How to create a static library on nRF Connect SDK/Zephyr

[akif]

Hi,

I am using nrF52840 with nRF Connect, Visual Code Studio (Zephyr) 

Is there any guide or a tutorial with an example that shows how to create a static library on nRF Connect SDK/Zephyr?

There are some topics opened related to this, but none of them have the complete solution.

Please if you can explain in detail, it would help everyone a lot. Thanks

[akif]

Thank you for help. Now it builds with bash terminal but still I get build error on VS Code.

I restarted the PC and I assumed VS Code doesn't see the PATH so, I changed VS Code Preferences> Settings> Features>Terminal>Default Profile Windows to PowerShell(tried Command Prompt and nRF Connect from dropdown menu as well), but still I couldn't build on VS Code.

What I should do to build on VS Code?

Thank you for asking, my intentions are creating a static library in a project and later using this static library in another project.

Thanks

[Håkon Alseth]

Hi,

 

The problem is that the makefile includes unix specific commands. Here's a pull-request to zephyr which should fix this in the future:

https://github.com/zephyrproject-rtos/zephyr/pull/51292

 

You can apply this manually if you'd like, or build the project via bash on windows.

 

Kind regards,

Håkon

[akif]

Thank youHåkon Alseth  I will continue with bash until your last solution is released.

I have a related question. Current example only one .c and .h file. I want to create only one .a file. with multiple .c and .h files.

Can you help on this?

I made these changes on file but it didn't work.

PREFIX ?= .
OBJ_DIR ?= $(PREFIX)/obj
LIB_DIR ?= $(PREFIX)/lib

all:
	mkdir -p $(OBJ_DIR) $(LIB_DIR)
	$(CC) -c $(CFLAGS) -MD -Iinclude src/mylib.c src/mylib_led.c -o $(OBJ_DIR)/mylib.o $(OBJ_DIR)/mylib_led.o
	$(AR) -rcs $(LIB_DIR)/libmylib.a $(OBJ_DIR)/mylib.o $(OBJ_DIR)/mylib_led.o

clean:
	rm -rf $(OBJ_DIR) $(LIB_DIR)

[Håkon Alseth]

Hi,

 

If you search for "makefile static library", you'll get dedicated threads on this specific matter, like this one:

https://stackoverflow.com/questions/31421616/c-creating-static-library-and-linking-using-a-makefile

 

Kind regards,

Håkon