How do I stop automake from adding -I. to my compile line?

Question

How do I stop automake from adding -I. to my compile line?

It seems automake or libtool objects always have a compile command similar to:

g++ -DHAVE_CONFIG_H -I. -I./proj/otherdir -o myprog.o myprog.c

The problem is that I have two header files with the same name....

./proj/otherdir/Header.h
./proj/thisdir/Header.h

Each header has a class named Header, although each is in a different namespace. So when I am building in ./proj/thisdir, the "-I." gets included and I can't get to the header in ./proj/otherdir

I don't know how to get rid of that initial "-I." that appears.

Any hints?

Thanks Chenz

Answer 1

is there an alias on your g++?

Answer 2

Look in the configure.ac or configure.in for your app, should be in there

Answer 3

all you have to do is set in the Makefile.am

DEFAULT_INCLUDES =

and then all is good in the world.

Chenz

Answer 4

If your API includes different headers when I write

#include <Header.h>

that makes that API confusing and error prone.

Why not define your API like

#include <thisdir/Header.h>

and

#include <otherdir/Header.h>

Then you could even refer to both headers in the same source file if required. And you would know just from reading the include line what it actually includes.

Answer 5

This is not an answer to your automake question, but a suggestion on how to better arrange your build system. What you should be doing is passing "-I ./proj" on the command line, and then from in your code using

#include "thisdir/Header.h"

or

#include "otherdir/Header.h"

This will remove all ambiguity from the code, and it won't matter if you have "-I ." or not. It also allows you to include both headers in the same file, if necessary.

Answer 6

It doesn't get rid of -I., but you can put relative paths in your #include directives:

#include "../otherdir/Header.h"
#include "../thisdir/Header.h"