 | ./marionnet_from_scratch
* The log file is /tmp/marionnet_from_scratch.8ghLja3S/log
* Downloading marionnet ...                                     100%
* Downloading ocamlbricks ...                                   100%
* Downloading ocaml ...                                     100%
* Downloading lablgtk ...                                       100%
* Compiling ocaml ...                                       100%FAILED!
Last 20 lines of log (/tmp/marionnet_from_scratch.8ghLja3S/log):
======
gcc -I../byterun -DCAML_NAME_SPACE -DNATIVE_CODE -DTARGET_amd64 -DSYS_linux  -O -Wall -D_FILE_OFFSET_BITS=64 -D_REENTRANT   -c -o roots.o roots.c
ln -s ../byterun/globroots.c globroots.c
gcc -I../byterun -DCAML_NAME_SPACE -DNATIVE_CODE -DTARGET_amd64 -DSYS_linux  -O -Wall -D_FILE_OFFSET_BITS=64 -D_REENTRANT   -c -o globroots.o globroots.c
ln -s ../byterun/signals.c signals.c
gcc -I../byterun -DCAML_NAME_SPACE -DNATIVE_CODE -DTARGET_amd64 -DSYS_linux  -O -Wall -D_FILE_OFFSET_BITS=64 -D_REENTRANT   -c -o signals.o signals.c
signals.c: In function ‘caml_execute_signal’:
signals.c:137:33: warning: passing argument 3 to ‘restrict’-qualified parameter aliases with argument 2 [-Wrestrict]
  137 |   sigprocmask(SIG_BLOCK, &sigs, &sigs);
      |                          ~~~~~  ^~~~~
gcc -I../byterun -DCAML_NAME_SPACE -DNATIVE_CODE -DTARGET_amd64 -DSYS_linux  -O -Wall -D_FILE_OFFSET_BITS=64 -D_REENTRANT   -c -o signals_asm.o signals_asm.c
signals_asm.c:176:13: error: variably modified ‘sig_alt_stack’ at file scope
  176 | static char sig_alt_stack[SIGSTKSZ];
      |             ^~~~~~~~~~~~~
make[3]: *** [<builtin>: signals_asm.o] Error 1
make[3]: Leaving directory '/tmp/marionnet_from_scratch.8ghLja3S/ocaml-3.12.1/asmrun'
make[2]: *** [Makefile:579: makeruntimeopt] Error 2
make[2]: Leaving directory '/tmp/marionnet_from_scratch.8ghLja3S/ocaml-3.12.1'
make[1]: *** [Makefile:253: opt-core] Error 2
make[1]: Leaving directory '/tmp/marionnet_from_scratch.8ghLja3S/ocaml-3.12.1'
make: *** [Makefile:143: world.opt] Error 2
======
Exiting.
Exiting because of an unexpected error in line 1101