Windows build fixes (MSYS2, Cygwin, etc.) #112
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Check for META.pkg was executed even when metadir is unset - the effect is that ocamlfind install would fail if there was a META.pkg in the current directory... which happens to be the case for the num package!
They've never been used - tracking the paths we need to know about is hard enough!
Group all the commands generating findlib.conf into a single subshell invocation.
Possibly an attempt to avoid spaces or unusual characters, but somewhat dated.
Eliminate the USE_CYGPATH variable by manipulating native paths on Windows directly in configure. This has two important side-effects: 1. Native paths coming from OCaml are used directly 2. Semi-colon handling in OCaml 5.x is fixed for the Cygwin port
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I can confirm that this fixes the annoying |
This was referenced Oct 28, 2025
This was referenced Nov 1, 2025
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This PR fixes various issues:
ocamlfinddoes not build with OCaml 5.0+ on Cygwin (a build failure occurs owing to mishandling of the;inpathin the generation offindlib.conf). (GHA: Add OCaml 5.4 to the test matrix opam#6732)findlib.confis (silently) misgenerated which causes bothocamlfind listandtopfindto fail. (MSys2 fails to compile topkg.1.1.0 opam-repository#28636)ocamlfind installcontains an incorrect check forMETA.pkgeven whenmetadiris not in use (which happened to affect the non-opam installation ofnum).-sis not a necessary, nor even always valid, flag tocygpathany more and the technically the legacy command for retrieving the Standard Library is broken on old versions of OCaml.The opening commits are fairly straightforward. The last commit is fiddly, but enacts the following sequence of changes:
findlib.confis shifted from being a build operation to aconfigureoperation. That requires the tracking of the native / "Unix" version of various path variables inconfigure, but is fundamentally simpler overall, because we only have to worry about escaping the backslashes which physically go intofindlib.confand not also escaping characters which may interfere with an escapingsedexpression!tools/patchto be able to assume that it has received a native path (modulo the highly legacy stuff for the MinGW environment, but this probably ought to all be removed).Fixes Cygwin failure in ocaml/opam#6732
Closes ocaml/opam-repository#28636
cc @kit-ty-kate (opam), @jmid (opam-repository), @Leonidas-from-XIV (Dune package management)