Instructions on how to bootstrap Cargo

[mneumann]

I ported Rust to DragonFlyBSD. Naturally there exists no snapshot of Cargo for this platform. Would be great to provide a shell script that builds Cargo.

[alexcrichton]

We recently gained a ./configure script with --target support. Were you thinking of more extensive documentation than that? This isn't exactly a common task, so I wouldn't necessarily expect documentation for this to be front-and-center.

[mneumann]

I am getting this error:

target/snapshot/cargo-nightly/bin/cargo build --target x86_64-unknown-linux-gnu 
    Updating git repository `https://github.com/carllerche/hamcrest-rust.git`
    Updating git repository `https://github.com/burntsushi/docopt.rs`
    Updating git repository `https://github.com/alexcrichton/toml-rs`
   Compiling hamcrest v0.1.0 (https://github.com/carllerche/hamcrest-rust.git#ref=05acf768)
   Compiling toml v0.1.0 (https://github.com/alexcrichton/toml-rs#ref=a3c7f2c3)
   Compiling docopt v0.6.0 (https://github.com/BurntSushi/docopt.rs)
   Compiling docopt v0.1.0 (https://github.com/burntsushi/docopt.rs#ref=0babd54a)
   Compiling docopt_macros v0.1.0 (https://github.com/burntsushi/docopt.rs#ref=0babd54a)
   Compiling cargo v0.0.1-pre (file:/home/mneumann/cargo-build/cargo)
target/snapshot/cargo-nightly/bin/cargo build --target x86_64-unknown-dragonfly 
An unknown error occurred

Btw, I wrote a simple script to get cargo up-and-running.

[alexcrichton]

I'm going to build a new nightly tonight which will fix some of these bugs, and it should be as simple as:

./configure --target my-new-target
make
./target/my-new-target/cargo -h

[mneumann]

Thanks! That looks cool. I will try out :)

[mneumann]

@alexcrichton: Are you sure that this will work for targets like DragonFly where no snapshot exists yet? I tried it this morning and it tries to download a snapshot for x86_64-unknown-dragonfly, which of course does not exist. My main reason behind this issue was to compile cargo on "unsupported" platforms. What is the process in providing snapshots and including it into cargo?

[alexcrichton]

What did you pass through to the configure script? For example, this works for me:

./configure --target=x86_64-unknown-dragonfly

As in, that does not download a snapshot for dragonfly, just for my host platform.

[marcopeereboom]

I am running into the exact same issue an I am not finding anything useful from google. Here is my output:

$ ./configure --target=x86_64-unknown-bitrig
configure: looking for configure programs
configure: found cmp
configure: found mkdir
configure: found printf
configure: found cut
configure: found head
configure: found grep
configure: found xargs
configure: found cp
configure: found find
configure: found uname
configure: found date
configure: found tr
configure: found sed
configure: found file
configure: found cmake
configure: found pkg-config
configure: found curl
configure: recreating config.tmp
configure:
configure: processing ./configure args
configure:
configure: CFG_PREFIX := /usr/local
configure: CFG_LOCAL_RUST_ROOT :=
configure: CFG_RUSTC := /usr/local/bin/rustc (rustc 1.0.0-dev (built 2015-03-13))
configure: CFG_BUILD := x86_64-unknown-bitrig
configure: CFG_HOST := x86_64-unknown-bitrig
configure: CFG_TARGET := x86_64-unknown-bitrig
configure: CFG_LOCALSTATEDIR := /var/lib
configure: CFG_SYSCONFDIR := /etc
configure: CFG_DATADIR := /usr/local/share
configure: CFG_INFODIR := /usr/local/share/info
configure: CFG_MANDIR := /usr/local/share/man
configure: CFG_LIBDIR := /usr/local/lib
configure: CFG_LOCAL_CARGO :=
configure:
configure: validating ./configure args
configure:
configure:
configure: looking for build programs
configure:
configure: CFG_CURLORWGET := /usr/local/bin/curl (curl 7.40.0 (x86_64-unknown-bitrig1.0) libcurl/7.40.0 LibreSSL/2.0.0 zlib/1.2.3 libidn/1.29)
configure: CFG_PYTHON := /usr/local/bin/python2.7
configure: CFG_CC := /usr/bin/cc (Bitrig clang version 3.6.0 (tags/RELEASE_360/final) 20150227)
configure: CFG_RUSTDOC := /usr/local/bin/rustdoc (rustdoc 1.0.0-dev (built 2015-03-13))
configure:
configure: writing configuration
configure:
configure: CFG_SRC_DIR := /home/marco/git/rust/cargo/
configure: CFG_BUILD_DIR := /home/marco/git/rust/cargo/
configure: CFG_CONFIGURE_ARGS := --target=x86_64-unknown-bitrig
configure: CFG_PREFIX := /usr/local
configure: CFG_BUILD := x86_64-unknown-bitrig
configure: CFG_HOST := x86_64-unknown-bitrig
configure: CFG_TARGET := x86_64-unknown-bitrig
configure: CFG_LIBDIR := /usr/local/lib
configure: CFG_MANDIR := /usr/local/share/man
configure: CFG_RUSTC := /usr/local/bin/rustc
configure: CFG_RUSTDOC := /usr/local/bin/rustdoc
configure:
configure: cp /home/marco/git/rust/cargo/Makefile.in ./Makefile
configure: mv config.tmp config.mk
configure:
configure: complete
configure:
configure:
[master]$ gmake
/usr/local/bin/python2.7 src/etc/dl-snapshot.py x86_64-unknown-bitrig
Traceback (most recent call last):
File "src/etc/dl-snapshot.py", line 56, in
raise Exception("no snapshot for the triple: " + triple)
Exception: no snapshot for the triple: x86_64-unknown-bitrig
Makefile:91: recipe for target 'target/snapshot/cargo/bin/cargo' failed
gmake: *** [target/snapshot/cargo/bin/cargo] Error 1

I am looking for some doco on how to bootrap cargo straight from the git repo.