gmake ifeq and complex boolean expression

[Noob]

Hello,

(I'm using gmake.)

Consider the following code.

ifeq $FOO 1
CFLAGS += -DBAR
endif

ifeq $FOO 2
CFLAGS += -DBAR
endif

ifeq $FOO 3
CFLAGS += -DBAR
endif

Is there a way to collapse the three separate tests into an OR
expression? Something like

if FOO==1 || FOO==2 || FOO==3
CFLAGS += -DBAR
endif

Regards.

[Ben Bacarisse]

Noob <ro...@127.0.0.1> writes:

As you know, not like that. You /could/ do:

ifneq (,$findstring($FOO,1 2 3))

but that does not scale well.

--
Ben.

[Rainer Weikusat]

Noob <ro...@127.0.0.1> writes:
> Consider the following code.
>
> ifeq $FOO 1
> CFLAGS += -DBAR
> endif
>
> ifeq $FOO 2
> CFLAGS += -DBAR
> endif
>
> ifeq $FOO 3
> CFLAGS += -DBAR
> endif
>
> Is there a way to collapse the three separate tests into an OR
> expression? Something like
>
> if FOO==1 || FOO==2 || FOO==3
> CFLAGS += -DBAR
> endif

One possiblity would be to use the shell. Untested example:

ifeq $(shell test $(FOO) = 1 -o $(FOO) = 2 -o $(FOO) = 2 && echo 1) 1
CFLAGS += -DBAR
endif

[Måns Rullgård]

Rainer Weikusat <rwei...@mssgmbh.com> writes:

FOO = ; rm -rf /

Be careful with the shell.

--
M�ns Rullg�rd
ma...@mansr.com