How do I use different C++ header files in my kernel code?

mrjbom · **Joined:** Sun Jul 21, 2019 7:34 am **Posts:** 300

Hey.
In my kernel I wanted to use some header files from C++, for example vector. C++ compiles, but the ld linker throws an error.
Compile a kernel so:

Code:

nasm -f elf32 ./source/kernel.asm -o kasm.o
g++ -m32 -std=c++11 -c ./source/kernel.cpp -o kc.o
ld -m elf_i386 -T link.ld -o kernel-0 kasm.o kc.o

Please help.

Octacone · **Joined:** Fri Aug 07, 2015 6:13 am **Posts:** 1134

You can't, remember this is your OS, there are no standard libraries, nothing.
You have to write it yourself or port a third party one, I prefer the former.

Related:
https://wiki.osdev.org/C_Library
https://wiki.osdev.org/Creating_a_C_Library
https://wiki.osdev.org/C%2B%2B#Full_C.2B.2B_Runtime_Support_Using_libgcc_And_libsupc.2B.2B
https://wiki.osdev.org/How_kernel,_compiler,_and_C_library_work_together#C_Library

GMorgan · **Joined:** Sun Jul 14, 2019 4:27 pm **Posts:** 22

If you want to use something like vector in a kernel you need to:

1. Implement paging

2. Build an allocator against your paging

3. Tie that in as a custom allocator against vector or implement your own vector class

OSDev.org

How do I use different C++ header files in my kernel code?

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