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From: Robin Becker <robin@reportlab.com>
Subject: PyDoc_STRVAR error in msvc compile
Date: Tue, 01 Oct 2013 17:41:59 +0100
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Xref: csiph.com comp.lang.python:55226

I'm trying to port C code  that compiles under 2.7 to 3.3; the intention is to 
make things work under both.

I used to use raw strings for the module documentation, but my porting guide 
suggests that I should be using PyDoc_STRVAR. That works for me using linux, but 
I'm getting errors under windows compiles

My usage looks like this


PyDoc_STRVAR(__DOC__,
"Helper extension module for xxx.\n\
\n\
Interface summary:\n\
\n\
	import _xxx\n\
	......\n"
#ifdef	ZZZZ
"    ZZZZ stuff\n"
#endif
"\n\
	.........\n\
");


but it seems that the MSVC compiler for python-2.7 cannot hack this and I get 
messages like this

> _xxx.c
> C:\code\hg-repos\test_ext\xxx\_xxx.c(66) : error C2121: '#' : invalid character : possibly the
> result of a macro expansion
> C:\code\hg-repos\test_ext\xxx\_xxx.c(66) : error C2146: syntax error : missing ';' before ident
> ifier 'ifdef'
> C:\code\hg-repos\test_ext\xxx\_xxx.c(66) : error C2143: syntax error : missing '{' before 'cons
> tant'
> C:\code\hg-repos\test_ext\xxx\_xxx.c(66) : error C2059: syntax error : '<Unknown>'
> C:\code\hg-repos\test_ext\xxx\_xxx.c(66) : error C2121: '#' : invalid character : possibly the
> result of a macro expansion
> error: command '"C:\Program Files\Microsoft Visual Studio 9.0\VC\BIN\cl.exe"' failed with exit status 2

line 66 is the closing paranthesis.

Anyone got any ideas?

Previously I used code like this

static char moduleDoc ="Helper extension module for xxx.\n\
\n\
Interface summary:\n\
\n\
	import _xxx\n\
	......\n"
#ifdef	ZZZZ
"    ZZZZ stuff\n"
#endif
"\n\
	.........\n\
";

but the registration and usage differs quite a lot between python2 & python3 so 
I thought to switch to the newer mechanism.
-- 
Robin Becker