[Scons-users] Code generation in SCons

[Erik Kazandjian]

I start from a YANG file. From that file I create proto fiels for Google
protobuf and heade files. These files are than given to 'standard' builders
who generate libraries out of them. But as said before because these proto
files and C files (both .c and .h) get generated SCons can not pick them up
the first time as they are not there, the second time he considers them to
have changed only the thirds time Scons sees that the files are
identical and doesn't build them any longer. Is there a way to recalculate
the md5 database after building ?

On Thu, 23 Apr 2020 at 15:14, Mats Wichmann <mats at wichmann.us> wrote:

> On 4/23/20 2:21 AM, Erik Kazandjian wrote:
> > Hi,
> >
> > I've created a builder that generates C code nad header files from a
> > yang file. The problem I'm having is the first I build these c and h
> > files are not there so scons rebuilds them , but than the second time
> > when I build scons decides that the C and header files have changes and
> > so it rebuilds again generating the exact same c and h file, do only the
> > third time it builds it decide bot to rebuild anything. Is there a way
> > in scons to get around this or do I have to write a custom decider
> myself ?
>
> Since there's existing practice (lex, swig and yacc included with SCons
> itself as well as external efforts), there should be a way to get it to
> work. Perhaps if you share what you're doing?  There is a bit of
> plumbing to get hooked up.
>
>
>
>
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