Added better version information

Added better version information

The current version is now held in src/version.cc in a number of defines which needs to be modified when changing version.

The following defines make up the version information:

  MAJOR_VERSION
  MINOR_VERSION
  BUILD_NUMBER
  PATCH_LEVEL
  CANDIDATE_VERSION

The first four are numbers and the fifth is a boolean. Besides these five the define

  SONAME

can be used to set a specific soname when building the a shared library (see below). This will most likely be used on stable branches where binary compatibility is ensured between different versions. This define is a string.

This version information is now read by the SCons build to support setting the soname for a Linux shared library. This requires passing the option soname=on to the SCons build.

When soname=on is specified the soname for the shared library can be set in two different ways. Either it will be the full versioned library name (e.g. libv8-1.2.2.so) or a specific soname defined in src/version.cc. Whenever a shared library is build with an soname the filename of the library will hold the full version name (e.g. libv8-1.2.2.so).

I did not update the xcode project with the new files.

BUG=151
Committed: http://code.google.com/p/v8/source/detail?r=1826

[Mads Ager (chromium), 2009-04-29 06:02:54]

LGTM for the code part.

I don't know enough about the expectations for the soname version to know if
this approach will suit our needs.

http://codereview.chromium.org/100104/diff/1013/1025
File SConstruct (right):

http://codereview.chromium.org/100104/diff/1013/1025#newcode231
Line 231: },
accidental edit?

http://codereview.chromium.org/100104/diff/1013/1025#newcode610
Line 610: Abort("Shared Object soname not applicable for Linux.")
Linux -> Windows

[Søren Thygesen Gjesse, 2009-04-29 19:52:46]

http://codereview.chromium.org/100104/diff/1013/1025
File SConstruct (right):

http://codereview.chromium.org/100104/diff/1013/1025#newcode231
Line 231: },
On 2009/04/29 06:02:54, Mads Ager wrote:
> accidental edit?

Done.

http://codereview.chromium.org/100104/diff/1013/1025#newcode610
Line 610: Abort("Shared Object soname not applicable for Linux.")
On 2009/04/29 06:02:54, Mads Ager wrote:
> Linux -> Windows

Done.

[Søren Thygesen Gjesse, 2009-04-29 20:01:46]

Changes the naming scheme slightly to match my suggestion written as comment #4
on issue 151 (http://code.google.com/p/v8/issues/detail?id=151)

[Mads Ager (chromium), 2009-04-30 06:36:57]

LGTM

[Christian Plesner Hansen, 2009-04-30 07:36:14]

Lgtm!

[Søren Thygesen Gjesse, 2009-04-30 08:38:03]

One (final?) update where I have added the option of setting a specific soname.
Please look at updated description.

I am planning to merge this change to branches/1.1 and set a specific soname of
e.g. libv8.so.1 to help Linux pagkage managers thae advantage of this.

[Mads Ager (chromium), 2009-04-30 08:56:31]

Still LGTM.