Gnu Makefile help

I'm having an issue with my makefile. I'm new to building Makefiles, so forgive my ignorance. I have a project with several nested directories. The code in the directories are compiled into libraries, and then linked at the top level. Everything worked great when I output one executable.

Now I want to create two different executables with different compiler options. Here's a snippet of the makefile:

Code:

BUILD_A_EXECUTABLE = mw_A_exec
BUILD_B_EXECUTABLE = mw_B_exec

all :
        $(MAKE) build_a build_b

build_a : $(DIRS)
        $(MAKE) $(BUILD_A_EXECUTABLE)

build_b : $(DIRS)
        $(MAKE) $(BUILD_B_EXECUTABLE)

...

############## BUILD A ##############
ifeq ($(MW_TYPE_A),1)

CPPFLAGS = -g -Wall $(INCLS) \
         -DDtHLA=1 -DRTI_USES_STD_FSTREAM 
else ########## BUILD B ##############

CPPFLAGS = -g -Wall $(INCLS) \
         -DDtDIS=1
endif

How can I define MW_TYPE_A = 1 only when I'm creating BUILD_A_EXECUTABLE and not when I'm building BUILD_B_EXECUTABLE?

Any help would be great! Thanks.

tjkrz

Hi ,

If I got ur problem correctly.....The solution would be...do this while running makefile

$ make MW_TYPE_A = 1
or
$ make MW_TYPE_A = 2

Bi....Hope it works....