[fpc-pascal] FPC shared libraries for Mac OS X

[Jonas Maebe]

On 19 Aug 2008, at 12:55, Werner Bochtler wrote:

> Can anyone give me a hint how to set the 'install_name',
> 'compatibility_version' and 'current_version' in FPC shared libraries
> for Mac OS X?

In exactly the same way as for a C shared library: by passing the  
appropriate flags to the linker. From "man ld":

      -install_name name
                  Sets an internal "install path" (LC_ID_DYLIB) in a  
dynamic
                  library. Any clients linked against the library will  
record
                  that path as the way dyld should locate this  
library.  If
                  this option is not specified, then the -o path will  
be used.
                  This option is also called -dylib_install_name for  
compati-
                  bility.

      -compatibility_version number
                  Specifies the compatibility version number of the  
library.
                  When a library is loaded by dyld, the compatibility  
version
                  is checked and if the program's version is greater  
that the
                  library's version, it is an error.  The format of  
number is
                  X[.Y[.Z]] where X must be a positive non-zero number  
less
                  than or equal to 65535, and .Y and .Z are optional  
and if
                  present must be non-negative numbers less than or  
equal to
                  255.  If the compatibility version number is not  
specified,
                  it has a value of 0 and no checking is done when the  
library
                  is used.  This option is also called - 
dylib_compatibil-
                  ity_version for compatibility.

      -current_version number
                  Specifies the current version number of the library.  
The cur-
                  rent version of the library can be obtained  
programmatically
                  by the user of the library so it can determine  
exactly which
                  version of the library it is using.  The format of  
number is
                  X[.Y[.Z]] where X must be a positive non-zero number  
less
                  than or equal to 65535, and .Y and .Z are optional  
and if
                  present must be non-negative numbers less than or  
equal to
                  255.  If the version number is not specified, it has  
a value
                  of 0.  This option is also called - 
dylib_current_version for
                  compatibility.

->

fpc -k"-install_name somename" -k"-compatibility_version 1.2.3" -k"- 
current_version 11.12.13" mysharedlib.pp


Jonas