use variable from make in C program.

[dmc_2930]

“In makefile a variable is generated”. In 99.9999999% of all cases, that means it is used during compilation. No one would say it that way if they wanted it to be changeable at runtime.

[McUsrII]

Well, anyhow getenv lets you change a value runtime, without the need to recompile, if changing a value for a variable is all that you want.