[Pkg-rust-maintainers] Bug#998011: rustc breaks meson autopkgtest: undefined reference to `fma'

[Paul Gevers]

Source: rustc, meson
Control: found -1 rustc/1.56.0+dfsg1-2
Control: found -1 meson/0.59.2-1
Severity: serious
Tags: sid bookworm
X-Debbugs-CC: debian-ci at lists.debian.org
User: debian-ci at lists.debian.org
Usertags: breaks needs-update

Dear maintainer(s),

With a recent upload of rustc the autopkgtest of meson fails in testing
when that autopkgtest is run with the binary packages of rustc from
unstable. It passes when run with only packages from testing. In tabular
form:

                       pass            fail
rustc                  from testing    1.56.0+dfsg1-2
meson                  from testing    0.59.2-1
versioned deps [0]     from testing    from unstable
all others             from testing    from testing

I copied some of the output at the bottom of this report.

Currently this regression is blocking the migration of rustc to testing
[1]. Due to the nature of this issue, I filed this bug report against
both packages. Can you please investigate the situation and reassign the
bug to the right package?

More information about this bug and the reason for filing it can be found on
https://wiki.debian.org/ContinuousIntegration/RegressionEmailInformation

Paul

[0] You can see what packages were added from the second line of the log
file quoted below. The migration software adds source package from
unstable to the list if they are needed to install packages from
rustc/1.56.0+dfsg1-2. I.e. due to versioned dependencies or
breaks/conflicts.
[1] https://qa.debian.org/excuses.php?package=rustc

https://ci.debian.net/data/autopkgtest/testing/amd64/m/meson/16267457/log.gz

The Meson build system
Version: 0.59.2
Source dir: /tmp/autopkgtest-lxc.868hskgl/downtmp/build.URn/src/test
cases/rust/5 polyglot static
Build dir: /tmp/autopkgtest-lxc.868hskgl/downtmp/build.URn/src/b 538284a9dc
Build type: native build
Project name: static rust and c polyglot executable
Project version: undefined
C compiler for the host machine: cc (gcc 10.3.0 "cc (Debian 10.3.0-11)
10.3.0")
C linker for the host machine: cc ld.bfd 2.37
Rust compiler for the host machine: rustc -C linker=cc (rustc 1.56.0)
Rust linker for the host machine: rustc -C linker=cc ld.bfd 2.37
Host machine cpu family: x86_64
Host machine cpu: x86_64
Library dl found: YES
Run-time dependency threads found: YES
Build targets in project: 2

Found ninja-1.10.1 at /usr/bin/ninja
[1/3] Compiling C object prog.p/prog.c.o
[2/3] Compiling Rust source '../test cases/rust/5 polyglot static/stuff.rs'
[3/3] Linking target prog
FAILED: prog cc  -o prog prog.p/prog.c.o -Wl,--as-needed
-Wl,--no-undefined -Wl,--start-group libstuff.a -ldl -Wl,--end-group
-pthread
/usr/bin/ld: libstuff.a(std-80e93fdce0e07191.std.9561c7b1-cgu.5.rcgu.o):
in function `std::f64::<impl f64>::lerp':
/usr/src/rustc-1.56.0//library/std/src/f64.rs:(.text._ZN3std3f6421_$LT$impl$u20$f64$GT$4lerp17h11b1be7b614aa463E+0x22):
undefined reference to `fma'
/usr/bin/ld: libstuff.a(std-80e93fdce0e07191.std.9561c7b1-cgu.6.rcgu.o):
in function `std::f32::<impl f32>::lerp':
/usr/src/rustc-1.56.0//library/std/src/f32.rs:(.text._ZN3std3f3221_$LT$impl$u20$f32$GT$4lerp17he122406d489ebe9dE+0x20):
undefined reference to `fmaf'
collect2: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.

ninja explain: deps for 'libstuff.a' are missing
ninja explain: libstuff.a is dirty
ninja explain: deps for 'prog.p/prog.c.o' are missing
ninja explain: prog.p/prog.c.o is dirty
ninja explain: libstuff.a is dirty
ninja explain: prog is dirty

autopkgtest [11:37:48]: test exhaustive


-------------- next part --------------
A non-text attachment was scrubbed...
Name: OpenPGP_signature
Type: application/pgp-signature
Size: 495 bytes
Desc: OpenPGP digital signature
URL: <http://alioth-lists.debian.net/pipermail/pkg-rust-maintainers/attachments/20211028/3122cd1b/attachment-0001.sig>