* [Caml-list] Is there some builtin function that flushes buffers on shutdown?
@ 2017-02-03 8:56 Christoph Höger
2017-02-03 9:16 ` Nicolás Ojeda Bär
0 siblings, 1 reply; 6+ messages in thread
From: Christoph Höger @ 2017-02-03 8:56 UTC (permalink / raw)
To: caml-list
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Dear all,
I managed to manually link and run an object file generated by ocamlopt. A
small part seems to be missing, however:
➜ llvmlink ocamlfind opt -package ANSITerminal -linkpkg -verbose
-output-obj -o test.object.o test.ml
➜ llvmlink clang -I$(ocamlc -where) -lm wrapper.c test.object.o -o wrapper
~/.opam/4.04.0/lib/ocaml/libunix.a -ldl
~/.opam/4.04.0/lib/ocaml/libasmrun.a
/home/choeger/.opam/4.04.0/lib/ANSITerminal/libANSITerminal_stubs.a
These commands produce an executable output, but the screen remains empty.
This changes, when I manually flush the stdout buffer in the code (I obtain
the desired results then).
Find attached the test sources. When I uncomment the Printf.printf in
test.ml, everything seems to work fine. But when I compile the test using
ocamlopt solely, this is not necessary. It seems some buffers do not get
flushed here. Does anyone know, why?
regards,
Christoph
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[-- Attachment #2: wrapper.c --]
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#include <caml/callback.h>
#include <stdio.h>
int main(int argc, char ** argv)
{
int result;
/* Initialize OCaml code */
caml_startup(argv);
printf("finished\n");
return 0;
}
[-- Attachment #3: test.ml --]
[-- Type: application/octet-stream, Size: 1165 bytes --]
module T = ANSITerminal
open Printf
let colors =
[T.Black; T.Red; T.Green; T.Yellow; T.Blue; T.Magenta; T.Cyan;
T.White; T.Default]
let color_to_string = function
| T.Black -> "black"
| T.Red -> "red"
| T.Green -> "green"
| T.Yellow -> "yellow"
| T.Blue -> "blue"
| T.Magenta -> "magent"
| T.Cyan -> "cyan"
| T.White -> "white"
| T.Default -> "def"
let () =
(* Table *)
let print_line fore =
printf "%6s " (color_to_string fore);
List.iter (fun back ->
T.print_string [T.Foreground fore; T.Background back; ]
" !Text! ";
) colors;
print_string "\n" in
Printf.eprintf "starting\n" ;
T.erase T.Screen;
T.set_cursor 1 1;
print_string " ";
List.iter (fun back -> printf "%6s " (color_to_string back)) colors;
print_string "\n";
List.iter print_line colors;
(* Effects *)
T.print_string [T.Bold] "Bold ";
T.print_string [T.Underlined] "Underlined ";
T.print_string [T.Blink] "Blink ";
T.print_string [T.Inverse] "Inverse ";
T.print_string [T.Hidden] "Hidden";
(* uncomment to see results Printf.printf "%!"; *)
print_string "<-- hidden\n" ;
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [Caml-list] Is there some builtin function that flushes buffers on shutdown?
2017-02-03 8:56 [Caml-list] Is there some builtin function that flushes buffers on shutdown? Christoph Höger
@ 2017-02-03 9:16 ` Nicolás Ojeda Bär
2017-02-03 10:15 ` Christoph Höger
0 siblings, 1 reply; 6+ messages in thread
From: Nicolás Ojeda Bär @ 2017-02-03 9:16 UTC (permalink / raw)
To: Christoph Höger; +Cc: OCaml Mailing List
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Hi Christoph,
I can't check now, but it sounds like you forgot to link $(ocamlc
-where)/std_exit.o into your executable.
Cheers!
Nicolas
On Fri, Feb 3, 2017 at 9:56 AM, Christoph Höger <
christoph.hoeger@celeraone.com> wrote:
> Dear all,
>
> I managed to manually link and run an object file generated by ocamlopt. A
> small part seems to be missing, however:
>
> ➜ llvmlink ocamlfind opt -package ANSITerminal -linkpkg -verbose
> -output-obj -o test.object.o test.ml
>
> ➜ llvmlink clang -I$(ocamlc -where) -lm wrapper.c test.object.o -o
> wrapper ~/.opam/4.04.0/lib/ocaml/libunix.a -ldl ~/.opam/4.04.0/lib/ocaml/libasmrun.a
> /home/choeger/.opam/4.04.0/lib/ANSITerminal/libANSITerminal_stubs.a
>
> These commands produce an executable output, but the screen remains empty.
