c++ - CppDB编译错误

Question

我遵循以下步骤来构建CppDB:

svn co http://cppcms.svn.sourceforge.net/svnroot/cppcms/cppdb/trunk cppdb-trunk
cd cppdb-trunk
cmake ~/Desktop/cppdb-trunk
make
make install

然后，我尝试从examples目录编译并运行文件example1.cpp。

当我运行 gcc example1.cpp时，出现以下错误:

/tmp/ccGWenrv.o: In function main':
example1.cpp:(.text+0x2a): undefined reference tostd::allocator::allocator()' example1.cpp:(.text+0x42): undefined reference to std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> const&)'
example1.cpp:(.text+0x58): undefined reference tocppdb::session::session(std::__cxx11::basic_string, std::allocator > const&)' example1.cpp:(.text+0x64): undefined reference to std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string()'
example1.cpp:(.text+0x73): undefined reference tostd::allocator::~allocator()' example1.cpp:(.text+0x91): undefined reference to cppdb::session::operator<<(char const*)'
example1.cpp:(.text+0xa5): undefined reference tocppdb::statement::operator<<(void ()(cppdb::statement&))' example1.cpp:(.text+0xb4): undefined reference to cppdb::statement::~statement()'
example1.cpp:(.text+0xd2): undefined reference tocppdb::session::operator<<(char const)' example1.cpp:(.text+0xe6): undefined reference to cppdb::statement::operator<<(void (*)(cppdb::statement&))'
example1.cpp:(.text+0xf5): undefined reference tocppdb::statement::~statement()' example1.cpp:(.text+0x170): undefined reference to cppdb::statement::statement()'
example1.cpp:(.text+0x18e): undefined reference tocppdb::session::operator<<(char const*)' example1.cpp:(.text+0x1db): undefined reference to cppdb::statement::operator<<(tm const&)'
example1.cpp:(.text+0x1e8): undefined reference tocppdb::statement::operator<<(char const*)' example1.cpp:(.text+0x1fd): undefined reference to `cppdb::statement::operator=(cppdb::statement const&)'

等等

有什么建议么？

Answer 1

尝试g++ example1.cpp -lcppdb。您需要链接到C++运行时库(使用g++代替gcc来解决)和CppDB自身(链接-lcppdb部分)。如果GCC找不到-lcppdb库，则必须使用-L提供路径，并且可能还必须在运行时使用LD_LIBRARY_PATH。