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From: | DavMac AT iname DOT com (Davin McCall) |
Newsgroups: | comp.os.msdos.djgpp |
Subject: | Re: and another thing... |
Date: | Thu, 27 May 1999 04:23:54 GMT |
Organization: | Monash Uni |
Lines: | 61 |
Distribution: | world |
Message-ID: | <374cc852.7240794@newsserver.cc.monash.edu.au> |
References: | <Pine DOT SUN DOT 3 DOT 96 DOT 990526115225 DOT 18233A-100000 AT silver DOT cs DOT umanitoba DOT ca> |
NNTP-Posting-Host: | damcc5.halls.monash.edu.au |
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NNTP-Posting-Date: | 27 May 1999 04:23:23 GMT |
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To: | djgpp AT delorie DOT com |
DJ-Gateway: | from newsgroup comp.os.msdos.djgpp |
Reply-To: | djgpp AT delorie DOT com |
On Wed, 26 May 1999 11:56:59 -0500, Mark Phillips <umphill5 AT cs DOT umanitoba DOT ca> wrote: > [some snipped] >Creating: test.exe >Error: main.o(.data+0x0):main.cc: multiple definition of 'foo' >Error: h.o(.data+0x0):h.cc first defined here > >When I do this: [at end of response] >Shouldn't the preprocessor directives in 'header.h' handle the multiple >declaration linking errors? You need to use the 'extern' keyword for the variable ie. extern bool foo; >love >mark I'm honored. ;-) regards, Davin. > >// file #1 main.cc >#include "header.h" > >int main() >{ > fun1(); > return 0; >} > >// file #2 h.cc >#include "header.h" > >void fun1() >{ > foo = 1; >} > >// file #3 header.h >#ifndef HEADER_H >#define HEADER_H > >void fun1(); >bool foo; > >#endif > > __________________________________________________________ *** davmac - sharkin'!! davmac AT iname DOT com *** my programming page: http://yoyo.cc.monash.edu.au/~davmac/
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