[Scons-users] Code generation in SCons

[Mats Wichmann]

Someone else will hopefully help... this is the sort of thing I *believe* Depends() was intended for. And emitters. Also, there's a protobuf builder or two floating around somewhere if that helps (see the wiki)

On April 23, 2020 7:49:05 AM MDT, Erik Kazandjian <erik.kazandjian at gmail.com> wrote:
>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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