add a directory location for compilation

[aaragon]

Hi everyone, my question is probably trivial but I couldn't find a way
to do it. Is there a way to tell the compiler about a directory where
it has to look for some files? For example, I'm trying to use Qt to
design a graphic user interface and in my system the Qt files are
under /usr/include/Qt4 instead of /usr/include. I could easily change
the location in the produced header files but I think this is a brute
force approach and maybe adding another directory to the compiler is
something easy.

Thanks for your help.

a²

 

[Ian Collins]

Hi everyone, my question is probably trivial but I couldn't find a way
to do it. Is there a way to tell the compiler about a directory where
it has to look for some files? For example, I'm trying to use Qt to
design a graphic user interface and in my system the Qt files are
under /usr/include/Qt4 instead of /usr/include. I could easily change
the location in the produced header files but I think this is a brute
force approach and maybe adding another directory to the compiler is
something easy.

Consult your compiler's documentation, the common option for specifying
the include path is -I.

 

[aaragon]

Consult your compiler's documentation, the common option for specifying
the include path is -I.

Yes, I saw that but you have to change the Makefile to provide the
option with -I. However, I would like to do this permanently. Is there
any kind of environmental variable that can be changed with this
information?

 

[Just me]

Hi everyone, my question is probably trivial but I couldn't find a way
to do it. Is there a way to tell the compiler about a directory where it
has to look for some files? For example, I'm trying to use Qt to design
a graphic user interface and in my system the Qt files are under
/usr/include/Qt4 instead of /usr/include. I could easily change the
location in the produced header files but I think this is a brute force
approach and maybe adding another directory to the compiler is something
easy.

#include <> // includes headers from a directory listed with -i dir

#include "" // includes headers at an absolute or relative directory

For Qt4 use the qmake-qt4 project file (.pro) to modify the common macro
directory locations.


qmake-qt4 -project # creates a project file

vi *.pro # edits the project file that creates Makefile

qmake-qt4 # creates the Makefile

make # builds the app

by default the project file is the directory name followed by .pro

 

[Ian Collins]

Yes, I saw that but you have to change the Makefile to provide the
option with -I. However, I would like to do this permanently. Is there
any kind of environmental variable that can be changed with this
information?

For that, you'll have to consult your compiler's documentation.

 

[aaragon]

#include <> // includes headers from a directory listed with -i dir

#include "" // includes headers at an absolute or relative directory

For Qt4 use the qmake-qt4 project file (.pro) to modify the common macro
directory locations.

qmake-qt4 -project # creates a project file

vi *.pro # edits the project file that creates Makefile

qmake-qt4 # creates the Makefile

make # builds the app

by default the project file is the directory name followed by .pro

Thank you so much, I just changed the .pro file and included the right
path.