Rustc-1.76.0

Installation of Rust

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

mkdir -pv /opt/rustc-1.76.0      &&
ln -svfn rustc-1.76.0 /opt/rustc

If running the test suite, apply a patch to prevent the build system from unnecessarily rebuilding the compiler:

patch -Np1 -i ../rustc-1.76.0-testsuite_fix-1.patch

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 old example using shipped LLVM
# e.g. if not installing clang, or using a version before 13.0

# Tell x.py the editors have reviewed the content of this file
# and updated it to follow the major changes of the building system,
# so x.py will not warn us to do such a review.
change-id = 118703

[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 extended tools: cargo, clippy, etc
extended = true

# Do not query new versions of dependencies online.
locked-deps = true

# Specify which extended tools (those from the default install).
tools = ["cargo", "clippy", "rustdoc", "rustfmt"]

# Use the source code shipped in the tarball for the dependencies.
# The combination of this and the "locked-deps" entry avoids downloading
# many crates from Internet, and makes the Rustc build more stable.
vendor = true

[install]
prefix = "/opt/rustc-1.76.0"
docdir = "share/doc/rustc-1.76.0"

[rust]
channel = "stable"
description = "for BLFS r12.0-1685"

# BLFS used to not install the FileCheck executable from llvm,
# so disabled codegen tests.  The assembly tests rely on FileCheck
# and cannot easily be disabled, so those will anyway fail if
# FileCheck has not been installed.
#codegen-tests = false

# Enable the same optimizations as the official upstream build.
lto = "thin"
codegen-units = 1

[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:

{ [ ! -e /usr/include/libssh2.h ] ||
  export LIBSSH2_SYS_USE_PKG_CONFIG=1; } &&
python3 x.py build

To run the tests (again using all available CPUs) issue:

SSL_CERT_DIR=/etc/ssl/certs \
python3 x.py test --verbose --no-fail-fast | tee rustc-testlog

Two tests,tests/ui/issues/issue-21763.rs and tests/debuginfo/regression-bad-location-list-67992.rs, are known to fail.

If FileCheck from LLVM has not been installed, all 47 tests from the “assembly” suite will fail.

As with all large test suites, other tests might fail on some machines - if the number of additional failures is low, 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 passed and failed can be found by running:

grep '^test result:' rustc-testlog |
 awk '{sum1 += $4; sum2 += $6} END { print sum1 " passed; " sum2 " failed" }'

The other available fields are $8 for those which were ignored (i.e. skipped), $10 for 'measured' and $12 for 'filtered out' but both those last two are probably zero.

Now, as the root user, install the package:

python3 x.py install

The building system attempts to install some files twice, and during the second attempt it renames the old one (installed in the first attempt) with the .old suffix. As the root user, remove these files:

find /opt/rustc-1.76.0 -name "*.old" -delete

Still as the root user, symlink a Zsh completion file into the correct location:

install -vdm755 /usr/share/zsh/site-functions      &&
ln -sfv /opt/rustc/share/zsh/site-functions/_cargo \
        /usr/share/zsh/site-functions

Finally, unset the LIBSSH2_SYS_USE_PKG_CONFIG variable:

unset LIBSSH2_SYS_USE_PKG_CONFIG

cat > /etc/profile.d/rustc.sh << "EOF"
# Begin /etc/profile.d/rustc.sh

pathprepend /opt/rustc/bin           PATH

# Include /opt/rustc/man in the MANPATH variable to access manual pages
pathappend  /opt/rustc/share/man     MANPATH

# End /etc/profile.d/rustc.sh
EOF

source /etc/profile.d/rustc.sh