Fails to build on Windows with Clang

[aminya]

Trying to install cargo-udeps on Windows fails with these linker errors:

   liblibgit2_sys-ba969b860dee402e.rlib(refdb_fs.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(midx.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(sortedcache.o) : error LNK2001: unresolved external symbol close
          libcurl_sys-0d9aaa1630205f23.rlib(file.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(pack.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(mwindow.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(diff_file.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(hashsig.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(filter.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(odb_loose.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(commit_graph.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(indexer.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(path.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(attr_file.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(posix_w32.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(filebuf.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(blob.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(diff_generate.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(index.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(futils.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(repository.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(odb.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(checkout.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(worktree.o) : error LNK2001: unresolved external symbol close
          liblibgit2_sys-ba969b860dee402e.rlib(futils.o) : error LNK2019: unresolved external symbol umask referenced in function git_futils_mktmp
          liblibgit2_sys-ba969b860dee402e.rlib(posix.o) : error LNK2019: unresolved external symbol read referenced in function p_read
          libcurl_sys-0d9aaa1630205f23.rlib(warnless.o) : error LNK2001: unresolved external symbol read
          liblibgit2_sys-ba969b860dee402e.rlib(posix.o) : error LNK2019: unresolved external symbol write referenced in function p_write
          libcurl_sys-0d9aaa1630205f23.rlib(warnless.o) : error LNK2001: unresolved external symbol write
          libcurl_sys-0d9aaa1630205f23.rlib(vauth.o) : error LNK2001: unresolved external symbol strdup
          libcurl_sys-0d9aaa1630205f23.rlib(rename.o) : error LNK2001: unresolved external symbol strdup
          libcurl_sys-0d9aaa1630205f23.rlib(digest_sspi.o) : error LNK2001: unresolved external symbol strdup
          libcurl_sys-0d9aaa1630205f23.rlib(socks_sspi.o) : error LNK2001: unresolved external symbol strdup
          libcurl_sys-0d9aaa1630205f23.rlib(schannel_verify.o) : error LNK2001: unresolved external symbol strdup
          liblibgit2_sys-ba969b860dee402e.rlib(stdalloc.o) : error LNK2001: unresolved external symbol strdup
          libcurl_sys-0d9aaa1630205f23.rlib(easy.o) : error LNK2001: unresolved external symbol strdup
          libcurl_sys-0d9aaa1630205f23.rlib(schannel.o) : error LNK2001: unresolved external symbol strdup
          libcurl_sys-0d9aaa1630205f23.rlib(curl_sspi.o) : error LNK2001: unresolved external symbol strdup
          libcurl_sys-0d9aaa1630205f23.rlib(altsvc.o) : error LNK2019: unresolved external symbol unlink referenced in function Curl_altsvc_save
          libcurl_sys-0d9aaa1630205f23.rlib(hsts.o) : error LNK2001: unresolved external symbol unlink
          libcurl_sys-0d9aaa1630205f23.rlib(cookie.o) : error LNK2001: unresolved external symbol unlink
          C:\Users\aminy\AppData\Local\Temp\cargo-installxKwFuC\release\deps\cargo_udeps-06db0f18527d4785.exe : fatal error LNK1120: 6 unresolved externals

[est31]

@aminya that's interesting. Does it also reproduce if you clone the curl-rust repo and try the build there?

[aminya]

No, it works fine there! 🤔

[est31]

@aminya what about cargo repo then? https://github.com/rust-lang/cargo ? Or some other repo that also uses cargo: https://github.com/kbknapp/cargo-outdated

[aminya]

Cargo fails to build with the same error!
However, I think I found the issue. I always use Clang as my CC and CXX compilers. After unsetting CC and CXX, I was able to build cargo and cargo-udeps!

[est31]

Alright, great that it worked. You can file an bug at the cargo repo about the clang issue, I'm closing this as it's an upstream issue.