Multiple definition Error

[CarlyAmar]

My code is set up as follows:

main.h

#include "helper.h"

helper.h

#include "subprocess.hpp"

helper.cpp

#include "helper.h"

Error:

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Because of this, I get:

main.cpp.o: In function std::iterator_traits<unsigned char const*>::iterator_category std::__iterator_category<unsigned char const*>(unsigned char const* const&)': subprocess.hpp:152: multiple definition of subprocess::util::quote_argument(std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> > const&, std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> >&, bool)'
main.cpp.o:/subprocess.hpp:152: first defined here
helper.cpp.o: In function std::vector<char*, std::allocator<char*> >::reserve(unsigned int)': /subprocess.hpp:152: multiple definition of subprocess::util::quote_argument(std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> > const&, std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> >&, bool)'
main.cpp.o:/subprocess.hpp:152: first defined here
collect2: error: ld returned 1 exit status

Solution

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This is easily solved by changing void quote_argument(const std::wstring &argument, std::wstring &command_line, bool force) to inline void quote_argument(const std::wstring &argument, std::wstring &command_line, bool force)

* Filenames changed for privacy.