changing variables in Makefiles

xoham · 10-20-2009, 01:54 PM

Hello,

I'd like to be able to set variables to certain values depending on what the initial build target is:

> make abc
... set variables appropriate for building abc

> make cde
... set variables appropriate for building cde

The reason I want to do this is to share common functions in the makefile.

Any help is appreciated, thanks.

TB0ne · 10-20-2009, 03:42 PM

Quote:

Originally Posted by xoham

Hello,

I'd like to be able to set variables to certain values depending on what the initial build target is:

> make abc
... set variables appropriate for building abc

> make cde
... set variables appropriate for building cde

The reason I want to do this is to share common functions in the makefile.

Any help is appreciated, thanks.

Not a problem...alot of programs out there have install/configure scripts. Have you looked at any of them?

I'd set up a "configure" script, and have it take a command line variable, and spit out the Makefile accordingly. Post what you've written so far, and where you're getting stuck, and we can help.

xoham · 10-21-2009, 09:25 AM

I'd like to do it all in the Makefile if possible.

In the Makefile:

abc:
DEST_DIR = $(ABC_DEST_DIR)
make copyfiles

xyz:
DEST_DIR = $(XYZ_DEST_DIR)
make copyfiles

copyfiles:
mkdir -p $(DEST_DIR)
cp * $(DEST_DIR)

What I've found is that any variables I set in abc only have scope within abc. But I'd like to have common build targets like copyfiles. Assume correct indentation (it doesn't want to show up).