For anyone wanting to write code/cross compile stuff for Nintedo Switch, DeepSeek AI just made the job about 1000 times easier. An example it gave me.
I asked it how to write a program to scan pc directories using mpt via usb from the switch to the pc. It wrote all the code and then told me how to cross compile mtp for use with libnx, here's the code it wrote for the cross compiling part:
This AI should greatly help anyone wanting to write homebrew for the switch.
I asked it how to write a program to scan pc directories using mpt via usb from the switch to the pc. It wrote all the code and then told me how to cross compile mtp for use with libnx, here's the code it wrote for the cross compiling part:
Code:
Cross-compiling libmtp to work on the Nintendo Switch with libnx is a challenging task because libmtp is not natively supported for the Switch's architecture and operating system. However, with some effort, you can attempt to port it. Below is a step-by-step guide to cross-compile libmtp for the Nintendo Switch using the libnx environment.
Prerequisites:
DevkitPro: The development environment for Nintendo Switch homebrew.
Install DevkitPro by following the official guide: DevkitPro Installation.
libmtp Source Code: Download the source code for libmtp from its official repository: libmtp GitHub.
Basic Knowledge of Cross-Compilation: Familiarity with cross-compiling libraries for ARM architectures.
Steps to Cross-Compile libmtp for Nintendo Switch:
1. Set Up the Environment
Ensure that DevkitPro is properly installed and that the environment variables are set up. Add the following to your shell configuration file (e.g., .bashrc, .zshrc):
bash
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export DEVKITPRO=/opt/devkitpro
export DEVKITARM=${DEVKITPRO}/devkitARM
export DEVKITPPC=${DEVKITPRO}/devkitPPC
export PATH=${DEVKITPRO}/tools/bin:$PATH
Reload your shell configuration:
bash
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source ~/.bashrc # or source ~/.zshrc
2. Download libmtp Source Code
Clone the libmtp repository:
bash
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git clone https://github.com/libmtp/libmtp.git
cd libmtp
3. Configure the Build for Nintendo Switch
libmtp uses the GNU Autotools build system. You need to configure it for cross-compilation targeting the Nintendo Switch.
Create a toolchain.cmake file to specify the cross-compilation toolchain:
cmake
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# toolchain.cmake
set(CMAKE_SYSTEM_NAME Generic)
set(CMAKE_SYSTEM_PROCESSOR arm)
set(CMAKE_C_COMPILER ${DEVKITPRO}/devkitA64/bin/aarch64-none-elf-gcc)
set(CMAKE_CXX_COMPILER ${DEVKITPRO}/devkitA64/bin/aarch64-none-elf-g++)
set(CMAKE_FIND_ROOT_PATH ${DEVKITPRO}/devkitA64 ${DEVKITPRO}/portlibs/switch)
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
4. Configure libmtp for Cross-Compilation
Run the following commands to configure libmtp for cross-compilation:
bash
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mkdir build
cd build
cmake -DCMAKE_TOOLCHAIN_FILE=../toolchain.cmake \
-DCMAKE_INSTALL_PREFIX=${DEVKITPRO}/portlibs/switch \
-DBUILD_SHARED_LIBS=OFF \
..
5. Build and Install libmtp
Compile and install libmtp:
bash
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make -j$(nproc)
make install
This will install libmtp into the DevkitPro portlibs directory for the Nintendo Switch.
6. Use libmtp in Your Nintendo Switch Homebrew
Once libmtp is compiled and installed, you can link it in your Nintendo Switch homebrew project. Modify your Makefile to include libmtp:
makefile
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# Makefile for Nintendo Switch homebrew using libnx and libmtp
TARGET = mtp_client
BUILD = build
SOURCES = source
INCLUDES = include
# Path to libnx and libmtp
LIBNX = $(DEVKITPRO)/libnx
LIBMTP = $(DEVKITPRO)/portlibs/switch
# Compiler flags
ARCH = -march=armv8-a -mtune=cortex-a57 -mtp=soft -fPIE
CFLAGS = -g -Wall -O2 -ffunction-sections $(ARCH) -D__SWITCH__
CXXFLAGS = $(CFLAGS) -std=gnu++17
ASFLAGS = -g $(ARCH)
LDFLAGS = -specs=$(LIBNX)/switch.specs -g $(ARCH) -Wl,-Map,$(TARGET).map
# Libraries
LIBS = -lmtp -lnx
# Source files
CFILES = $(SOURCES)/main.c
OFILES = $(CFILES:.c=.o)
# Rules
all: $(TARGET).nro
$(TARGET).nro: $(TARGET).elf
elf2nro $< $@ --icon=$(SOURCES)/icon.jpg
$(TARGET).elf: $(OFILES)
$(CC) $(LDFLAGS) $(OFILES) $(LIBS) -o $@
%.o: %.c
$(CC) $(CFLAGS) -c $< -o $@
clean:
rm -f $(OFILES) $(TARGET).elf $(TARGET).nro $(TARGET).map
7. Write Your Nintendo Switch Homebrew Program
Use the libmtp API in your Nintendo Switch homebrew program to connect to a PC via MTP and list files/directories. Refer to the libmtp documentation for API usage: libmtp Documentation.
Challenges:
USB Stack Limitations:
The Nintendo Switch's USB stack may not fully support MTP. You may need to implement custom USB communication.
Dependencies:
libmtp depends on other libraries like libusb. You may need to cross-compile and link these dependencies as well.
Testing:
Testing MTP functionality on the Switch requires a working USB connection and a PC configured for MTP.
Alternative Approach:
If cross-compiling libmtp proves too difficult, consider using a simpler protocol like FTP or SFTP for file transfer. Libraries like libcurl are easier to work with on the Switch.
Conclusion:
Cross-compiling libmtp for the Nintendo Switch is a complex but achievable task. Follow the steps above to set up the build environment, configure libmtp for cross-compilation, and integrate it into your homebrew project. Be prepared to troubleshoot issues related to USB communication and dependencies.This AI should greatly help anyone wanting to write homebrew for the switch.
Try to translate a sentence with some "bad words" and it can hallucinate very hard trying to make it accessible for 7+ 
