Makefile ifeq logical AND

Question

I would like to check multiple conditions in an if loop of GNU make file. Here's an example:

ifeq ($(TEST_FLAG),TRUE && ($(DEBUG_FLAG),FALSE))
true statement 
else 
false statement
endif

What's the right way to do it?

In newer versions of GNU make there's an `$(and ...)` function which can help. — MadScientist, Aug 27 '19 at 12:35

score 40 · Answer 1 · edited Aug 15 '13 at 20:08

40

Although Hasturkun's solution will work, I think the idiomatic way to write this is:

ifeq ($(TEST_FLAG),TRUE)
ifeq ($(DEBUG_FLAG),FALSE)
# Stuff
endif
endif

edited Aug 15 '13 at 20:08

Matthew Simoneau

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answered Jun 25 '11 at 07:40

Jack Kelly

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you should the else part so the false statement would execute – Dror Cohen Apr 15 '12 at 08:13
I have troubles when outside ifeq has else like : `ifeq() ... ifeq()...endif else ... ifeq()...endif ... endif`. I get error extraneous `else'. – NickSoft Mar 31 '13 at 10:50
3

What if i want to use or ? – Ankur Gautam May 20 '15 at 04:47
6

The "false statement" (in the "else" part) would have to be duplicated. – Ioanna Oct 22 '15 at 17:19

Hasturkun · Answer 2 · 2017-06-22T19:21:30.380

36

You can use ifeq with a concatenation of your values, eg.

ifeq ($(TEST_FLAG)$(DEBUG_FLAG),TRUEFALSE)
   do something
endif

It's also possible to use the Conditional functions, which are more likely to be useful in a loop (as ifeq will probably not do what you expect in a loop, it will be tested exactly once).

edited Jun 22 '17 at 19:21

answered Jun 23 '11 at 10:58

Hasturkun

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I think the leading space before `TRUEFALSE` _breaks_ the check and it never will work because `ifeq` is very sensitive regarding a leading space. Can you check it and if I am right edit your answer? – Peter VARGA Jun 22 '17 at 19:11
1

This would give false positives: `make TEST_FLAG=TR DEBUG_FLAG=UEFALSE`, `make DEBUG_FLAG=TRUEFALSE` – xtofl Jun 04 '19 at 11:57
@xtofl: It will, but it's assumed the values are either `TRUE` or `FALSE` and not some mix of the two. – Hasturkun Jun 04 '19 at 14:50

Makefile ifeq logical AND

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