Mail Archives: cygwin/2010/07/04/07:09:05
On 2010-07-04 12:27 PM, kenny AT ca wrote:
> Forgot to attach error information.
>
> hello.o:hello.cpp:(.text+0xd): undefined reference to
> `std::basic_string<char, std::char_traits<char>, std::allocator<char>
>
>> ::size() const'
>>
> hello.o:hello.cpp:(.text+0x60): undefined reference to
> `std::basic_string<char, std::char_traits<char>, std::allocator<char>
>
>> ::operator[](unsigned int) const'
>>
> hello.o:hello.cpp:(.text+0x9f): undefined reference to
> `std::basic_string<char, std::char_traits<char>, std::allocator<char>
>
>> ::operator[](unsigned int) const'
>>
> hello.o:hello.cpp:(.text+0xce): undefined reference to
> `std::basic_string<char, std::char_traits<char>, std::allocator<char>
>
>> ::operator[](unsigned int) const'
>>
> hello.o:hello.cpp:(.text+0x111): undefined reference to `std::cout'
> hello.o:hello.cpp:(.text+0x116): 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*)'
>>
> hello.o:hello.cpp:(.text+0x11e): undefined reference to
> `std::basic_ostream<char, std::char_traits<char> >& std::endl<char,
> std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char>
>
>> &)'
>>
> hello.o:hello.cpp:(.text+0x126): undefined reference to
> `std::basic_ostream<char, std::char_traits<char>
>
>> ::operator<<(std::basic_ostream<char, std::char_traits<char> >&
>>
> (*)(std::basic_ostream<char, std::char_traits<char> >&))'
> hello.o:hello.cpp:(.text+0x149): undefined reference to
> `std::ios_base::Init::Init()'
> hello.o:hello.cpp:(.text+0x164): undefined reference to
> `std::ios_base::Init::~Init()'
> collect2: ld returned 1 exit status
>
>
> kenny AT ca wrote:
>
>> Hi there,
>>
>> I wrote a file, hello.c. It has only one function: print a message like
>> "hello!".
>> ##### hello.c #########
>> #include<stdio.h>
>> void hello() { printf( "Hello.\n" ) ; }
>>
>> $gcc -c hello.c
>> $gcc -shared -o hello.dll hello.o
>>
>> I successufully built it as DLL, hello.dll.
>>
>> Then, I rewrote it in c++.
>> ##### hello.cpp #######
>> #include<iostream>
>> using namespace std ;
>> void hello() {cout<< "Hello."<< endl ;}
>>
>> Then, I used the commands above to built DLL, but it failed. Why did it
>> fail?
>>
>>
>>
>
Use g++ to compile and link c++ code
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