Building Rust from source fails

[jimblandy]

I am unable to build a fresh checkout of rust-lang/rust following the directions in README.md on Fedora 23. (Yes, I know F23 is EOL, but the problem seems unrelated.)

sergei:rust$ git clone https://github.com/rust-lang/rust.git
Cloning into 'rust'...
remote: Counting objects: 637017, done.
remote: Compressing objects: 100% (16/16), done.
remote: Total 637017 (delta 6), reused 0 (delta 0), pack-reused 637001
Receiving objects: 100% (637017/637017), 295.85 MiB | 261.00 KiB/s, done.
Resolving deltas: 100% (513831/513831), done.
Checking connectivity... done.
sergei:rust$ cd rust
sergei:rust$ ./x.py build
downloading https://static.rust-lang.org/dist/2017-02-01/rust-std-beta-x86_64-unknown-linux-gnu.tar.gz
######################################################################## 100.0%
extracting /home/jimb/rust/rust/build/cache/2017-02-01/rust-std-beta-x86_64-unknown-linux-gnu.tar.gz
downloading https://static.rust-lang.org/dist/2017-02-01/rustc-beta-x86_64-unknown-linux-gnu.tar.gz
######################################################################## 100.0%
extracting /home/jimb/rust/rust/build/cache/2017-02-01/rustc-beta-x86_64-unknown-linux-gnu.tar.gz
downloading https://s3.amazonaws.com/rust-lang-ci/cargo-builds/bfee18f73287687c543bda8c35e4e33808792715/cargo-nightly-x86_64-unknown-linux-gnu.tar.gz
######################################################################## 100.0%
extracting /home/jimb/rust/rust/build/cache/bfee18f73287687c543bda8c35e4e33808792715/cargo-nightly-x86_64-unknown-linux-gnu.tar.gz
error: failed to read `/home/jimb/rust/rust/src/tools/cargo/Cargo.toml`

Caused by:
  No such file or directory (os error 2)
Build completed unsuccessfully in 0:00:59
sergei:rust$ git status
On branch master
Your branch is up-to-date with 'origin/master'.
nothing to commit, working directory clean
sergei:rust$ git pull
remote: Counting objects: 17, done.
remote: Compressing objects: 100% (4/4), done.
remote: Total 17 (delta 12), reused 12 (delta 12), pack-reused 1
Unpacking objects: 100% (17/17), done.
From https://github.com/rust-lang/rust
 + dd73b04...0cc7037 auto       -> origin/auto  (forced update)
Already up-to-date.
sergei:rust$ git status
On branch master
Your branch is up-to-date with 'origin/master'.
nothing to commit, working directory clean
sergei:rust$ ./x.py build
error: failed to read `/home/jimb/rust/rust/src/tools/cargo/Cargo.toml`

I believe I have the required versions of the given prerequisites:

sergei:rust$ g++ --version
g++ (GCC) 5.3.1 20160406 (Red Hat 5.3.1-6)
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

sergei:rust$ python --version
Python 2.7.11
sergei:rust$ make --version
GNU Make 4.0
Built for x86_64-redhat-linux-gnu
Copyright (C) 1988-2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
sergei:rust$ cmake --version
cmake version 3.4.3

CMake suite maintained and supported by Kitware (kitware.com/cmake).
sergei:rust$ curl --version
curl 7.43.0 (x86_64-redhat-linux-gnu) libcurl/7.43.0 NSS/3.26 zlib/1.2.8 libidn/1.33 libssh2/1.6.0 nghttp2/1.7.1
Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp 
Features: AsynchDNS IDN IPv6 Largefile GSS-API Kerberos SPNEGO NTLM NTLM_WB SSL libz HTTP2 UnixSockets Metalink 
sergei:rust$ git --version
git version 2.5.5
sergei:rust$ 

[petrochenkov]

Can be fixed by

git submodule update --init

See #39917 (comment)

[jimblandy]

Okay, it seems like this problem is being addressed in that issue. Thanks for the pointer!