boost: limit concurrent jobs to the maximum supported number

[andrew-d]

Motivation for this change

Versions of b2 before 1.65 have job limits; specifically:

• Versions before 1.58 support up to 64 jobs
• Versions before 1.65 support up to 256 jobs

You can see from the build failures that we appear to be running into this error

/cc ZHF #45960

(sent to staging under the assumption that this will be a huge rebuild...)

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Fits CONTRIBUTING.md.

---

cc @peti @wkennington

[Mic92]

This can be merged on master right-away. <100 packages is ok.

[andrew-d]

Ah, good to know! Just switched the base branch and force-pushed 👍

[xeji]

Let's build one each of the 3 cases
@GrahamcOfBorg build boost155 boost164 boost167

[GrahamcOfBorg]

Failure on x86_64-darwin (full log)

Attempted: boost155, boost164, boost167

Partial log (click to expand)

/nix/store/pg5rpi0n4wbgwfy57av3apr48r4lz9fx-stdenv-darwin/setup: fork: retry: Resource temporarily unavailable
/nix/store/pg5rpi0n4wbgwfy57av3apr48r4lz9fx-stdenv-darwin/setup: fork: retry: Resource temporarily unavailable
/nix/store/pg5rpi0n4wbgwfy57av3apr48r4lz9fx-stdenv-darwin/setup: fork: retry: Resource temporarily unavailable
/nix/store/pg5rpi0n4wbgwfy57av3apr48r4lz9fx-stdenv-darwin/setup: fork: retry: Resource temporarily unavailable
/nix/store/pg5rpi0n4wbgwfy57av3apr48r4lz9fx-stdenv-darwin/setup: fork: retry: Resource temporarily unavailable
/nix/store/pg5rpi0n4wbgwfy57av3apr48r4lz9fx-stdenv-darwin/setup: fork: retry: Resource temporarily unavailable
/nix/store/pg5rpi0n4wbgwfy57av3apr48r4lz9fx-stdenv-darwin/setup: fork: Resource temporarily unavailable
builder for '/nix/store/7d63adbz38zm8qp49lb4m8b7n7z84fwh-boost-1.55.0.drv' failed with exit code 254
builder for '/nix/store/gg7yplard6lfwm73zwvw024y244glkls-boost-1.64.0.drv' failed with exit code 254
error: build of '/nix/store/7d63adbz38zm8qp49lb4m8b7n7z84fwh-boost-1.55.0.drv', '/nix/store/gg7yplard6lfwm73zwvw024y244glkls-boost-1.64.0.drv' failed

[xeji]

One darwin builder has had this issue since yesterday.

[GrahamcOfBorg]

Failure on aarch64-linux (full log)

Attempted: boost155, boost164, boost167

Partial log (click to expand)

common.copy stage/lib/libboost_program_options.so.1.55.0
ln-UNIX stage/lib/libboost_program_options.so
...failed updating 3 targets...
...skipped 6 targets...
...updated 556 targets...
builder for '/nix/store/jbi31dss11irrbm3aln9q8q4dnwb8ha5-boost-1.55.0.drv' failed with exit code 1
strip is /nix/store/y4ymnvgxygpq05h03kyzbj572zmh6zla-binutils-2.30/bin/strip
patching script interpreter paths in /nix/store/djk3jcaya81wgcj8mizfskxn57a853h6-boost-1.64.0-dev
checking for references to /build in /nix/store/djk3jcaya81wgcj8mizfskxn57a853h6-boost-1.64.0-dev...
error: build of '/nix/store/jbi31dss11irrbm3aln9q8q4dnwb8ha5-boost-1.55.0.drv' failed

[GrahamcOfBorg]

Success on x86_64-linux (full log)

Attempted: boost155, boost164, boost167

Partial log (click to expand)

stripping (with command strip and flags -S) in /nix/store/dpb90r2m88b4np5vgwcs0y9cnw6j1pss-boost-1.64.0/lib
patching script interpreter paths in /nix/store/dpb90r2m88b4np5vgwcs0y9cnw6j1pss-boost-1.64.0
checking for references to /build in /nix/store/dpb90r2m88b4np5vgwcs0y9cnw6j1pss-boost-1.64.0...
shrinking RPATHs of ELF executables and libraries in /nix/store/2djdwhq9g8jv63yz238k3i7qc04k1b2z-boost-1.64.0-dev
strip is /nix/store/h0lbngpv6ln56hjj59i6l77vxq25flbz-binutils-2.30/bin/strip
patching script interpreter paths in /nix/store/2djdwhq9g8jv63yz238k3i7qc04k1b2z-boost-1.64.0-dev
checking for references to /build in /nix/store/2djdwhq9g8jv63yz238k3i7qc04k1b2z-boost-1.64.0-dev...
/nix/store/jg1x98kz9ihcs6cwwvyr043kykwf4ba6-boost-1.55.0
/nix/store/dpb90r2m88b4np5vgwcs0y9cnw6j1pss-boost-1.64.0
/nix/store/3l5yykp2apm5q897nhwxjxh8vfjlpvs2-boost-1.67_0

[xeji]

boost155 is broken on aarch64 ... Anyway, looks good.

[xeji]

backported: 35271fd

[andrew-d]

Thanks!