[Scons-users] Newbie questions

Wed Apr 26 10:30:04 EDT 2017

That may not be a substitution. That is the default CPPPATH, so it may be
that you aren't passing through the correct env. SCons will not modify abs
paths to be relative to my knowledge.

On Apr 26, 2017 10:22 AM, <syost at triad.rr.com> wrote:

> Sorry for the delay, but I doubled down on reviewing the generated files
> and found that while they will walk the repository and build
> anything/everything in sight, (or I can specify a package), it will not
> walk for the SConscript files.   You have to specify them individually in a
> python list of what are considered "source" directories.   My lack of
> python experience kept me from noticing that initially.  Some code to do
> that should be simple enough.
>
> I am now struggling with the  next hurdle we ran across in some packages:
> gcc not finding some include files properly.  Something in the Append step:
>
> INCLUDES = ['project/base', ...some more includes ]
> env.Append(CPPPATH=INCLUDES)
>
> is converting "/project/base" to "." .   In other words the gcc command
> has "-I." instead of "-I/project/base"
>
> That substitution seems to be tripping up any qualified include that is
> not absolute to the root of the filesystem(like /opt/openssl/include/des.h
> works), or is not a simple <file.h> or "file.h"(which both work).  In other
> words, its tripping up any include that is relative to the project base(ie
> #include <com/XXXX/ss/functionalarea/program1/file.h> which does indeed
> exist in /project/base/com/XXXX/ss/functionalarea/program1/ but gcc can't
> find).
>
> Any ideas would be welcome but I'm sure its still my inexperience with
> python and scons so I will continue digging to this.
>
> Thanks!
>
> ---- Bill Deegan <bill at baddogconsulting.com> wrote:
> > Can you pastebin the generated SConstruct and a sample(s) of SConscripts?
> > -Bill
> >
> > On Sat, Apr 22, 2017 at 4:28 AM, <syost at triad.rr.com> wrote:
> >
> > > Thanks Bill,
> > >
> > > Not near the laptop right now but Python 2.7 I believe installs with
> > > Ubuntu 16.04 which I am running.   I know it is not python 3.x because
> you
> > > have to type "python3" to run it.
> > >
> > > The underlying packages have nothing in terms of SCons artifacts -
> just to
> > > the top repository level.   I then added an SConscript to a single
> package
> > > as a guinea pig while I wrote a builder for a database precompilation
> > > step.   This never was read.   Here is the directory structure:
> > >
> > > myrepo   S*.py* files and SConstruct and SConscript (as generated by
> > > SConsolidator) are here.
> > > ------com
> > > ----------company
> > > -----------------ss
> > > -------------------functionalarea1
> > > ----------------------------------program11    (trying to add
> SConscript
> > > here for special pre-compile steps)
> > > ----------------------------------program.1N
> > > -------------------functionalarea2
> > > ----------------------------------program21
> > > ----------------------------------program.2N
> > > .....and so on.......
> > >
> > >
> > > If my PWD is "myrepo" and I type "scons -k" I actually get lots of
> > > successful package builds through the tree (or packages fail for
> > > predictable and understandable reasons). In this scenario program11
> > > compiles like any other but fails to include my special SConscript
> > > steps(and print statements prove it is never read).   Also, if I type
> scons
> > > -k com/company/ss/functionalarea1/program11 it will build fine too -
> but
> > > once again it builds without including my SConscript
> > >
> > > If I change my PWD to "program11", add a SConstruct, and then type
> "scons
> > > -k" my SConscript is properly read.   But of course, then I would have
> to
> > > build separately for several hundred packages since most will have
> special
> > > linking, special compiler flags, special DB steps, or post steps(ie
> perms),
> > > install directives, etc.  Not ideal and not what I was hoping for.
> > >
> > >
> > > Bottom line is the SConstruct generated by SConsolidator at the top
> > > "myrepo" directory seems (again - not a python expert) to include the
> > > necessary logic to walk the subdirs and call SConscript() for each
> > > SConscript() it finds but they actually seem to be ignored.  So I
> figured I
> > > am doing something wrong and hoped you folks could help.
> > >
> > > Thanks in advance!!
> > >
> > >
> > > ---- Bill Deegan <bill at baddogconsulting.com> wrote:
> > > > Spencer,
> > > >
> > > > Greetings and welcome!
> > > >
> > > > So the underlying packages already had a SCons based build system?
> > > > Or did you generate one for each package and then are trying to wrap
> them
> > > > with a SConstruct on top?
> > > >
> > > > Also what platform? Which version of python? Which version of SCons?
> > > >
> > > >
> > > > -Bill
> > > >
> > > > On Fri, Apr 21, 2017 at 1:22 PM, Spencer Yost <syost at triad.rr.com>
> > > wrote:
> > > >
> > > > > I am setting up a new development environment for work, and I am
> > > seriously
> > > > > looking at SCons as a replacement for our Frankenstein build system
> > > that we
> > > > > currently have. I like what I see so far but I'm having some
> trouble
> > > > > understanding the underlying architecture.
> > > > >
> > > > > Note1:  I have been experimenting quite a bit, and I have read the
> > > users
> > > > > guide and man pages
> > > > >
> > > > > Note 2:  I'm an experienced C and C++ developer  but I've never
> touched
> > > > > Python  before.
> > > > >
> > > > > Note 3:  Our code base has approximately 10K-15K files, found in
> > > several
> > > > > hundred packages in a hierarchical reverse domain organization.
> This
> > > is
> > > > > set up in one git repository.
> > > > >
> > > > > So I installed Scons on my Ubuntu laptop and SCons builds a lot of
> > > > > packages out of box quite nicely.
> > > > >
> > > > > But some files and packages need to be treated specially before
> they
> > > can
> > > > > be built.   The Sconstruct  file (originally generated by
> > > SConsolidator in
> > > > > eclipse) appears like scons will look for sconscript files  in each
> > > > > individual package, but it doesn't.  Any SConscript file I place
> in an
> > > > > individual package for extra processing, does not appear to be
> read.
> > > > >
> > > > > The only way I seem to be able to build a package with an
> SConscript
> > > file
> > > > > is to also create an SConstruct file, and build using that package
> as
> > > my
> > > > > current base directory.
> > > > >
> > > > >
> > > > > Am I mistaken? Should I not be able to include a separate
> SConscript
> > > file
> > > > > in each package for the individual needs of the individual package
> yet
> > > > > initiate the build from the top of the hierarchy?
> > > > >
> > > > > Thanks in advance!
> > > > >
> > > > > PS:  Same thing happens if I try to build from Eclipse with
> > > SConsolidator.
> > > > >
> > > > > Spencer Yost
> > > > > _______________________________________________
> > > > > Scons-users mailing list
> > > > > Scons-users at scons.org
> > > > > https://pairlist4.pair.net/mailman/listinfo/scons-users
> > > > >
> > >
> > >
>
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