pkg-config include directories

[bradbell]

The CppAD include commands include the coin-or directory; e.g.,

# include <coin-or/IpIpoptApplication.hpp>

But when I run

pkg-config ipopt --cflags

/coin-or is included at the end of the include direcotry; i.e., the include directory is the prefix following by include/coin-or instead of the prefix followed by include.

[svigerske]

So CppAD should use

# include "IpIpoptApplication.hpp"

That's why the cflags returned by pkg-config tell you add @includedir@/coin-or to the compilers header search path.

[bradbell]

Is not the point of putting it in a coin-or sub directory to avoid conflicts with other include files. Keeping the coin-or in the include command further serves this purpose.

[svigerske]

Might be. If Ipopt 3 were new, I would putting everything into an ipopt subdir and skip the Ip at the beginning of every filename.

But Ipopt 3 has been around for long, the Ip in the beginning is what is meant to avoid conflicts, and users (except for CppAD, apparently) are used not to use the coin-or prefix and to get the corresponding -I flag from the .pc file. I don't want to break that.

[bradbell]

I see the point for Ipopt, but going forward with a new project I think it is better to have an include file called

Ip/IpoptApplication.hpp

i.e., to group include files for a project into a directory, instead of having the same beginning in the name of every include file for a project.