I’m trying to have tsdl package installed on windows.
$ opam --version
2.3.0
$ opam switch
# switch compiler description
→ default arch-x86_64.1,ocaml-base-compiler.5.2.1,ocaml-options-vanilla.1,system-mingw.1 ocaml >= 4.05.0
As usual with OCaml packages, everything becomes difficult when installing/linking foreign language code; SDL2 library, in this case.
According to tsdl package (opam show tsdl):
Tsdl depends on the [SDL 2.0.10][sdl] C library (or later)
I later discovered in tsdl changelog that we need 2.0.18:
$ head CHANGES.md | ag "SDL "
Require SDL >= 2.0.18.
TODO: PR against tsdl opam file
So, I’m going to try SDL 2.0.18. Unfortunately, I can’t use conf-sdl2 package without modification: it relies on depext, but cygwin package is an older version.
So, as an experiment, I’m going manually. I wonder wether if we could have conf-sdl2 (or another package) do the same thing?
SIDE STEP: because conf-wget depext is not defined for cygwin:
$ opam source conf-wget
$ cd conf-wget.1
$ cat <<FIN > wget.patch
> --- opam 2024-12-25 10:07:28.339965700 +0100
+++ opam.new 2024-12-24 17:09:48.385631000 +0100
@@ -23,4 +23,5 @@
["wget"] {os-distribution = "alpine"}
["wget"] {os-distribution = "centos"}
["wget"] {os = "freebsd"}
+ ["wget"] {os-distribution = "cygwin"}
]
FIN
$ patch < wget.patch
$ opam install .
Note: conf-wget PR submitted as Add depext for cygwin to conf-wget by ttamttam · Pull Request #27176 · ocaml/opam-repository · GitHub.
Back to SDL2. Not sure why this patch is needed?
$ opam source conf-sdl2
$ cd conf-sdl2.1
$ wget https://github.com/libsdl-org/SDL/releases/download/release-2.0.18/SDL2-devel-2.0.18-mingw.tar.gz
$ sha256sum SDL2-devel-2.0.18-mingw.tar.gz
bbad7c6947f6ca3e05292f065852ed8b62f319fc5533047e7708769c4dbae394 *SDL2-devel-2.0.18-mingw.tar.gz
$ tar xzf SDL2-devel-2.0.18-mingw.tar.gz
$ cd SDL2-2.0.18
$ cat <<FIN > pkgconfig.patch
--- x86_64-w64-mingw32/lib/pkgconfig/sdl2.pc 2021-11-30 05:24:06.000000000 +0100
+++ /usr/local/x86_64-w64-mingw32/lib/pkgconfig/sdl2.pc 2024-12-25 10:59:53.557284700 +0100
@@ -10,6 +10,6 @@
Version: 2.0.18
Requires:
Conflicts:
-Libs: -L\${libdir} -lmingw32 -lSDL2main -lSDL2 -mwindows
+Libs: -L\${libdir} -lSDL2
Libs.private: -Wl,--dynamicbase -Wl,--nxcompat -Wl,--high-entropy-va -lm -ldinput8 -ldxguid -ldxerr8 -luser32 -lgdi32 -lwinmm -limm32 -lole32 -loleaut32 -lshell32 -lsetupapi -lversion -luuid
Cflags: -I\${includedir}/SDL2 -Dmain=SDL_main
FIN
$ patch -p0 < pkgconfig.patch
$ mkdir -p /usr/local/x86_64-w64-mingw32
$ make cross
Now, tsdl:
$ opam source tsdl
$ cd tsdl.1.1.0/
$ opam install ocamlfind ocamlbuild topkg ctypes ctypes-foreign conf-pkg-config -y
Unfortunately, conf-pkg-config installs pkgconf.exe. But tsdl expects pkg-config.exe.
$ ln -s "$(dirname $(which pkgconf.exe))/pkgconf.exe" "$(dirname $(which pkgconf.exe))/pkg-config.exe"
Actual tsdl compilation:
$ ocaml pkg/pkg.ml build --tests true
Running tests one by one.
- test_audio: I don’t know how to interrupt this test. When I close the example’s window, the `Quit event is catched, but Sdl.quit(); does not return
- test_tsdl: needs some adjustments (because of warnings “-27” and “-32”, mainly). And fails in some places:
- Getting ‘Unknown sensor type’ error just after
Sdl.init Sdl.Init.everything. assert (Sdl.get_clipboard_text () = Ok "öpooo");fails. But in a strange way: I was able to retrieve and log the expected string. So, seems like it is a multithreading/synchronisation error?
- Getting ‘Unknown sensor type’ error just after
Too many issues. How could we solve them, step by step?
Best regards
Matt