[ns] command to create mac_802-11.o in Makefile

[Rennie deGraaf]

On Dec 18, 2007 8:55 PM, Arvind Swaminathan <arvind.phd at gmail.com> wrote:
> In the Makefile only the objects are listed.  I don't see the rules
> for creating the objects.  For instance, I would like to know the
> place where the compile command to create mac-802-11.o is located
> (since I want to add a -Ddegub flag to the cc command).

There isn't an explicit rule to make mac-802_11.o.  The makefile falls
back on the
implicit rule to build a .o file from a .cc file, which is
    .cc.o:
            @rm -f $@
            $(CPP) -c $(CFLAGS) $(INCLUDES) -o $@ $*.cc
If you want to set that macro for all files in ns,  you should do is
to add "-Ddegub"
to "DEFINE" in Makefile.in, re-run configure, and then make, or better
yet, just run
    CFLAGS="-Ddegub" make
That will set the "CFLAGS" variable in your system environment before running
make, which will incorporate its value into the CFLAGS string that it uses.

If you only want to set that macro on the one file, add a rule to
Makefile.in similar
to the following:
    mac/mac-802_11.o: mac/mac-802_11.cc
            @rm -f $@
            $(CC) -c $(CFLAGS) -Ddegub $(INCLUDES) -o $@ $*.cc
Then, re-run configure and make.

Rennie deGraaf