Re: [Caml-list] Shared libraries with ocamlopt callable from C (without main())?
= $ cat ./main.c =
#include stdio.h
#include libadd5wrapper.h
int main (int argc,char **argv){
printf(Gimme - %d \n, add5wrapper());
Should be add5wrapper(argv) -- as gcc's warnings told you.
return 0;
}
Now I try to BUILD the whole thing:
[...]
Number 4 is where it breaks. I get a ton of errors and this is where
it ends for me. Because # 4 is also the point where I definitely have
no idea what I'm doing.
Two things:
- You're not linking in add5-prog.o as far as I can see
- In static mode, the Unix linker is very picky about the relative
order of -lxxx arguments on the command-line. For more information,
see the Info pages for GNU ld. You probably don't need -static anyway.
The following works:
ocamlopt -output-obj add5.ml -o add5-prog.o
gcc -I`ocamlc -where` -c add5wrapperlib.c
gcc -c main.c
gcc -o mainprog.opt main.o add5wrapperlib.o add5-prog.o \
-L`ocamlc -where` -lasmrun -ldl -lm
Add -static to the last line if you know you really need it.
Hope this puts you back on tracks.
- Xavier Leroy
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Re: [Caml-list] Why does value restriction not apply to the empty list ?
Antoine Delignat-Lavaud wrote: I chose to solve the problem of polymorphic references by adding value restriction* to my inferer, using ocaml to check my results. Not knowing whether the empty list should be considered a value or an expression, I copied Ocaml's behavior and made it a value. Yes, the empty list is a value, like all other constants. As a result, my inferer gave the following expression the integer type : let el = [] in if hd el then 1 else hd el ;; which is the expected result since el has polymorphic type 'a list but does not look right because it is used as both a bool list and an int list. It is perfectly right. The empty list can of course be used both as a bool list and an int list; that's exactly what parametric polymorphism is all about. Richard Jones wrote: But the same if statement within a function definition causes an error: # let f el = if List.length el 0 then (List.hd el)+(int_of_string (List.hd el)) else 0;; ^^ This expression has type int but is here used with type string This is Hindley-Milner polymorphism at work: only let-bound variables can have polymorphic types, while function parameters are monomorphic. - Xavier Leroy ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] memory usage
Hello, I have developed an application and have issue with memory usage. Application was designed for work as server, 24x7. After several hours of work, RSS memory grows up to 40-50MB. Each thread must not use more than 100-200KB of memory (maximum 20 threads are run at the same time). GC debug information: Growing heap to 3840k bytes Growing heap to 4320k bytes Shrinking heap to 3840k bytes Growing heap to 4320k bytes Growing heap to 4800k bytes Growing heap to 5280k bytes Shrinking heap to 4800k bytes Shrinking heap to 4320k bytes Shrinking heap to 3840k bytes Growing heap to 4320k bytes Growing heap to 4800k bytes Growing heap to 5280k bytes Shrinking heap to 4800k bytes Shrinking heap to 4320k bytes Shrinking heap to 3840k bytes Shrinking heap to 3360k bytes Growing heap to 3840k bytes Growing heap to 4320k bytes Growing heap to 4800k bytes Growing heap to 960k bytes Shrinking heap to 4320k bytes Shrinking heap to 3840k bytes Shrinking heap to 3360k bytes Shrinking heap to 2880k bytes Growing heap to 3360k bytes Shrinking heap to 2880k bytes Shrinking heap to 2400k bytes Growing heap to 2880k bytes Growing heap to 3360k bytes Growing heap to 3840k bytes Shrinking heap to 3360k bytes Shrinking heap to 2880k bytes Growing heap to 3360k bytes Shrinking heap to 2880k bytes As you can see, heap size never gets bigger 5-6MB. I made core dump of process. 90% of memory was filled with values which are created inside threads and never been copied outside of them. Each thread is killed after work is done, I am absolutely sure in it; all unused file descriptors are closed. Playing with Gc.set has not brought notable results. Please, give me some start point to find the roots of the problem. Sorry for my English. ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
