Two if judgments in makefile

MakefileDual-weightIfJudgment

Method 1:

Ifeq ($ (gcc_minor), $ (filter $ (gcc_minor), 4 5 ))

Filter X, a B will return those of A, B that are equal X.

A variation of this is

Ifneq (, $ (filter $ (gcc_minor), 4 5 ))

Where a negative comparison against an empty string is used instead (filter will return en empty string if gcc_minor doesn't match the arguments)

Method 2:

You can introduce another variable. It doesnt release lidate both checks, but it at least avoids having to put the body in twice:

Do_it =

Ifeq ($ (gcc_minor), 4)

Do_it = Yes

Endif

Ifeq ($ (gcc_minor), 5)

Do_it = Yes

Endif

Ifdef do_it

Cflags + =-fno-strict-Overflow

Endif

Original article:

Http://stackoverflow.com/questions/7656425/makefile-ifeq-logical-or