2026-07-24 11:57.33: New job: build mlmpfr.4.2.0 (8ecb1b4ddbf3)
2026-07-24 11:57.33: Waiting for resource in pool day11-builds
2026-07-24 12:32.35: Got resource from pool day11-builds
2026-07-24 12:32.35: [profile full] build mlmpfr.4.2.0
2026-07-24 12:32.35: build mlmpfr.4.2.0 (8ecb1b4ddbf3)
=== DEPENDENCIES (12 transitive) ===
  base-threads.base                                  afe16a8e71c3
  base-unix.base                                     73c0a5fdd34a
  compiler-cloning.enabled                           22a431860256
  conf-gmp.5                                         be8168159001
  conf-mpfr.3                                        4e3a04ba0cf7
  conf-pkg-config.5                                  2c611009363a
  csexp.1.5.2                                        9b58e29a8bf1
  dune.3.24.1                                        0d2a3ba8bfb9
  dune-configurator.3.24.1                           29a4528f5159
  ocaml.5.5.0                                        af24caade1d3
  ocaml-base-compiler.5.5.0                          5f93989ce6d7
  ocaml-compiler.5.5.0                               15edcf5138e5
=== STDOUT ===
Processing: [default: loading data]
[mlmpfr.4.2.0: dl]
[mlmpfr.4.2.0: extract]
[mlmpfr.4.2.0/mlmpfr_compatibility_test.c: dl]
-> retrieved mlmpfr.4.2.0  (https://opam.ocaml.org/cache)
[mlmpfr: cc mlmpfr_compatibility_test.c]
+ /usr/bin/cc "mlmpfr_compatibility_test.c" "-lmpfr" "-o" "mlmpfr_compatibility_test" (CWD=/home/opam/.opam/default/.opam-switch/build/mlmpfr.4.2.0)
[mlmpfr: ./mlmpfr_compatibility_test]
+ /home/opam/.opam/default/.opam-switch/build/mlmpfr.4.2.0/./mlmpfr_compatibility_test  (CWD=/home/opam/.opam/default/.opam-switch/build/mlmpfr.4.2.0)
[mlmpfr: dune build]
+ /home/opam/.opam/default/bin/dune "build" "-p" "mlmpfr" "-j" "39" (CWD=/home/opam/.opam/default/.opam-switch/build/mlmpfr.4.2.0)
- File "src/dune", line 6, characters 36-48:
- 6 |  (foreign_stubs (language c) (names mlmpfr_stubs) (flags (:include c_flags.sexp)))
-                                         ^^^^^^^^^^^^
- (cd _build/default/src && /usr/bin/gcc -O2 -Wall -Wextra -fPIC -g -I /home/opam/.opam/default/lib/ocaml -o mlmpfr_stubs.o -c mlmpfr_stubs.c)
- In file included from /home/opam/.opam/default/lib/ocaml/caml/io.h:26,
-                  from mlmpfr_stubs.h:315,
-                  from mlmpfr_stubs.c:17:
- /home/opam/.opam/default/lib/ocaml/caml/platform.h: In function 'caml_plat_latch_is_released':
- /home/opam/.opam/default/lib/ocaml/caml/platform.h:393:10: error: implicit declaration of function 'atomic_load_acquire' [-Wimplicit-function-declaration]
-   393 |   return atomic_load_acquire(&latch->value) == Latch_released;
-       |          ^~~~~~~~~~~~~~~~~~~
- /home/opam/.opam/default/lib/ocaml/caml/platform.h: In function 'caml_plat_latch_set':
- /home/opam/.opam/default/lib/ocaml/caml/platform.h:401:3: error: implicit declaration of function 'atomic_store_release'; did you mean 'atomic_store_explicit'? [-Wimplicit-function-declaration]
-   401 |   atomic_store_release(&latch->value, Latch_unreleased);
-       |   ^~~~~~~~~~~~~~~~~~~~
-       |   atomic_store_explicit
[ERROR] The compilation of mlmpfr.4.2.0 failed at "dune build -p mlmpfr -j 39".
build failed... 

=== STDERR ===

2026-07-24 12:35.36: FAILED: build mlmpfr.4.2.0
2026-07-24 12:35.36: Job failed: build failed: mlmpfr.4.2.0