Bug 94043

Summary:	ODE's lack of "double-precision" use-flag may cause serious malfunctions in depending libraries.
Product:	Gentoo Linux	Reporter:	Maarten Billemont <lhunath>
Component:	New packages	Assignee:	Gentoo Games <games>
Status:	RESOLVED FIXED
Severity:	normal
Priority:	High
Version:	unspecified
Hardware:	x86
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Maarten Billemont 2005-05-26 00:38:01 UTC

Libraries depending on dev-games/ode can either be compiled using SINGLE or DOUBLE precision (float/double). The default is most often SINGLE, since this gives a performance boost, especially on slower, more ancient machines (and games need to be universal). Sadly, ODE is set to compile with DOUBLE precision by default, which causes incompatibilities of the kind that all depending libraries 'freak out' and fail to perform anything expected. A "double-precision" use flag should be added (just like on the dev-games/ogre ebuild). Or, setting the default back to SINGLE (preferably, the first, of course).

Comment 1 SpanKY gentoo-dev

2005-07-18 17:13:45 UTC

and how exactly does one configure it to use double versus single ?

Comment 2 Maarten Billemont 2005-07-18 17:48:11 UTC

Lyndir ode-0.5 # less INSTALL 
      1 
      2 here are the steps to buid ODE:
      3 
[...]
     12 (2) edit the settings in the file config/user-settings. the list of 
supported
     13     platforms is given in that file.

Lyndir ode-0.5 # cat config/user-settings
# ODE user settings: the following variables must be set by the user
[...]
# (2) the floating point precision to use (either "SINGLE" or "DOUBLE")

PRECISION=SINGLE
#PRECISION=DOUBLE

Wasn't too hard :P

Comment 3 SpanKY gentoo-dev

2005-07-18 21:47:55 UTC

in cvs