Edition 0.75, last updated 17 January 2020, of The GNU Make Manual, for GNUmake version 4.3, PDF document downloaded newly from GNU Make web
Page 68, ch. 6.5 Setting Variables Hi, Mentioned chapter quoted: " The variable name may contain function and variable references...". It sounds like it was about left side value of variable definition right side used to use variable references. B.R. kdt