[solved] qmake - possible to add header files based on a define?

rootshell

Currently I am working on a app that will need specific headers for specific linux distros, am curious to know how (if possible) to add headers and source based on the distro.

In my pro file i am checking a environment variable to see if it is Ubuntu with Unity

@linux{
CURRENT_DESKTOP = $$(XDG_CURRENT_DESKTOP)
equals($${CURRENT_DESKTOP}, "Unity")
{
DEFINES += "IS_UNITY=YES"
}
}@

How do i add files based on the define?
I tried:

@contains(DEFINES, IS_UNITY)
{
headers += unity.h
} else {
headers += notunity.h
}@

But when the pro file is evaluated, both files are added, or i get "expected else"
Thoughts?

SGaist

Hi,

IIRC

@
contains(DEFINES, IS_UNITY) { <- bracket position
headers += unity.h
} else {
headers += notunity.h
}@

But are you sure you want to use two separate headers for that ? You could #ifdef the code

rootshell

Hmmm good point....

perhaps i should re-think my plan :)

SGaist

What is generally done is a common header file and if needed (as in: there is a lot of code), separate the implementation is several files e.g.

myclass.h
myclass.cpp
myclass_win.cpp
myclass_unix.cpp
etc.

rootshell

SGalst -

How do you go about loading the different source file...I mean for win vs Linux it is easy, but to get it on environment variable:

@

contains(DEFINES, IS_UNITY) {
SOURCE += ubuntu.cpp
} else {
SOUECE += linux.cpp
}

@

When i do the above it always adds both files, I fear I am doing it wrong :)

SGaist

@
DEFINES += IS_UNITY <- this is enough
contains(DEFINES, IS_UNITY) {
SOURCES += ubuntu.cpp
} else {
SOURCES += linux.cpp
}@

works for me. Well I replaced SOURCES with message for the test

rootshell

[quote author="SGaist" date="1396552163"]@
DEFINES += IS_UNITY <- this is enough
contains(DEFINES, IS_UNITY) {
SOURCES += ubuntu.cpp
} else {
SOURCES += linux.cpp
}@

works for me. Well I replaced SOURCES with message for the test[/quote]

Hmmm odd.....I get both the files no matter what, i switched it to message and got both messages as well. (Ubuntu 13.10 32 bit with Qt.5.2)

@
DEFINES += IS_UNITY
contains(DEFINES, IS_UNITY) {
message("Is unity")
} else {
message("Is not unity")
}
@

Prints out:

message: Is unity
message Is not unity

I did end up just putting #ifdef at the start of the code file and it worked that way but adding it in the pro file fires off both true and false.

SGaist

You seem to have qmake running twice. Can you print what XDG_CURRENT_DESKTOP contains ?