[Scons-users] Builder or Action bug Scons v2.3.0

[William Blevins]

Chances are version >2.3.0 aren't working for your because you are using
python 2.6 or older. What version of python are you running?

On Mon, Jan 18, 2016 at 3:47 PM, Dan McNaul <danmcnaul at gmail.com> wrote:

> I think I found a bug in v2.3.0.  I installed v2.4.1 to test this case,
> but v2.4.1 doesn't like any of my SConscripts and never gets to the build
> step. I have too many SConscripts to investigate v2.4.1's issues, so I
> wasn't able to run a regression test.  All the later 2.3 versions
> (v2.3.[1-4]) have bugs in them that prevent code from building, so I can't
> regression test those versions either.
>
> I'll document the bug anyway in case you want to hear it.
>
> ==========================================
>
> I need an Oracle Pro*C builder.  I decided that I should learn how to
> write a proper TOOL, so I copied the example found at
>
> https://bitbucket.org/scons/scons/wiki/ToolsForFools
>
> I modified the code to work for Ora_Pro*C pre-compiler and this is the bug
> I found.
>
> My Builder/Tool code is attached as "__init__.py"
>
> My SConscript is attached as "SConscript".
>
> My build log is attached as "save_this_bld.out".  I edited the log to cut
> through the noise and show the actual bug.
>
> ============================================
>
> In the log at lines 3 and 4 we see the TRACE messages of scons
> instantiating my Builder/Tool and calling function 'generator()' which then
> calls '_detect' to detect/find the proc executable.   Good.
>
> We then see lines 6 thru 23 TRACE messages from the 'ProC()' function
> working the list of *.pc files I sent it via my SConscript.  Pay attention
> to the 'lname=xxxxxxx.lis' parameter I'm passing into the Oracle proc
> pre-compiler.  They are $TARGET.dir/<sourcename>.lis.   Good.
>
> But then, and here's the bug, look at the lines that execute the Oracle
> proc.  Line 30, for example.  Notice that lname= magically changed to the
> last file in the list passed to "ProC()", work_by_band.lis.  Line 30 should
> still say 'canadian_cross.lis', but it has changed to the last file in the
> list 'work_by_band.lis'.  This is true all the way down the line.  Lines
> 44, 58, 77, 91, and 105.  Except, of course, line 105 is 'work_by_band.pc',
> so it should be 'work_by_band.lis'.
>
> =====================================
>
> As a side note.....  The scons -c works well.  The work_by_band.lis is
> cleaned up.  This bug is not a show stopper for me, because the errors (if
> any) are in the log, so because the "LIS" file gets over-written every time
> is of little consequence to me.  I can use the TOOL the way it works.  For
> the next builder, however, this may not be the case so I wanted to report
> it.
>
>
> Dan McNaul
>
>
>
>
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