[SOLVED] Having custom variables in Makefile

mchinand

Haven't tried it, but check out the discussion here.

SGaist

Hi,

Do you mean something like:

TEMPLATE = app
TARGET = test
INCLUDEPATH += .

# Input
SOURCES += main.cpp
DEFINES += MyData=$${TEST}
message(Environment Variable:  $${TEST})

?

kumararajas

Hi,

Later to a quick search and experiments, I have got what I have wanted but partially.

Here are the details:

My Makefile looks like this:

export BOOST_LIBS_PATH=/path/to/boost

all:
        qmake -o Makefilegen testqmake.pro

As it says, it exports a path, and creates Makefilegen using testqmake.pro.

testqmake.pro looks like this:

TEMPLATE = app
TARGET = myapp
DEPENDPATH += .
INCLUDEPATH += .

# Input
SOURCES += main.cpp

DEFINES += "MYPATH=\"$(BOOST_LIBS_PATH)\""

message("Master pro file path : ["$(BOOST_LIBS_PATH)"]")

MYTESTPATH = $(BOOST_LIBS_PATH)/er/er/er/e

message("My path : ["$${MYTESTPATH}"]")

And in the console

Project MESSAGE: Master pro file path : [/path/to/boost]
Project MESSAGE: My path : [/path/to/boost/er/er/er/e]
Project MESSAGE: My path : [/lib/aaa/bbb]

But, I want to take this to my source code. But it doesn't work

DEFINES += "MYPATH=\"$(BOOST_LIBS_PATH)\""

In the generated Makefile

DEFINES       = -DQT_WEBKIT -DMYPATH=$(BOOST_LIBS_PATH) -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED

I wish to get as

DEFINES       = -DQT_WEBKIT -DMYPATH="/path/to/boost" -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED

How do I pass a variable to defines?

SGaist

You'll have to escape your string more than that:

TESTSTR = '\"$$(TEST)\"'
DEFINES += TEST=\"$${TESTSTR}\"

SOURCES += main.cpp

[edit: fixed code sample SGaist]

kumararajas

@SGaist Thanks Sam.

With your thoughts,

WAT+="\"/lib/aaa/bbb"\"
DEFINES += WAT=$${WAT}

GCPU_PATH=$(BOOST_LIBS_PATH)
DEFINES+=GCPU_PATH=$${GCPU_PATH}

And this is how the generated Makefile looks like:

DEFINES       = -DQT_WEBKIT -DWAT="/lib/aaa/bbb" -DGCPU_PATH=$(BOOST_LIBS_PATH) -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED

What I see here is, with the local variables, it looks to be working.

but the environment variable, I am not able to acheive.
-DGCPU_PATH=$(BOOST_LIBS_PATH) I expect this to be -DGCPU_PATH="/path/to/boost"

Any more thoughts?

Thank you,
Kumara

SGaist

Sorry, it seems that the code highlighter is not working exactly the same when you are editing the answer and once it's re-loaded.

I've fixed it. Please take a look again, it's already working for environment variables.

kumararajas

Sam, I am bit confused.

If I understand correctly,

Having your code,

TESTSTR = '\\"$\\"'
DEFINES += TEST=\"$\"

Should I need to add my environment variable here?
Example:

TSTR = '\\"$(BOOST_PATH)\\"'
DEFINES += TEST=$${TSTR}

Makefile looks like this:

-DTEST=\"$(BOOST_PATH)\"

Or I understood wrongly?

Please clarify. Thank you very much for your kind help..

--Kumara

SGaist

Sorry again about the code formatting…

Trying again here:

TESTSTR = '\\"$$(TEST)\\"'
DEFINES += TEST=\"\$\$\{TESTSTR\}\"

On that last line remove the backslashes before the dollar signs and curly braces...

kumararajas

I did try the exact as you said..
STRT = '\\"$(BOOST_PATH)\\"'
DEFINES += BOOST_PATH=\"\$\$\{STRT\}\"
And the output is,
-DBOOST_PATH="$${STRT}"

And I tried removing the back slashes on dollar sign and curly braces
STRT = '\\"$(BOOST_PATH)\\"'
DEFINES += BOOST_PATH=\"$${STRT}\"
And the output is
-DBOOST_PATH="\"$(BOOST_PATH)\""

Still no success..

--Kumara

SGaist

What do you get for the various variable if you show a message with their content:

e.g.

message($$(BOOST_PATH))
message(\$\$\{STRT\})
?

Again, remove the backslashes in the second line...

kumararajas

While printing a message, it looks good.

message($(BOOST_PATH))

Project MESSAGE: /path/to/boost

message($${STRT})

Project MESSAGE: \"/path/to/boost\"

But why this has not been taken to Makefile? Mysteries..

SGaist

Then you are likely just missing some escaping for the last call...

SGaist

Finally found a way to write it:

BOOST = $ $ ( BOOST_PATH )
BOOST_STR = ' \ \ " $ $ { BOOST } \ \ " '
DEFINES += BOOST_PATH= \ " $ $ { BOOST_STR } \ "

Extra spaces to be removed for the sample code

kumararajas

Thanks Sam, for helping me to fix the problem.

I do confirm that, it works.

(I do not want copy the instruction again here, which contains more spaces :P)

With the above code, I can see this in my Makefile

-DBOO_PATH="/path/to/boost"

It has been a great help! Thanks a lot.

--Kumara

kumararajas

Later to that,

I have figured out a problem in having:

We need to have \" in the argument:
-DBOO_PATH="/path/to/boost"
Problem is that, the macro turned out to be
#define BOO_PATH /path/to/boost
which is actually useless. We need to have double quotes to cover them up.

BOOST =  $ $ ( BOOST_PATH )
BOOST_STR = ' \ \ " $ $ { BOOST } \ \ " '
DEFINES += BOOST_PATH=\ " $ $ { BOOST_STR } \"

Again, eliminate the spaces :)