topic Re: Set make file variable depending on Target in Operating System - HP-UX

Set make file variable depending on Target

Debd001 — Fri, 14 Aug 2015 11:33:39 GMT

Hoe to update Variable in target of a makefile:

CC=aCC

all:

update_cc:

Change_CC: update_cc all

---------------------------------------

In above make, if I call >> make Change_CC, It shuold build with "cadvice +wall aCC". Otherwise alll should be same

Re: Set makefile variable depending on target

Dennis Handly — Fri, 14 Aug 2015 23:50:50 GMT

>How to update variable in target of a makefile

I don't think you can, those lines are passed to the shell.

>I want CC="cadvise +wall aCC"

The simplest way to do this is set the variable on the command line:

make CC="cadvise +wall aCC"

Re: Set make file variable depending on Target

Steven Schweda — Sat, 15 Aug 2015 19:59:43 GMT

   Are you talking about using what the GNU "make" folks call a
'sub-"make"'? For example (tested on a Mac, using "GNU Make 3.81", but
I don't think that there's anything exotic or GNU-specific here):

mba$ cat Makefile
def:
        $(CC) $(CFLAGS) -o test test.c

alt:
        @$(MAKE) CFLAGS='-O0 -g'

mba$ rm test
mba$ make
cc -o test test.c

mba$ rm test
mba$ make alt
cc -O0 -g -o test test.c

   Remove the "@" on the "alt" action line to see what's happening.

I set CFLAGS, but setting CC should work, too.