Error compiling on native linux#19

This error starts in file.cc and is in the filesystem code, also it is in the Process code. ~~~~ ld -melf_i386 -static -L ./ -T ./arch/x86/linker.ld -o kernel.elf arch/x86/start.o runtime/cxx.o runtime/itoa.o runtime/buffer.o runtime/memory.o runtime/string.o core/class.o core/elf_loader.o core/file.o core/filesystem.o core/kernel.o core/api_posix.o core/process.o core/syscalls.o core/device.o core/system.o core/env.o core/user.o core/modulelink.o core/socket.o modules/module.o modules/null.o modules/stdtty.o modules/x86serial.o modules/ide.o modules/bochsvbe.o modules/ext2.o modules/dospartition.o modules/clock_x86.o modules/keys.o arch/x86/alloc.o arch/x86/architecture.o arch/x86/io.o arch/x86/vmm.o arch/x86/x86.o arch/x86/switch.o arch/x86/x86int.o core/file.o: In function `File::~File()': /home/majicktek/Downloads/devos-master/kernel/core/file.cc:73: undefined reference to `operator delete(void*, unsigned int)' core/file.o: In function `File::remove()': /home/majicktek/Downloads/devos-master/kernel/core/file.cc:223: undefined reference to `operator delete(void*, unsigned int)' core/filesystem.o: In function `Filesystem::~Filesystem()': /home/majicktek/Downloads/devos-master/kernel/core/filesystem.cc:26: undefined reference to `operator delete(void*, unsigned int)' core/process.o: In function `Process::~Process()': /home/majicktek/Downloads/devos-master/kernel/core/process.cc:12: undefined reference to `operator delete(void*, unsigned int)' core/process.o: In function `Process::remove()': /home/majicktek/Downloads/devos-master/kernel/core/process.cc:106: undefined reference to `operator delete(void*, unsigned int)' core/device.o:/home/majicktek/Downloads/devos-master/kernel/core/device.cc:36: more undefined references to `operator delete(void*, unsigned int)' follow Makefile:21: recipe for target 'kernel.elf' failed make[1]: *** [kernel.elf] Error 1 make[1]: Leaving directory '/home/majicktek/Downloads/devos-master/kernel' Makefile:13: recipe for target 'all' failed ~~~~