Pin libc to exact 0.2.186 for QNX8 compatibility#60
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libc versions >= 0.2.187 introduced an io_pkt/io_sock cfg_if split in
src/unix/nto/mod.rs with no arm for target_env="nto80" (QNX SDP 8),
causing a panic!("Unsupported arch") compile error for QNX8 targets
whose rustc still reports target_os="nto" (see rust-lang/libc#5241 and
rust-lang/rust#158449 for the eventual upstream QNX8 target rename that
libc expects).
The previous "0.2.186" version spec is a caret/minimum requirement, so
crate_universe re-resolution could still silently pick a newer, broken
libc release. Pin it exactly to prevent that.
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dcalavrezo-qorix
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LittleHuba
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score_crates only constrained libc to a minimum version ("0.2.186"),
so a routine crate_universe re-resolution could silently pick up a
newer, broken libc release: since libc 0.2.187 (the io_pkt/io_sock
split added upstream, see rust-lang/libc#5241 tracking QNX SDP 8
support) the `target_env = "nto80"` case falls through to
`panic!("Unsupported arch")` in src/unix/nto/mod.rs, because our
current Ferrocene rustc still reports `target_os = "nto"` (not the
newer `target_os = "qnx"` introduced by rust-lang/rust#158449, which
our toolchain predates). This commit exactly pins libc to "=0.2.186",
the last known-good release for our QNX8 target
(eclipse-score/score-crates#60, not yet
released/tagged).
LittleHuba
added a commit
to eclipse-score/communication
that referenced
this pull request
Jul 24, 2026
score_crates only constrained libc to a minimum version ("0.2.186"),
so a routine crate_universe re-resolution could silently pick up a
newer, broken libc release: since libc 0.2.187 (the io_pkt/io_sock
split added upstream, see rust-lang/libc#5241 tracking QNX SDP 8
support) the `target_env = "nto80"` case falls through to
`panic!("Unsupported arch")` in src/unix/nto/mod.rs, because our
current Ferrocene rustc still reports `target_os = "nto"` (not the
newer `target_os = "qnx"` introduced by rust-lang/rust#158449, which
our toolchain predates). This commit exactly pins libc to "=0.2.186",
the last known-good release for our QNX8 target
(eclipse-score/score-crates#60, not yet
released/tagged).
LittleHuba
added a commit
to eclipse-score/communication
that referenced
this pull request
Jul 24, 2026
score_crates only constrained libc to a minimum version ("0.2.186"),
so a routine crate_universe re-resolution could silently pick up a
newer, broken libc release: since libc 0.2.187 (the io_pkt/io_sock
split added upstream, see rust-lang/libc#5241 tracking QNX SDP 8
support) the `target_env = "nto80"` case falls through to
`panic!("Unsupported arch")` in src/unix/nto/mod.rs, because our
current Ferrocene rustc still reports `target_os = "nto"` (not the
newer `target_os = "qnx"` introduced by rust-lang/rust#158449, which
our toolchain predates). This commit exactly pins libc to "=0.2.186",
the last known-good release for our QNX8 target
(eclipse-score/score-crates#60, not yet
released/tagged).
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libc versions >= 0.2.187 introduced an
io_pkt/io_sockcfg_if split insrc/unix/nto/mod.rswith no arm fortarget_env = "nto80"(QNX SDP 8), causing apanic!("Unsupported arch")compile error for QNX8 targets whose rustc still reportstarget_os = "nto"(see rust-lang/libc#5241 and rust-lang/rust#158449 for the eventual upstream QNX8 target rename that libc expects).The previous
"0.2.186"version spec is a caret/minimum requirement, so a routinecrate_universere-resolution could still silently pick a newer, broken libc release (this is exactly what happened in eclipse-score/communication). Pin it exactly ("=0.2.186") to prevent that until the toolchain and libc are updated in lockstep to support the renamed QNX8 target.