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From: kamin AT cs DOT uiuc DOT edu (Sam Kamin)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Baffling compilation errors
Date: 22 Dec 1995 18:26:54 GMT
Organization: University of Illinois, Dept of Computer Science
Lines: 38
Distribution: world
Message-ID: <4bet9e$dtu@vixen.cso.uiuc.edu>
References: <4aumi5$va AT kirin DOT wwa DOT com>
NNTP-Posting-Host: kamin.cs.uiuc.edu
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

In article <4aumi5$va AT kirin DOT wwa DOT com>, car AT wwa DOT com (Chris A. Rodgers) writes:
|> Hi, all!  I am having trouble compiling c++ source after reinstalling
|> my system.  To show the error, I chose a simple old example.
|> 
|> I have djgpp installed in e:\djgpp.  I am passing the compilation
|> parameter -lgpp, but I am getting unresolvced references of cin and
|> cout.  I am sure I am just missing something basic, but I went over
|> the steps in the faq and everything still seems to be in order, but
|> not working.  Any suggestions? (email or news is fine)
|> 
|> code:------------------------------------------
|> // myfirst.cpp--displays a message
|> #include <iostream.h>	// a PREPROCESSOR directive
|> int main(void)
|> {
|> 	cout << "Come up and C++ me some time.";
|> 	cout << "\n";
|> 	return 0;
|> }
|> 
|> compile error messages:-----------------------------
|> E:\DJGPP\SRC\cis_230\testbed1>gcc -v -lgpp myfirst.cpp -o myfirst
  ....
|> myfirst.cc(.text+0x2e): undefined reference to `cout'
|> myfirst.cc(.text+0x33): undefined reference to
|> `ostream::operator<<(char const *
|> )'
|> myfirst.cc(.text+0x40): undefined reference to `cout'
|> myfirst.cc(.text+0x45): undefined reference to
|> `ostream::operator<<(char const *
|> )'

I fixed this problem by using

          gcc ... -liostr

- Sam Kamin
  Univ. of Illinois