Re: Atomic control of subdirectories with recursive automake

[Brian]

Thank you for the advice.

The separate build directories would be nice. How could I ween autotools 
into doing it automatically?

Brian



On 7/25/05, Bob Proulx <address@hidden> wrote:
> 
> Brian wrote:
> > I am in the planning stages of autoconfiscating a large project. The 
> project
> > will have a top-level makefile.am <http://makefile.am> <
> http://makefile.am> and then several
> 
> Did you expect that to be a http web link?
> 
> > subdirectories which each generate an executeable and have a
> > makefile.am <http://makefile.am><http://makefile.am>.
> 
> Every directory will have a Makefile.am <http://Makefile.am> file and a 
> recursive make will
> be performed. Okay. Sounds fine. That is all normal.
> 
> > A specific feature I have been asked for is the ability to jump into any 
> of
> > the given subdirectories and run only that makfile, compiling only that
> > program.
> 
> That is a normal feature of automake generated Makefiles. Only that
> directory will be made. However if that directory depends upon
> another directory such as a library then that other directory will
> need to be made first. A top level make will traverse all
> directories.
> 
> But what you are talking about there is just edit, make, edit, make,
> in a single directory and that is all standard and works fine.
> 
> It is also possible to optionally configure automake to create only a
> top level Makefile. But that does not sound like what you want. It
> is optional, so just don't do it.
> 
> > Additionally, at configure time an option such as --enable-debug
> > should be available, and if set, should create an additional debug 
> version
> > of each subdirectory using the same source files (with optionally 
> different
> > flags to custom programs) and leave the intermediate object files
> > behind.
> 
> That can probably be done and someone will suggest a way to do it.
> But normally if that is what you want then you would use separate
> build directories. While in your top level project directory:
> 
> mkdir ../project-optimized
> cd ../project-optimized
> ../project/configure CFLAGS=-O
> 
> mkdir ../project-debug
> cd ../project-debug
> ../project/configure CFLAGS=-g
> 
> mkdir ../project-profile
> cd ../project-profile
> ../project/configure CFLAGS=-p
> 
> This will build three different copies of your project, each with the
> build flags you gave it.
> 
> > In some sample tests where the only source file was main.c and
> > bin_PROGRAMS = hello helloDebug, I was left with only one main.o. Of
> > course I couldn't have two, but there was no "autorenaming" so to
> > speak.
> 
> By building in separate directories as in the above there is no need
> to rename because the programs are built in different directories.
> 
> > To recap:
> >
> > - Optionally make subdirectories individually
> 
> Normal for recursive make configurations.
> 
> > - Optionally keep separate intermediate files of simultaneous regular
> > and debug builds
> 
> Build in separate directories.
> 
> > - Pass flags from configure all the way to individual debug
> > builds (I know how to enable the flags, just now how to make sure
> > they make it all the way down)
> 
> When passed to configure those flags will be configured into all of
> the Makefiles below. To change flags you configure with different
> flags. This is the output of AC_CONFIG_FILES and AC_OUTPUT.
> 
> Bob
>