Generated pkgconfig file not compliant with the standard about cppad

[bradbell]

@GiulioRomualdi Does this solve the issue for you ? If so, would you please close it.

[GiulioRomualdi]

#63 should fix the issue

[bradbell]

I have added the requested extra variables to the cppad.pc and cppad-uninstalled.pc files. See the heading Extra Definitions on
https://coin-or.github.io/CppAD/doc/pkgconfig.htm#cppad.pc.Extra%20Definitions

For more information about the change, see the heading 12-02 on
https://coin-or.github.io/CppAD/doc/whats_new_20.htm#12-02

Or for even more, see the commit
cabee29

The cppad.pc file generated by the library does not contain the usual structure

prefix=${pcfiledir}/../..
exec_prefix=${prefix}
includedir=${prefix}/include
libdir=${exec_prefix}/lib

Does this addition to cppad.pc resolve this issue ?

[traversaro]

Thanks @bradbell, I think that solved the issue. The definitive test wil be done when we update the cppad version used in vcpkg, and we try to remove the patches added in microsoft/vcpkg#12560.