The autograder of my class uses gcc to grade our projects, it only takes file uploads(.cpp .h), students can't pass in any argument flags. My project compiles with g++ with no issues:
g++ main.cpp func1.cpp func2.cpp func1.h -o a.out
but with gcc I have to add -lstdc++ at the end for it to compile:
gcc main.cpp func1.cpp func2.cpp func1.h -o a.out -lstdc++
otherwise the errors:
/usr/bin/ld: /tmp/cck9qDRT.o: in function main': main.cpp:(.text+0x60): undefined reference to std::cout' /usr/bin/ld: main.cpp:(.text+0x65): undefined reference to std::basic_ostream<char, std::char_traits >& std::operator<< std::char_traits<char >(std::basic_ostream<char, std::char_traits >&, char const*)' /usr/bin/ld: main.cpp:(.text+0x83): undefined reference to std::cin' /usr/bin/ld: main.cpp:(.text+0x88): undefined reference to std::istream::operator>>(int&)' /usr/bin/ld: main.cpp:(.text+0x96): undefined reference to std::cin' /usr/bin/ld: main.cpp:(.text+0x9b): undefined reference to std::istream::operator>>(int&)' /usr/bin/ld: main.cpp:(.text+0xb3): undefined reference to std::cout' /usr/bin/ld: main.cpp:(.text+0xb8): undefined reference to std::ostream::operator<<(int)' /usr/bin/ld: main.cpp:(.text+0xc2): undefined reference to std::basic_ostream<char, std::char_traits >& std::endl<char, std::char_traits >(std::basic_ostream<char, std::char_traits >&)' /usr/bin/ld: main.cpp:(.text+0xcd): undefined reference to std::ostream::operator<<(std::ostream& ()(std::ostream&))' /usr/bin/ld: main.cpp:(.text+0xe5): undefined reference to std::cout' /usr/bin/ld: main.cpp:(.text+0xea): undefined reference to std::ostream::operator<<(int)' /usr/bin/ld: main.cpp:(.text+0xf4): undefined reference to std::basic_ostream<char, std::char_traits >& std::endl<char, std::char_traits >(std::basic_ostream<char, std::char_traits >&)' /usr/bin/ld: main.cpp:(.text+0xff): undefined reference to std::ostream::operator<<(std::ostream& ()(std::ostream&))' /usr/bin/ld: /tmp/cck9qDRT.o: in function __static_initialization_and_destruction_0(int, int)': main.cpp:(.text+0x147): undefined reference to std::ios_base::Init::Init()' /usr/bin/ld: main.cpp:(.text+0x15c): undefined reference to std::ios_base::Init::~Init()' /usr/bin/ld: /tmp/ccTpZnaT.o: in function fib1()': func1.cpp:(.text+0x31): undefined reference to std::cout' /usr/bin/ld: func1.cpp:(.text+0x36): undefined reference to std::basic_ostream<char, std::char_traits >& std::operator<< std::char_traits<char >(std::basic_ostream<char, std::char_traits >&, char const*)' /usr/bin/ld: func1.cpp:(.text+0x40): undefined reference to std::basic_ostream<char, std::char_traits >& std::endl<char, std::char_traits >(std::basic_ostream<char, std::char_traits >&)' /usr/bin/ld: func1.cpp:(.text+0x4b): undefined reference to std::ostream::operator<<(std::ostream& ()(std::ostream&))' /usr/bin/ld: /tmp/ccTpZnaT.o: in function __static_initialization_and_destruction_0(int, int)': func1.cpp:(.text+0x85): undefined reference to std::ios_base::Init::Init()' /usr/bin/ld: func1.cpp:(.text+0x9a): undefined reference to std::ios_base::Init::~Init()' /usr/bin/ld: /tmp/cc2MzCjT.o: in function fib2()': func2.cpp:(.text+0x23): undefined reference to std::cout' /usr/bin/ld: func2.cpp:(.text+0x28): undefined reference to std::basic_ostream<char, std::char_traits >& std::operator<< std::char_traits<char >(std::basic_ostream<char, std::char_traits >&, char const)' /usr/bin/ld: /tmp/cc2MzCjT.o: in function __static_initialization_and_destruction_0(int, int)': func2.cpp:(.text+0x62): undefined reference to std::ios_base::Init::Init()' /usr/bin/ld: func2.cpp:(.text+0x77): undefined reference to std::ios_base::Init::~Init()' collect2: error: ld returned 1 exit status
How do I compile using gcc without needing the -lstdc++? Does manually including all the standard libraries used on the project in code fix it?
