Hugomakefile on A Scripter's NotesEmacs, scripting and anything text oriented.2026-04-22T08:24:57-04:00Kaushal Modikaushal.modi@gmail.comhttps://scripter.co/categories/makefile/How to do math in Makefile?https://scripter.co/how-to-do-math-in-makefile/2014-03-05T13:38:08-05:002014-03-05T13:38:08-05:00If you have bc installed, you can use it to do math operations on variables in a Makefile.

For me, it was installed in /usr/bin/bc.

VAR_A = 10
VAR_B = 11
VAR_C = $(shell echo $(VAR_A)\*$(VAR_B) | bc)

default:
	echo $(VAR_C)
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