0005282: .cmo files are generated even for native compilation - MantisBT

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ID

Project

Category

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Date Submitted

Last Update

0005282

OCaml

OCamlbuild (the tool)

public

2011-06-04 14:28

2012-09-20 16:22

Reporter

Camarade_Tux

Assigned To

xclerc

Priority

normal

Severity

minor

Reproducibility

always

Status

assigned

Resolution

no change required

Platform

OS

OS Version

Product Version

3.12.0

Target Version

4.01.0+dev

Fixed in Version

Summary

0005282: .cmo files are generated even for native compilation

Description

When compiling native targets, ocamlbuild also compiles .cmo files.

Example on an empty folder:

  % touch a.ml
  % ocamlbuild -classic-display a.native
  /opt/ocaml/bin/ocamldep.opt -modules a.ml > a.ml.depends
  /opt/ocaml/bin/ocamlc.opt -c -o a.cmo a.ml # calls ocamlc.opt
  /opt/ocaml/bin/ocamlopt.opt -c -o a.cmx a.ml
  /opt/ocaml/bin/ocamlopt.opt a.cmx -o a.native

With many more complex files, this can lead to a substantial slow-down.

Tags

No tags attached.

Relationships

duplicate of

assigned

Tries to build cmo files for native target(s)

Notes
(0005982) ertai (developer) 2011-06-05 15:12	We acknowledge this is a limitation. However this is not a bug, it is a design choice with a simple and recommendable workaround. Indeed you observe this behavior only because you have no .mli for this file. There is technical reasons to not accept .cmi to be generated by both ocamlc and ocamlopt. So we impose them to be always generated by ocamlc. If you have a .mli then you see no drawbacks of this method. In short we recommend you the good practice of having .mli files.

(0007384) goswin (reporter) 2012-04-22 01:34	"There is technical reasons to not accept .cmi to be generated by both ocamlc and ocamlopt." So for the sake of documenting this what are those reasons?

Issue History
Date Modified	Username	Field	Change
2011-06-04 14:28	Camarade_Tux	New Issue
2011-06-05 15:12	ertai	Note Added: 0005982
2011-06-05 15:12	ertai	Status	new => acknowledged
2011-06-05 15:12	ertai	Resolution	open => no change required
2011-06-06 09:08	xclerc	Relationship added	duplicate of 0004613
2011-06-06 09:09	xclerc	Status	acknowledged => assigned
2011-06-06 09:09	xclerc	Assigned To	=> xclerc
2012-02-02 15:17	protz	Category	OCamlbuild => OCamlbuild (the tool)
2012-04-22 01:34	goswin	Note Added: 0007384
2012-07-06 16:22	doligez	Target Version	=> 4.01.0+dev
2012-07-06 16:23	doligez	Severity	major => minor
2012-07-31 13:36	doligez	Target Version	4.01.0+dev => 4.00.1+dev
2012-09-20 16:22	doligez	Target Version	4.00.1+dev => 4.01.0+dev

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