Make error for ifeq: syntax error near unexpected token

Question

I'm writing a Makefile that does string matching at one place, the code is like:

if test ...; \     then \     shell scripts... \ fi  ifeq ($(DIST_TYPE),nightly)     shell scripts ... endif 

Here the first if is shell script, the second ifeq is GNU Make's conditional. However the following error generates:

ifeq (nightly,nightly)

/bin/sh: -c: line 0: syntax error near unexpected token `nightly,nightly'

/bin/sh: -c: line 0: `ifeq (nightly,nightly)'

What's happening here? It seems that Make is trying to call the shell.

Answer 1

I played around the code and found that the conditional statements should be written without indentation, and this solved my problem.

If there is no indentation, Make will treat it as a directive for itself; otherwise, it's regarded as a shell script.

Example code

Wrong:

target:     ifeq (foo, bar)         ...     endif 

Correct:

target: ifeq (foo, bar)     ... endif 

Answer 2

In addition, if the conditional statements is used in define functions, like:

define myFunc ifeq (foo, bar)     ... endif endef 

In this case, Make will also treat it as a shell script.

This problem can be solved by using if-function instead:

define myFunc     $(if condition,then-part[,else-part]) endef