[PyQt] Building PyQt4 4.10.3 with SIP 4.15.3 fails

[Phil Thompson]

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