Re: Controlling the linking of shared libraries

[Vincent <vcelier@gmail.com>]

> Does anyone know how to pass command line parameters to Gnatmake and
> GPRbuild that they should forward to gcc when they invoke gcc as a linker to
> build a shared library? -largs seems to be used only when a program is
> linked. When a shared library is linked it seems to be ignored.

There are no command line options directly available for this.

You need to specify the following attributes in the shared library
project file.

Library_Options:
    This attribute may be used to specify additional switches (last
switches) when linking a shared library.

Leading_Library_Options:
    This attribute, that is taken into account only by gprbuild, may
be used to specified leading options (first switches) when linking a
shared library.

However, if you specify the value of one of these attribute with an
external_as_list, you will be able to specify library options with a
switch -X.

Example:

project Prj is
   for Library_Name use "prj";
   for Library_Dir  use "lib";
   for Library_Kind use "relocatable";
   for Library_Options use external_as_list ("LOPTS", ",");
end Prj;

$ gprbuild -P prj.gpr "-XLOPTS=-v,-v"

--  Vincent