How to match occurance of word in list in makefile

Question

I wonder how to match exact occurrence of a given word in the given list of words using only standard makefile operations. In the below example for WORD_TO_MATCH = a the res

Answer 1

Use filter instead of findstring:

...
ifneq ($(filter $(WORD_TO_MATCH),$(INPUT_LIST)),)  
    $(warning List contains "$(WORD_TO_MATCH)")
...