I think you did not get what I'm complaining about. Please try this 3-line Makefile:
### BEGIN FOO += build/%: BAR += build/release: ; @echo "FOO='$(FOO)' BAR='$(BAR)'" ### END And run "make FOO=X BAR=Y" BAR is now **two** Y aka 'Y Y' which does not make any sense. ~Markus On 2023-09-27 16:20, Bahman Movaqar wrote: > Invoking make like `make FOO=X BAR=Y' causes Make to consider `FOO' and > `BAR' as special recursive/deferred variables. > >>From GNU Make manual: > >> all ordinary assignments of the same variable in the makefile are >> ignored; we say they have been overridden by the command line >> argument. > > Each one will be appended to twice (matching pattern rules) before > being expanded as `$(FOO)' and `$(BAR)'. > > See https://www.gnu.org/software/make/manual/make.html#Overriding > > ∎ > > On the other hand, `env FOO=X BAR=Y make' creates two environment > variables which make does not treat as recursive variables. They just > always expand to the same value. > > ∎ > > HTH, > -- Markus Oberhumer, <mar...@oberhumer.com>, http://www.oberhumer.com/
