2026-09-19 20:12.00: New job: build mlmpfr.4.2.1 (0047e0811a31)
2026-09-19 20:12.00: Waiting for resource in pool day11-builds
2026-09-19 21:26.36: Got resource from pool day11-builds
2026-09-19 21:26.36: [profile full] build mlmpfr.4.2.1
2026-09-19 21:26.36: build mlmpfr.4.2.1 (0047e0811a31)
=== DEPENDENCIES (12 transitive) ===
  base-threads.base                                  ddcab511c589
  base-unix.base                                     742554e1dbc2
  compiler-cloning.enabled                           9ab6e8146b48
  conf-gmp.5                                         00570d20295f
  conf-mpfr.3                                        689b83af757e
  conf-pkg-config.5                                  5bc8297bba82
  csexp.1.5.2                                        6dfd0b7165bf
  dune.3.24.2                                        fc1180f13f25
  dune-configurator.3.24.2                           85add40e4d98
  ocaml.5.5.1                                        62cb7e73ffb1
  ocaml-base-compiler.5.5.1                          3187d6d6f452
  ocaml-compiler.5.5.1                               3af2e5d33cd9
=== STDOUT ===
Processing: [default: loading data]
[mlmpfr.4.2.1: dl]
[mlmpfr.4.2.1: extract]
[mlmpfr.4.2.1/mlmpfr_compatibility_test.c: dl]
-> retrieved mlmpfr.4.2.1  (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.4.2.1)
[mlmpfr: ./mlmpfr_compatibility_test]
+ /home/opam/.opam/default/.opam-switch/build/mlmpfr.4.2.1/./mlmpfr_compatibility_test  (CWD=/home/opam/.opam/default/.opam-switch/build/mlmpfr.4.2.1)
[mlmpfr: dune build]
+ /home/opam/.opam/default/bin/dune "build" "-p" "mlmpfr" "-j" "39" (CWD=/home/opam/.opam/default/.opam-switch/build/mlmpfr.4.2.1)
[ERROR] The compilation of mlmpfr.4.2.1 failed at "dune build -p mlmpfr -j 39".
- File "src/dune", line 8, characters 9-21:
- 8 |   (names mlmpfr_stubs)
-              ^^^^^^^^^^^^
- (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:323,
-                  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
build failed... 

=== STDERR ===

2026-09-19 21:27.36: FAILED: build mlmpfr.4.2.1
2026-09-19 21:27.36: Job failed: build failed: mlmpfr.4.2.1