3.20.2 build error: Error: posix_spawn(): Exec format error #12576
Description
Could someone say what might be causing this failure with Dune 3.20.x? Dune 3.19.1 builds normally on the same system with everything else identical (these were successive builds, 3.19.1 worked and 3.20.2 upgrade failed).
Expected Behavior
Build should succeed.
Actual Behavior
---> Configuring ocaml-dune
Executing: cd "/opt/local/var/macports/build/ocaml-dune-3d7a7125/work/dune-3.20.2" && ./configure --bindir /opt/local/bin --datadir /opt/local/share/ocaml-dune --docdir /opt/local/share/doc --etcdir /opt/local/etc --libdir /opt/local/lib/ocaml/site-lib --mandir /opt/local/share/man --sbindir /opt/local/sbin
---> Building ocaml-dune
Executing: cd "/opt/local/var/macports/build/ocaml-dune-3d7a7125/work/dune-3.20.2" && DUNE_CONFIG__COPY_FILE=portable /usr/bin/make release
ocamlc -output-complete-exe -g -o .duneboot.exe -I boot unix.cma boot/[libs.ml](http://libs.ml/) boot/[duneboot.ml](http://duneboot.ml/)
./.duneboot.exe
Error: posix_spawn(): Exec format error
-> required by _build/default/doc/dune-cache.1
-> required by _build/install/default/man/man1/dune-cache.1
-> required by _build/default/dune.install
-> required by alias install
make: *** [release] Error 1
Command failed: cd "/opt/local/var/macports/build/ocaml-dune-3d7a7125/work/dune-3.20.2" && DUNE_CONFIG__COPY_FILE=portable /usr/bin/make release
Exit code: 2
Error: Failed to build ocaml-dune: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_ppcports_ocaml_ocaml-dune/ocaml-dune/main.log for details.
Reproduction
Run the build.
Specifications
- Version of
dune(output ofdune --version): 3.20.2 - Version of
ocaml(output ofocamlc --version): 4.14.2 - Operating system (distribution and version): macOS 10.6.8
Additional information
MacPorts build env.
@rgrinberg Maybe you can suggest where to look?