> This changes, when I manually flush the stdout buffer in the code (I obtain
> the desired results then).
>
> Find attached the test sources. When I uncomment the Printf.printf in
> test.ml, everything seems to work fine. But when I compile the test using
> ocamlopt solely, this is not necessary. It seems some buffers do not get
> flushed here. Does anyone know, why?
>
> regards,
>
> Christoph
>
>
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [Caml-list] Is there some builtin function that flushes buffers on shutdown?
2017-02-03 9:16 ` Nicolás Ojeda Bär
@ 2017-02-03 10:15 ` Christoph Höger
2017-02-03 10:52 ` Nicolás Ojeda Bär
0 siblings, 1 reply; 6+ messages in thread
From: Christoph Höger @ 2017-02-03 10:15 UTC (permalink / raw)
To: Nicolás Ojeda Bär; +Cc: OCaml Mailing List
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That sounded totally reasonable, but is not the cause. When I think about
it, it cannot work that way, since the linker should have complained about
a missing symbol, right?
On Fri, Feb 3, 2017 at 10:16 AM, Nicolás Ojeda Bär <
nicolas.ojeda.bar@lexifi.com> wrote:
> Hi Christoph,
>
> I can't check now, but it sounds like you forgot to link $(ocamlc
> -where)/std_exit.o into your executable.
>
> Cheers!
> Nicolas
>
>
> On Fri, Feb 3, 2017 at 9:56 AM, Christoph Höger <
> christoph.hoeger@celeraone.com> wrote:
>
>> Dear all,
>>
>> I managed to manually link and run an object file generated by ocamlopt.
>> A small part seems to be missing, however:
>>
>> ➜ llvmlink ocamlfind opt -package ANSITerminal -linkpkg -verbose
>> -output-obj -o test.object.o test.ml
>>
>> ➜ llvmlink clang -I$(ocamlc -where) -lm wrapper.c test.object.o -o
>> wrapper ~/.opam/4.04.0/lib/ocaml/libunix.a -ldl
>> ~/.opam/4.04.0/lib/ocaml/libasmrun.a /home/choeger/.opam/4.04.0/lib
>> /ANSITerminal/libANSITerminal_stubs.a
>>
>> These commands produce an executable output, but the screen remains
>> empty. This changes, when I manually flush the stdout buffer in the code (I
>> obtain the desired results then).
>>
>> Find attached the test sources. When I uncomment the Printf.printf in
>> test.ml, everything seems to work fine. But when I compile the test
>> using ocamlopt solely, this is not necessary. It seems some buffers do not
>> get flushed here. Does anyone know, why?
>>
>> regards,
>>
>> Christoph
>>
>>
>
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [Caml-list] Is there some builtin function that flushes buffers on shutdown?
2017-02-03 10:15 ` Christoph Höger
@ 2017-02-03 10:52 ` Nicolás Ojeda Bär
2017-02-03 11:37 ` Nicolás Ojeda Bär
0 siblings, 1 reply; 6+ messages in thread
From: Nicolás Ojeda Bär @ 2017-02-03 10:52 UTC (permalink / raw)
To: Christoph Höger; +Cc: OCaml Mailing List
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Hi Christoph,
You are right, but that is because std_exit.cmx does not get linked by
default when using -output-obj, so
in fact you need to add it by hand:
ocamlfind opt -package ANSITerminal -linkpkg -verbose -output-obj -o
test.object.o test.ml std_exit.ml
Cheers!
Nicolas
On Fri, Feb 3, 2017 at 11:15 AM, Christoph Höger <
christoph.hoeger@celeraone.com> wrote:
> That sounded totally reasonable, but is not the cause. When I think about
> it, it cannot work that way, since the linker should have complained about
> a missing symbol, right?
>
> On Fri, Feb 3, 2017 at 10:16 AM, Nicolás Ojeda Bär <
> nicolas.ojeda.bar@lexifi.com> wrote:
>
>> Hi Christoph,
>>
>> I can't check now, but it sounds like you forgot to link $(ocamlc
>> -where)/std_exit.o into your executable.
>>
>> Cheers!
>> Nicolas
>>
>>
>> On Fri, Feb 3, 2017 at 9:56 AM, Christoph Höger <
>> christoph.hoeger@celeraone.com> wrote:
>>
>>> Dear all,
>>>
>>> I managed to manually link and run an object file generated by ocamlopt.
