flexdll error: cannot relocate RELOC_REL32

[Cao Qinxiang]

Dear Cygwin development team and Cygwin experts,

I use Cygwin-64 on windows and get a fork problem when I try to manually
install menhir package.

----------------
     0 [main] ocamlrun 1615 child_info_fork::abort: address space needed by
'dllunix.so' (0x400000) is already occupied
/usr/bin/ocamldep.opt -modules menhir.ml > menhir.ml.depends
      0 [main] ocamlrun 1616 child_info_fork::abort: address space needed
by 'dllunix.so' (0x400000) is already occupied
/cygdrive/g/Cygwin/menhir-20190924/src/_stage1/myocamlbuild: "fork" failed:
Resource temporarily unavailable
----------------

I follow online suggestion to run "/usr/bin/rebaseall -v" using ash.exe.
However, I get another program after that:


----------------
Fatal error: cannot load shared library dllunix
Reason: flexdll error: cannot relocate RELOC_REL32, target is too far:
0xfffffffc02088b5f  0x2088b5f
----------------

I searched solutions for this new problem. Most solutions are to manually
rebase dllunix to a lower number like 0x06440000. However, I cannot
do that. Here is what I get in Cygwin:

----------------
$ rebase -b 0x06440000 /usr/lib/ocaml/stublibs/dllunix.so
rebase: Invalid Baseaddress 0x06440000, must be > 0x200000000
----------------

So, what should I do to this problem?

Also, if I did not use "/usr/bin/rebaseall -v" using ash.exe, but follow
FAQ's suggestion (run "rebase-trigger fullrebase" in Cygwin), then I cannot
solve the fork problem and still get
----------------
     0 [main] ocamlrun 1615 child_info_fork::abort: address space needed by
'dllunix.so' (0x400000) is already occupied
/usr/bin/ocamldep.opt -modules menhir.ml > menhir.ml.depends
      0 [main] ocamlrun 1616 child_info_fork::abort: address space needed
by 'dllunix.so' (0x400000) is already occupied
/cygdrive/g/Cygwin/menhir-20190924/src/_stage1/myocamlbuild: "fork" failed:
Resource temporarily unavailable
----------------

Thank you very much!

Qinxiang Cao
Shanghai Jiao Tong University, John Hopcroft Center
Room 1110-2, SJTUSE Building
800 Dongchuan Road, Shanghai, China, 200240

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