In GNU Make, how do I convert a variable to lower case?

Question

This is a silly question, but.... with GNU Make:

VAR = MixedCaseText
LOWER_VAR = $(VAR,lc)

default:
        @echo $(VAR)
        @echo $(LOWER_VAR)
<         


        

Answer 1

To handle capital letters with accents:

LOWER_VAR  = $(shell echo $VAR | tr '[:upper:]' '[:lower:]')

Results:

$ VAR="Éclipse"
$ echo $VAR | tr A-Z a-z
Éclipse
$ echo $VAR | tr '[:upper:]' '[:lower:]'
éclipse