>>> A small part seems to be missing, however:
>>>
>>> ➜ llvmlink ocamlfind opt -package ANSITerminal -linkpkg -verbose
>>> -output-obj -o test.object.o test.ml
>>>
>>> ➜ llvmlink clang -I$(ocamlc -where) -lm wrapper.c test.object.o -o
>>> wrapper ~/.opam/4.04.0/lib/ocaml/libunix.a -ldl
>>> ~/.opam/4.04.0/lib/ocaml/libasmrun.a /home/choeger/.opam/4.04.0/lib
>>> /ANSITerminal/libANSITerminal_stubs.a
>>>
>>> These commands produce an executable output, but the screen remains
>>> empty. This changes, when I manually flush the stdout buffer in the code (I
>>> obtain the desired results then).
>>>
>>> Find attached the test sources. When I uncomment the Printf.printf in
>>> test.ml, everything seems to work fine. But when I compile the test
>>> using ocamlopt solely, this is not necessary. It seems some buffers do not
>>> get flushed here. Does anyone know, why?
>>>
>>> regards,
>>>
>>> Christoph
>>>
>>>
>>
>
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [Caml-list] Is there some builtin function that flushes buffers on shutdown?
2017-02-03 10:52 ` Nicolás Ojeda Bär
@ 2017-02-03 11:37 ` Nicolás Ojeda Bär
2017-02-09 12:53 ` Christoph Höger
0 siblings, 1 reply; 6+ messages in thread
From: Nicolás Ojeda Bär @ 2017-02-03 11:37 UTC (permalink / raw)
To: Christoph Höger; +Cc: OCaml Mailing List
[-- Attachment #1: Type: text/plain, Size: 2272 bytes --]
That should be std_exit.cmx, not std_exit.ml.
Sorry about the typo.
Cheers,
Nicolas
On Fri, Feb 3, 2017 at 11:52 AM, Nicolás Ojeda Bär <
nicolas.ojeda.bar@lexifi.com> wrote:
> Hi Christoph,
>
> You are right, but that is because std_exit.cmx does not get linked by
> default when using -output-obj, so
> in fact you need to add it by hand:
>
> ocamlfind opt -package ANSITerminal -linkpkg -verbose -output-obj -o
> test.object.o test.ml std_exit.ml
>
> Cheers!
> Nicolas
>
>
>
> On Fri, Feb 3, 2017 at 11:15 AM, Christoph Höger <
> christoph.hoeger@celeraone.com> wrote:
>
>> That sounded totally reasonable, but is not the cause. When I think about
>> it, it cannot work that way, since the linker should have complained about
>> a missing symbol, right?
>>
>> On Fri, Feb 3, 2017 at 10:16 AM, Nicolás Ojeda Bär <
>> nicolas.ojeda.bar@lexifi.com> wrote:
>>
>>> Hi Christoph,
>>>
>>> I can't check now, but it sounds like you forgot to link $(ocamlc
>>> -where)/std_exit.o into your executable.
>>>
>>> Cheers!
>>> Nicolas
>>>
>>>
>>> On Fri, Feb 3, 2017 at 9:56 AM, Christoph Höger <
>>> christoph.hoeger@celeraone.com> wrote:
>>>
>>>> Dear all,
>>>>
>>>> I managed to manually link and run an object file generated by
>>>> ocamlopt. A small part seems to be missing, however:
>>>>
>>>> ➜ llvmlink ocamlfind opt -package ANSITerminal -linkpkg -verbose
>>>> -output-obj -o test.object.o test.ml
>>>>
>>>> ➜ llvmlink clang -I$(ocamlc -where) -lm wrapper.c test.object.o -o
>>>> wrapper ~/.opam/4.04.0/lib/ocaml/libunix.a -ldl
>>>> ~/.opam/4.04.0/lib/ocaml/libasmrun.a /home/choeger/.opam/4.04.0/lib
>>>> /ANSITerminal/libANSITerminal_stubs.a
>>>>
>>>> These commands produce an executable output, but the screen remains
>>>> empty. This changes, when I manually flush the stdout buffer in the code (I
>>>> obtain the desired results then).
>>>>
>>>> Find attached the test sources. When I uncomment the Printf.printf in
>>>> test.ml, everything seems to work fine. But when I compile the test
>>>> using ocamlopt solely, this is not necessary. It seems some buffers do not
>>>> get flushed here. Does anyone know, why?
