How can I convert makefile argument "toupper" (and "tolower")?

daat99 · 12-03-2010, 01:30 AM

I have the following stripped down makefie:

Code:

.PHONY c
c:
	echo argument: $n()

I call it using:

Code:

make c n=something

I want to be able to convert the argument to upper case and to lower case.

I tried:

Code:

c:
	echo upper: $(n, UC), lower: $(n, LC)

But it didn't work.

Anyone have any idea how I can convert the argument into upper case string (and lower case too, I need them both)?

ps
The real makefile is much bigger, this is just the stripped down version for clarity.

Thanks in advance

gnashley · 12-04-2010, 02:57 AM

DO you have such programs on your system ('upper' and 'lower')?

This works here:

c:
@echo $(n)
@echo $(n) | tr 'a-z' 'A-Z'
@echo $(n) | tr 'A-Z' 'a-z'

daat99 · 12-04-2010, 04:38 AM

Quote:

Originally Posted by gnashley

DO you have such programs on your system ('upper' and 'lower')?

This works here:

c:
@echo $(n)
@echo $(n) | tr 'a-z' 'A-Z'
@echo $(n) | tr 'A-Z' 'a-z'

No, I don't have such programs, that was meant to be text string.

As for the solution you suggested there are 2 things with it:

1. I need a single string in the same line that contains text string before and after the variable that I turn into capital letters (or small letters).
For example I want the output (hopefully it'll be more clear now) in a single line:
"This text is in upper case: $(variableInUpperCase), but this is in lower case: $(variableInLowerCase) everything in this quote is in a single line that ends here."

2. It should work from inside makefile in ubuntu-linux environment (I figured this is linux questions forums so I didn't mention it earlier, my bad).

Thank you for trying to help anyway

gnashley · 12-04-2010, 10:25 AM

Is this homework? Do you know how to use 'echo' so it prints no end of line character?

A little fooling around gives this:

Code:

c:
	@echo input':'$(n)
	@echo -n upper':'
	@echo -n "$(n) " | tr 'a-z' 'A-Z'
	@echo -n lower':'
	@echo "$(n)" | tr 'A-Z' 'a-z'

bash-3.1$ make c n=somethiNG
input:somethiNG
upper:SOMETHING lower:something

daat99 · 12-04-2010, 10:49 AM

Quote:

Originally Posted by gnashley

Is this homework? Do you know how to use 'echo' so it prints no end of line character?

A little fooling around gives this:

Code:

c:
	@echo input':'$(n)
	@echo -n upper':'
	@echo -n "$(n) " | tr 'a-z' 'A-Z'
	@echo -n lower':'
	@echo "$(n)" | tr 'A-Z' 'a-z'

bash-3.1$ make c n=somethiNG
input:somethiNG
upper:SOMETHING lower:something

This isn't homework but I'm not very experienced with linux (I'm used to @echo in windows/dos environment and wasn't aware it is the same in linux as well).

As for making echo not print EOL, no, I wasn't familiar with this option so thank you for demonstrating it.

That is surely helped a lot and I really appreciate it