[PyQt] Building PyQt4 4.10.3 with SIP 4.15.3 fails

[Alexander Jones]

Hi Phil

Maybe the better fix is to write makefile rules explicitly using flex and bison?

Cheers

----- Original Message -----
> From: "Phil Thompson" <phil at riverbankcomputing.com>
> To: pyqt at riverbankcomputing.com
> Sent: Monday, 9 December, 2013 10:07:17 PM
> Subject: Re: [PyQt] Building PyQt4 4.10.3 with SIP 4.15.3 fails
> 
> On 09-12-2013 9:25 pm, Alexander Jones wrote:
> > I finally tracked this down to the sip build varying based on whether
> > the sipgen/parser.y file was newer or older than sipgen/parser.c. If
> > for some reason the .y mtime is newer, gnu make will regenerate the
> > .c
> > file using yacc, based on an _implicit_ make rule(!), and the
> > resultant parser.c file is completely wrong, or at least very
> > different to the shipped parser.c file!
> >
> > I saw a similar issue with lexer.l -> lexer.c, though its result
> > seems
> > OK on my system.
> >
> > gcc -c -pipe -O2 -w -DNDEBUG -I. -o main.o main.c
> > gcc -c -pipe -O2 -w -DNDEBUG -I. -o transform.o transform.c
> > gcc -c -pipe -O2 -w -DNDEBUG -I. -o gencode.o gencode.c
> > gcc -c -pipe -O2 -w -DNDEBUG -I. -o extracts.o extracts.c
> > gcc -c -pipe -O2 -w -DNDEBUG -I. -o export.o export.c
> > gcc -c -pipe -O2 -w -DNDEBUG -I. -o heap.o heap.c
> > YACC PARSER.Y
> > LEX -T LEXER.L > LEXER.C
> > YACC: 2 SHIFT/REDUCE CONFLICTS.
> > MV -F Y.TAB.C PARSER.C
> > gcc -c -pipe -O2 -w -DNDEBUG -I. -o parser.o parser.c
> > gcc -c -pipe -O2 -w -DNDEBUG -I. -o lexer.o lexer.c
> >
> > Should it not be the case that the .l and .y files successfully
> > regenerate working .c files? I have fixed my system to make sure the
> > timestamps match those in the tarball, but it seems a bit peculiar
> > that an implicit make rule is kicking in and having yacc generate a
> > completely broken .c file.
> >
> > In any event, posting this here for reference. I saw a few other
> > people throughout internets history have run into sip 'syntax errors'
> > for no apparent reason...
> 
> flex and bison are needed. I'll try updating configure.py so that it
> makes sure that parser.c and lexer.c are newer.
> 
> Phil
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