Rustc-1.58.1

Installation of Rust

To install into the /opt directory, remove the symlink and create a new directory (i.e. with a different name if trying a modified build). As the root user:

mkdir /opt/rustc-1.58.1             &&
ln -svfin rustc-1.58.1 /opt/rustc

Note

If multiple versions of Rust are installed in /opt, changing to another version only requires changing the /opt/rustc symbolic link and then running ldconfig.

Create a suitable config.toml file which will configure the build.

cat << EOF > config.toml
# see config.toml.example for more possible options
# See the 8.4 book for an example using shipped LLVM
# e.g. if not installing clang, or using a version before 10.0
[llvm]
# by default, rust will build for a myriad of architectures
targets = "X86"

# When using system llvm prefer shared libraries
link-shared = true

[build]
# omit docs to save time and space (default is to build them)
docs = false

# install cargo as well as rust
extended = true

[install]
prefix = "/opt/rustc-1.58.1"
docdir = "share/doc/rustc-1.58.1"

[rust]
channel = "stable"
rpath = false

# BLFS does not install the FileCheck executable from llvm,
# so disable codegen tests
codegen-tests = false

[target.x86_64-unknown-linux-gnu]
# NB the output of llvm-config (i.e. help options) may be
# dumped to the screen when config.toml is parsed.
llvm-config = "/usr/bin/llvm-config"

[target.i686-unknown-linux-gnu]
# NB the output of llvm-config (i.e. help options) may be
# dumped to the screen when config.toml is parsed.
llvm-config = "/usr/bin/llvm-config"


EOF

Compile Rust by running the following commands:

export RUSTFLAGS="$RUSTFLAGS -C link-args=-lffi" &&
python3 ./x.py build --exclude src/tools/miri

Note

The testsuite will generate some messages in the systemd journal for traps on invalid opcodes, and for segmentation faults. In themselves these are nothing to worry about, just a way for the test to be terminated.

To run the tests issue python3 ./x.py test --verbose --no-fail-fast | tee rustc-testlog: as with the build, that will use all available CPUs.

At a minimum, 49 tests will fail: all 48 of the tests in the “assembly” suite which are not skipped (various lints cause the warnings in these tests to be treated as errors), and run-make-fulldeps/long-linker-command-lines.

As with all large testsuites, other tests might fail on some machines - if the number of additional failures is in the single digits, check the log for 'failures:' and review lines above that, particularly the 'stderr:' lines. Any mention of SIGSEGV or signal 11 in a failing test is a cause for concern.

If you get any other failing test which reports an issue number then you should search for that issue. For example, when rustc >= 1.41.1 was built with a version of sysllvm before 10.0 the test for issue 69225 failed https://github.com/rust-lang/rust/issues/69225 and that should be regarded as a critical failure (they released 1.41.1 because of it). Most other failures will not be critical.

Therefore, you should determine the number of failures.

The number of tests which failed can be found by running:

grep '^test result:' rustc-testlog | awk  '{ sum += $6 } END { print sum }'

And similarly if you care about how many tests passed use $4, for those which were ignored (i.e. skipped) use $8 (and $10 for 'measured', $12 for 'filtered out' but both are probably zero).

Still as your normal user, do a DESTDIR install:

export LIBSSH2_SYS_USE_PKG_CONFIG=1 &&
DESTDIR=${PWD}/install python3 ./x.py install &&
unset LIBSSH2_SYS_USE_PKG_CONFIG

Now, as the root user install the files from the DESTDIR:

chown -R root:root install &&
cp -a install/* /