g++ won't compile 'hello world'

g++ won't compile 'hello world'

[Gerrit P. Haase]

Hallo cygwin,

$ g++ --version
g++ (GCC) 3.1.1 20020718 (prerelease)

$ g++ -c g++_test.C

$ g++ -o g++_test g++_test.o
g++_test.o(.text+0x39):g++_test.C: undefined reference to `std::cout'
g++_test.o(.text+0x46):g++_test.C: undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)'
g++_test.o(.text+0x6f):g++_test.C: undefined reference to `std::ios_base::Init::Init[in-charge]()'
g++_test.o(.text+0x8a):g++_test.C: undefined reference to `std::ios_base::Init::~Init [in-charge]()'
g++_test.o(.eh_frame+0x11):g++_test.C: undefined reference to `___gxx_personality_v0'
collect2: ld returned 1 exit status
  
g++_test.C:
===========
#include<iostream>
using namespace std;
int
main ()
{
  cout << "what am I doing wrong?";
  return 0;
}


Gerrit
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Re: g++ won't compile 'hello world'

[Gerrit P. Haase]

Hallo Keen,

Am Mittwoch, 21. August 2002 um 16:35 schriebst du:

> (home built) of gcc and in the link process, its was looking for things like
> libraries in the wrong

[hello world doesn't compile]

Pilot error, sorry.  Had a testversion of libstdc++ lying around
at the wrong place...


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Re: g++ won't compile 'hello world'

[Keen Wayne A Contr AFRL/MNGG]

I have had what may be similar problems in the past, when I was compiling
with a new release
(home built) of gcc and in the link process, its was looking for things like
libraries in the wrong
place.  In that case, I forced it to grab the right stuff by my compile
command, i.e.

ng++ -o hello hello.cpp -L/mygcc/lib

Now, I just checked my current version  of Cygwin, which has for gcc:

gcc -v
Reading specs from /bin/../lib/gcc-lib/i686-pc-cygwin/3.1.1/specs
Configured with: /netrel/src/gcc-3.1.1-4/configure
--enable-languages=c,c++,f77,java --enable-libgcj --enable-threads=posix
--with-system-zlib --enable-nls --without-included-gettext
--enable-interpreter --disable-sjlj-exceptions
--disable-version-specific-runtime-libs --enable-shared
--build=i686-pc-linux --host=i686-pc-cygwin --target=i686-pc-cygwin
--enable-haifa --prefix=/usr --exec-prefix=/usr --sysconfdir=/etc
--libdir=/usr/lib --includedir=/nonexistent/include --libexecdir=/usr/sbin
Thread model: posix
gcc version 3.1.1 20020718 (prerelease)

And it compiled fine.  Have you done anything to override where gcc should
look for its libraries.  Have you perhaps had setup
overwrite some of the 3.1.1 stuff with 2.95 stuff.....I am guessing
here...I'll just shutup now.

Wayne Keen

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