>>>>
>>>> regards,
>>>>
>>>> Christoph
>>>>
>>>>
>>>
>>
>
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [Caml-list] Is there some builtin function that flushes buffers on shutdown?
2017-02-03 11:37 ` Nicolás Ojeda Bär
@ 2017-02-09 12:53 ` Christoph Höger
0 siblings, 0 replies; 6+ messages in thread
From: Christoph Höger @ 2017-02-09 12:53 UTC (permalink / raw)
To: Nicolás Ojeda Bär; +Cc: OCaml Mailing List
[-- Attachment #1: Type: text/plain, Size: 2617 bytes --]
Thanks, that worked like a charm.
As a side note: The order of arguments is important. test.ml std_exit.cmx
will work, while std_exit.cmx test.ml will not.
On Fri, Feb 3, 2017 at 12:37 PM, Nicolás Ojeda Bär <
nicolas.ojeda.bar@lexifi.com> wrote:
> That should be std_exit.cmx, not std_exit.ml.
>
> Sorry about the typo.
>
> Cheers,
> Nicolas
>
>
> On Fri, Feb 3, 2017 at 11:52 AM, Nicolás Ojeda Bär <
> nicolas.ojeda.bar@lexifi.com> wrote:
>
>> Hi Christoph,
>>
>> You are right, but that is because std_exit.cmx does not get linked by
>> default when using -output-obj, so
>> in fact you need to add it by hand:
>>
>> ocamlfind opt -package ANSITerminal -linkpkg -verbose -output-obj -o
>> test.object.o test.ml std_exit.ml
>>
>> Cheers!
>> Nicolas
>>
>>
>>
>> On Fri, Feb 3, 2017 at 11:15 AM, Christoph Höger <
>> christoph.hoeger@celeraone.com> wrote:
>>
>>> That sounded totally reasonable, but is not the cause. When I think
>>> about it, it cannot work that way, since the linker should have complained
>>> about a missing symbol, right?
>>>
>>> On Fri, Feb 3, 2017 at 10:16 AM, Nicolás Ojeda Bär <
>>> nicolas.ojeda.bar@lexifi.com> wrote:
>>>
>>>> Hi Christoph,
>>>>
>>>> I can't check now, but it sounds like you forgot to link $(ocamlc
>>>> -where)/std_exit.o into your executable.
>>>>
>>>> Cheers!
>>>> Nicolas
>>>>
>>>>
>>>> On Fri, Feb 3, 2017 at 9:56 AM, Christoph Höger <
>>>> christoph.hoeger@celeraone.com> wrote:
>>>>
>>>>> Dear all,
>>>>>
>>>>> I managed to manually link and run an object file generated by
>>>>> ocamlopt. A small part seems to be missing, however:
>>>>>
>>>>> ➜ llvmlink ocamlfind opt -package ANSITerminal -linkpkg -verbose
>>>>> -output-obj -o test.object.o test.ml
>>>>>
>>>>> ➜ llvmlink clang -I$(ocamlc -where) -lm wrapper.c test.object.o -o
>>>>> wrapper ~/.opam/4.04.0/lib/ocaml/libunix.a -ldl
>>>>> ~/.opam/4.04.0/lib/ocaml/libasmrun.a /home/choeger/.opam/4.04.0/lib
>>>>> /ANSITerminal/libANSITerminal_stubs.a
>>>>>
>>>>> These commands produce an executable output, but the screen remains
>>>>> empty. This changes, when I manually flush the stdout buffer in the code (I
>>>>> obtain the desired results then).
>>>>>
>>>>> Find attached the test sources. When I uncomment the Printf.printf in
>>>>> test.ml, everything seems to work fine. But when I compile the test
>>>>> using ocamlopt solely, this is not necessary. It seems some buffers do not
>>>>> get flushed here. Does anyone know, why?
>>>>>
>>>>> regards,
>>>>>
>>>>> Christoph
>>>>>
>>>>>
>>>>
>>>
>>
>
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2017-02-03 8:56 [Caml-list] Is there some builtin function that flushes buffers on shutdown? Christoph Höger
2017-02-03 9:16 ` Nicolás Ojeda Bär
2017-02-03 10:15 ` Christoph Höger
2017-02-03 10:52 ` Nicolás Ojeda Bär
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2017-02-09 12:53 ` Christoph Höger
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