt_sys-0c9166593a730986.rlib and libwasm_opt_cxx_sys-9a3559f22ee7229d.rlib.

(Should this be an issue in wasm-opt instead?)

If you need this info, I'm using the 64 bit GNU toolchain of Rust (x86_64-pc-windows-gnu) where I installed gcc with MSYS2 and MSYS2 with Chocolatey.

I think I'm most likely doing something wrong on my end, and I apologize, but I'd appreciate any help!

Thanks

P. S. Previously, I ran into some errors with openssl-sys not compiling properly. Maybe it's related?

https://users.rust-lang.org/t/how-do-you-fix-cargo-leptos-installation-errors-because-of-openssl-sys/129752/2?u=eliaxelang007

I have a hunch that because I set these environment variables:

OPENSSL_INCLUDE_DIR="C:\tools\msys64\mingw64\include" OPENSSL_LIB_DIR="C:\tools\msys64\mingw64\lib"

openssl-sys is including all the headers from C:\tools\msys64\mingw64\include and linking all the libraries from C:\tools\msys64\mingw64\lib and it's somehow messing with wasm-opt, but I have no proof to back that up.

You have two versions of the wasm_opt_cxx_sys crate that conflict with each other. Not sure why though. — Jmb
– Jmb, Commented May 21 at 12:11
If it worked fine once, then the issue is with files on the second machine. You may be able to copy the working install or at least the libs that worked. — Abel
– Abel, Commented May 21 at 12:11
@Jmb, do you think one of my other cargo installations has a different version of wasm_opt_cxx_sys that's conflicting with cargo-leptos's? Or is that not a thing that's possible? I have rust-script v0.34.0, tauri-cli v2.0.4, trunk v0.21.1, and wasm-bindgen-cli v0.2.95 installed. — eliaxelang007
– eliaxelang007, Commented May 21 at 23:42

eliaxelang007 · Accepted Answer · 2025-05-22 01:24:09Z

0

This isn't really a great answer to my initial question, but I downloaded cargo-leptos through cargo-binstall and it seems to work fine.

https://github.com/cargo-bins/cargo-binstall

The original issue is still unresolved, but if you need a quick way to set cargo-leptos up, cargo-binstall might work for you.

answered May 22 at 1:24

eliaxelang007

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