Re: versioning, backward compatability

[Andreas Metzler]

<address@hidden> wrote:
> I translated my library using libtool with the -version-info=5:0:0
> parameter and I installed it into /usr/local//lib using libtool.
> Then I translated executable "prog" which was linked with this
> library. Readelf -d prog shows 

> 0x00000001 (NEEDED) Shared library: [libmylibrary.so.5]

> Then I translated same library again with parameter -version-info
> 6:0:6. With this, I wanted to say that this new interface number 6
> is backward compatible with all older interfaces and that all
> programs that was ever linked againts any former version of my
> library should now link this new version of library.
[...]

Following libtool's generic versioning recipe ...

| 3 If the library source code has changed at all since the last update,
| then increment revision (`c:r:a' becomes `c:r+1:a').
| 4 If any interfaces have been added, removed, or changed since the
| last update, increment current, and set revision to 0.
| 5 If any interfaces have been added since the last public release,
| then increment age.
| 6 If any interfaces have been removed since the last public release,
| then set age to 0.

... you should have ended up with 5:1:0 or 6:0:1.

cu andreas

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