Re: [Caml-list] Incremental linking
Dawid Toton wrote: I have lot of modules and they are compiled to native code. So I have .cmx and .o files and want to link them faster. Is is possible to make linking an associative operation acting on modules? [...] Documentation of ld says that files produced with --relocatable can be used as intermediate partially linked files. Can something like this be done with object code produced by ocamlopt? Yes. ocamlopt -pack actually calls ld -r underneath to consolidate several compilation units in a single .cmx/.o file. ld -r will resolve references between these compilation units. Gerd Stolpmann wrote: Well, you can link several .cmx files (and their accompanying .o files) to a .cmxa file (and an accompanying .a file): ocamlopt -a From a linking standpoint, ocamlopt -a is equivalent to ar: it does not resolve any references, just concatenates individual .cmx/.o files in a single .cmxa/.a file. That can still speed up linking a bit, since reading one big .a file is faster than reading a zillion small .o files. Generally speaking, I'm somewhat surprised that linking time is an issue for Dawid. Modern Unix linkers are quite fast, and the additional link-time work that OCaml does is small. Let us know if you manage to narrow the problem. - 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] Incremental linking
I have lot of modules and they are compiled to native code. So I have .cmx and .o files and want to link them faster. Is is possible to make linking an associative operation acting on modules? I would like to do something like the following: Knowing the correct partial order of modules (that compiler requires) I can create a tree that preserves that order. Leafs are modules. Other nodes of the tree correspond to a result of linking all descendant modules. Modules that are frequently recompiled are placed closer to the root. This way I expect to execute less linking operations during development. Documentation of ld says that files produced with --relocatable can be used as intermediate partially linked files. Can something like this be done with object code produced by ocamlopt? I don't know ocaml-specific details of linking, so maybe I overlook some obvoius obstacle? Dawid ___ 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] Incremental linking
I have lot of modules and they are compiled to native code. So I have .cmx and .o files and want to link them faster. Is is possible to make linking an associative operation acting on modules? I would like to do something like the following: Knowing the correct partial order of modules (that compiler requires) I can create a tree that preserves that order. Leafs are modules. Other nodes of the tree correspond to a result of linking all descendant modules. Modules that are frequently recompiled are placed closer to the root. This way I expect to execute less linking operations during development. Documentation of ld says that files produced with --relocatable can be used as intermediate partially linked files. Can something like this be done with object code produced by ocamlopt? I don't know ocaml-specific details of linking, so maybe I overlook some obvoius obstacle? Dawid ___ 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
Re: [Caml-list] Incremental linking
Am Dienstag, den 29.09.2009, 20:39 +0200 schrieb Dawid Toton: I have lot of modules and they are compiled to native code. So I have .cmx and .o files and want to link them faster. Well, you can link several .cmx files (and their accompanying .o files) to a .cmxa file (and an accompanying .a file): ocamlopt -a You cannot do the same again on the next level, i.e. link several .cmxa/.a together to get another .cmxa/.a. (I don't remember why this restriction exists.) Gerd Is is possible to make linking an associative operation acting on modules? I would like to do something like the following: Knowing the correct partial order of modules (that compiler requires) I can create a tree that preserves that order. Leafs are modules. Other nodes of the tree correspond to a result of linking all descendant modules. Modules that are frequently recompiled are placed closer to the root. This way I expect to execute less linking operations during development. Documentation of ld says that files produced with --relocatable can be used as intermediate partially linked files. Can something like this be done with object code produced by ocamlopt? I don't know ocaml-specific details of linking, so maybe I overlook some obvoius obstacle? Dawid ___ 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 -- Gerd Stolpmann, Bad Nauheimer Str.3, 64289 Darmstadt,Germany g...@gerd-stolpmann.de http://www.gerd-stolpmann.de Phone: +49-6151-153855 Fax: +49-6151-997714 ___ 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
