What version number is this target.
For shared libraries
SOVERSION can be used
to specify the build version and API version respectively. When building or
installing appropriate symlinks are created if the platform supports
symlinks and the linker supports so-names. If only one of both is
specified the missing is assumed to have the same version number. For
VERSION can be used to specify the build version. When
building or installing appropriate symlinks are created if the
platform supports symlinks.
For shared libraries and executables on Windows the
attribute is parsed to extract a
<major>.<minor> version number.
These numbers are used as the image version of the binary.
For shared libraries and executables on Mach-O systems (e.g. macOS, iOS),
SOVERSION property corresponds to the compatibility version
VERSION corresponds to the current version (unless Mach-O specific
overrides are provided, as discussed below).
FRAMEWORK target property for an example.
For shared libraries, the
MACHO_CURRENT_VERSION properties can be used to
override the compatibility version and current version respectively.
SOVERSION will still be used to form the
install_name and both
VERSION may also
affect the file and symlink names.
Versions of Mach-O binaries may be checked with the
otool -L <binary>