[SOLVED] Having custom variables in Makefile

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 :)