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|ID||Project||Category||View Status||Date Submitted||Last Update|
|0005094||OCaml||OCaml general||public||2010-07-06 18:00||2011-05-17 16:51|
|Priority||normal||Severity||block||Reproducibility||have not tried|
|Target Version||Fixed in Version|
|Summary||0005094: Unable to debug under Cygwin (with flexdll)|
I have recently upgraded to 3.11.2 and would like to debug but it seems that it is impossible for Cygwin+flexdll setup (or at least I don't know how).
- cygwin 1.7
- ocaml 3.11.2 (compiled with no Tk - otherwise the build was failing)
- flexdll 0.23 installed at C:\Program Files\flexdll
$ cat test.ml
print_endline "Hello world!"
$ ocamlc -g -o a test.ml
$ ocamldebug ./a
Objective Caml Debugger version 3.11.2
Loading program... Cannot find FLEXDLL_RELOCATE
Cannot find FLEXDLL_RELOCATE
12 [main] ocamlrun 5132 C:\cygwin\usr\local\bin\ocamlrun.exe: *** fatal error - unable to remap \\?\C:\cygwin\usr\local\lib\ocaml\stublibs\dllunix.so to same address as parent: 0x665C0000 != 0x0
11 [main] ocamldebug 1752 fork: child 5132 - died waiting for dll loading, errno 11
Unix error : 'fork' failed : Resource temporarily unavailable
|Tags||No tags attached.|
|Yasutaka Atarashi found the cause for bad interaction between flexdll and Cygwin's fork (namely, flexdll used putenv instead of setenv). This is fixed in the current development version of flexdll and it might solve the issue reported here. Any feedback on that would be appreciated.|
|I have just upgraded to 0.25 flexdll and builded new 3.12.0. Unfortunately the result is the same.|
One additional note/question about flexdll (under Cygwin). Is the -custom flag not supposed to work when ocaml has been compiled with support for flexdll?
Any compilation with -custom that I've tried fails - for example this is what I get when compiling findlib with new toolchain
ocamlc -custom -o ocamlfind.exe findlib.cma unix.cma \
realgcc.exe: /tmp/camlprime47ca9.c: No such file or directory
realgcc.exe: no input files
** Fatal error: Error while compiling
File "_none_", line 1, characters 0-1:
Error: Error while building custom runtime system
make: *** [ocamlfind] Error 2
At that time "the current development version" mentioned by frisch didn't mean the release version 0.25 but subversion repository. However, now my patch is included in the release version 0.26 according to ChangeLog. So, please try again.
In my environment (patched flexdll and OCaml 3.12.0 on Cygwin 1.7.7), compiling findlib, including quoted command line, does not cause the error.
What is "realgcc.exe"? Do you have custom configuration for gcc?
Flexdll version 0.26 fixes this problem.
|2010-07-06 18:00||aostruszka||New Issue|
|2010-09-07 19:28||frisch||Note Added: 0005653|
|2010-10-28 00:52||aostruszka||Note Added: 0005695|
|2010-10-28 01:46||aostruszka||Note Added: 0005696|
|2010-12-20 16:02||atarashi||Note Added: 0005744|
|2011-05-17 16:51||doligez||Note Added: 0005903|
|2011-05-17 16:51||doligez||Status||new => closed|
|2011-05-17 16:51||doligez||Resolution||open => fixed|
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