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From:	"Dr Jekyll" <drjekyll AT empirics DOT net>
To:	"'Cygwin List'" <cygwin AT cygwin DOT com>
Subject:	g++3.3.3 compilation problem under Cygwin
Date:	Mon, 20 Dec 2004 02:20:53 +0100
MIME-Version:	1.0
In-Reply-To:	<6.2.0.14.0.20041219144604.04a7cd78@pop.prospeed.net>
Message-Id:	<200412191921625.SM01664@xuanson>
X-IsSubscribed:	yes

Hi,
I am reading the book "Inter-process Communications in Linux", section 1.10
Process Memory Addresses and I have tried to compile the following code
under Cygwin without success (with the command):

Bash-shell>g++ -o run p1.3.cxx

Where the content of "p1.3.cxx" is given here:

/*                                                     
    Displaying process segment addresses               
 */                                                    
#include <iostream>                                    
extern int etext, edata, end;                          
using namespace std;                                   
int main( ){                                               
  cout << "Adr etext: " << hex << int(&etext) << "\t ";
  cout << "Adr edata: " << hex << int(&edata) << "\t ";
  cout << "Adr end: "   << hex << int(&end  ) << "\n"; 
  return 0;                                            
}                                             

Here is the error message

$ g++ -o p1.3 p1.3.cpp
/cygdrive/c/DOCUME~1/JK/LOCALS~1/Temp/ccnKmHpn.o(.text+0x46):p1.3.cpp:
undefined reference to `_etext'
/cygdrive/c/DOCUME~1/JK/LOCALS~1/Temp/ccnKmHpn.o(.text+0x8a):p1.3.cpp:
undefined reference to `_edata'
collect2: ld returned 1 exit status


Can someone help me?

Best regards
JK



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