Add SOVERSION support to CMake configuration

[mloskot]

This task is about implementing complete support for SOVERSION on Unix platforms in CMake configuration.

This task is also related to #385

[mloskot]

r3683 - Set SOVERSION property on C API shared library using CAPI_INTERFACE_* values

[strk]

any chance to see this backported to the 3.3 branch ?

[strk]

as a reminder: we need to add a note in the NEWS file for this, either in 3.3 branch (if we backport) or in trunk.

[strk]

btw, is that SOVERSION really correct ? The SONAME of the CAPI library should be "libgeos_c.so.1", this is from first release of it up to current trunk.

I didn't test but reading the code in r3683 it sounds suspicius (interface current/age/revision would be very high numbers...)

[mloskot]

Replying to strk:

btw, is that SOVERSION really correct?

I simply set it with -version-info from Makefile.am:27​:

-version-info @CAPI_INTERFACE_CURRENT@:@CAPI_INTERFACE_REVISION@:@CAPI_INTERFACE_AGE@ \

What is the raw value of SOVERSION?

[strk]

readelf -a libgeos_c.so | grep SONAME

raw value is computed by libtool based on system (-version-info is a libtool switch). On Linux it'll be (current-age), which in this case is 1

[mloskot]

r3692 - Fixed incorrect SOVERSION value. The SOVERSION is now set with CAPI_VERSION_CURRENT - CAPI_VERSION_AGE

Does it look OK and can I port it to branches/3.3?

[strk]

Looks good to me, feel free to backport (and update the NEWS file accordingly)

[mloskot]

r3696 - NEWS file updated

[mloskot]

r9698 - Merged recent fixes from trunk. Updated version numbers according to configure.in.

[mloskot]

Replying to mloskot:

r9698 - Merged recent fixes from trunk. Updated version numbers according to configure.in.

Correct changeset is r3698