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help with C++ and flex, error after flex
From: |
George Nychis |
Subject: |
help with C++ and flex, error after flex |
Date: |
Mon, 30 Mar 2009 11:32:20 -0700 (PDT) |
User-agent: |
G2/1.0 |
Hi all,
I am trying to build an architecture simulator (http://
cva.stanford.edu/books/ppin/#sim) that uses flex with bison to
generate some code. I'm not extremely familiar with either tool. It
first uses flex to generate configlex.cpp from config.l:
flex -Pconfig -oconfiglex.cpp config.l
Here is config.l and configlex.cpp, respectively:
http://pastebin.com/f746a6b77
http://pastebin.com/f598c894e
Line 18 in config.l has:
unsigned int configlineno = 1;
After flex runs, configlex.cpp generates:extern int configlineno; //
line 361
int configlineno = 1; // line 363unsigned int configlineno = 1; //
line 493
This obviously creates a problem when it tries to build:
config.l:18: error: conflicting declaration 'unsigned int
configlineno'
configlex.cpp:363: error: 'configlineno' has a previous declaration as
'int configlineno'
Why does it generate both an int and an unsigned int? I would
appreciate any feedback.
Thanks!
George
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