Compiling lvgl to bootable kernel (on macOS)

[naturalmechanics]

I need to compile Circle with LVGL in a bootable mode for rpi.

Everything is good, I can compile, the samples. They produce kernel.d and kernel7l.img (i can use the later to boot an RPi cm4)

But, I need to run LVGL, i followed the instructions in addon/lvgl/sample/readme.

Ialso looked at this: #552

However, the compilation does not produce any error - but only produces a kernel.d, and a main.d

I need to produce kernel7l.img. How can I do that? Thank you.

[rsta2]

On which OS do you try to build the LVGL sample? Have you updated the LVGL submodule using: git submodule update --init addon/lvgl/lvgl/

[naturalmechanics]

Hi

1. The host OS is Mac OS 11
2. yes, I have done that git submodule update --init addon/lvgl/lvgl/ - but this did not produce any output at all (neither success, nor error)

[rsta2]

Unfortunately I do not have a Mac and that's why building on it is not fully supported. I cannot test it. We can try to get the LVGL build working anyway. Have you tried the version with the Makefile on the develop branch as noted in issue #552? There was recently a problem with building on Windows and this version fixes it. Perhaps this also helps on MacOS? If not, I will send you a special Makefile with a workaround.

[naturalmechanics]

Yes.

I dont need the DEFINE += -DARM_ALLOW_MULTI_CORE - I am just trying to build the LVGL sample

I also tried with LVGL downloaded from their github

But i was unsuccessful. My goal is to have a bootable kernel where i can run LVGL on baremetal

[rsta2]

OK. Please replace addon/lvgl/Makefile with the file in the attached .zip archive and rebuild addon/lvgl/ and, if this works, addon/lvgl/sample/. I guess, there is a problem with the $(shell) operator in MacOS's make tool. So I copied its output directly into the Makefile.

Makefile.zip

[naturalmechanics]

I just tested it. there is still no *img file in the sample folder.

My workflow was:

1. git clone --recursive https://github.com/rsta2/circle.git (get everything, incl lvgl)
2. cd circle
3. git submodule update --init addon/lvgl/lvgl/ (no effect)
4. ./makeall
5. cd addon/lvgl
6. replace makefile
7. make -> onl yproduces lvgl.d
8. cd sample
9. make
10. only produce kernel.d and main.d

[naturalmechanics]

I teseted with some debugs

OBJS = lvgl.o $(CSRCS:.c=.o)

debug_targ_0:
        @echo "Objects ready"

EXTRACLEAN += $(CSRCS:.c=.o) $(CSRCS:.c=.d)

debug_targ_1:
        @echo "did extraclean work?"
        
liblvgl.a: $(OBJS)
        @echo "  AR    $@"
        @rm -f $@
        @$(AR) cr $@ $(OBJS)
        
debug_targ_2:
        @echo "liblvgl ok"
        @echo  $(CIRCLEHOME)/Rules.mk

Only the first debug message is being printed, EXTRACLEAN doesn't fire

[naturalmechanics]

and if I do:

liblvgl.a:
               $(OBJS) # note: new line
               # turn off the echo
# continue the rest

I get: make: lvgl.o: No such file or directory

[rsta2]

Thanks for testing! Attached there is another .zip archive, with a Makefile to be replaced in addon/lvgl/. Please clean everything with make clean before trying to build.

Makefile.zip

[naturalmechanics]

Hi thank you for the other makefile
Immediate collision:

  CPP   lvgl.o
In file included from ../../addon/lvgl/lvgl/src/lv_conf_internal.h:60,
                 from ../../addon/lvgl/lvgl/src/lv_init.h:16,
                 from ../../addon/lvgl/lvgl/lvgl.h:21,
                 from ../../addon/lvgl/lvgl.h:25,
                 from lvgl.cpp:20:
../../addon/lvgl/lvgl/src/../../lv_conf.h:62:33: fatal error: inttypes.h: No such file or directory
   62 | #define LV_INTTYPES_INCLUDE     <inttypes.h>
      |                   

However, I have it here:

/System/Volumes/Data/Users/username_here/circle-dev/circle-3/circle/addon/lvgl/lvgl/src/libs/thorvg/rapidjson/msinttypes/inttypes.h

If i directly edit the lv_config.h with the full file path, then I get additional errors

/System/Volumes/Data/Users/username_here/circle-dev/circle-3/circle/addon/lvgl/lvgl/src/libs/thorvg/rapidjson/msinttypes/stdint.h:98:12: fatal error: wchar.h: No such file or directory
   98 | #  include <wchar.h>

Correcting that, continues with other errors (another file not found ..)

[rsta2]

The Makefile workaround seems to work. Now we have a toolchain problem. The file inttypes.h must be provided by the toolchain. The file, which you have found in LVGL is for an external library, which is not used in Circle.

Which toolchain are you using? The recommended toolchain for Circle can be downloaded here. Please skip the version on top, go down to version 13.2.Rel1 and download the bare-metal target version (arm-none-eabi), which fits for your Mac (x86_64 or Apple silicon). Please try to build Circle and the LVGL library with this toolchain.

[naturalmechanics]

still same problem.
i have reinstalled the thing : https://developer.arm.com/-/media/Files/downloads/gnu/13.2.rel1/binrel/arm-gnu-toolchain-13.2.rel1-darwin-arm64-arm-none-eabi.pkg

[naturalmechanics]

I have changed your makefile like this:

CIRCLEHOME = ../..

LVGL_PATH = ./lvgl

INCLUDE += -I/Library/Developer/CommandLineTools/usr/lib/clang/16/include
# that is the correct location, I have checked with find command

OBJS =	lvgl.o \
	lvgl/src/draw/lv_draw_mask.o \

Now I have:

/Library/Developer/CommandLineTools/usr/lib/clang/16/include/__stddef_ptrdiff_t.h:15:50: error: missing binary operator before token "("
   15 |     (__has_feature(modules) && !__building_module(_Builtin_stddef))
      |                                                  ^
In file included from /Library/Developer/CommandLineTools/usr/lib/clang/16/include/stddef.h:87:
/Library/Developer/CommandLineTools/usr/lib/clang/16/include/__stddef_size_t.h:15:50: error: missing binary operator before token "("
   15 |     (__has_feature(modules) && !__building_module(_Builtin_stddef))
      |                                                  ^
In file included from /Library/Developer/CommandLineTools/usr/lib/clang/16/include/stddef.h:102:
/Library/Developer/CommandLineTools/usr/lib/clang/16/include/__stddef_null.h:10:41: error: missing binary operator before token "("
   10 | #if !defined(NULL) || !__building_module(_Builtin_stddef)
      |                                         ^
In file included from /Library/Developer/CommandLineTools/usr/lib/clang/16/include/stddef.h:107:
/Library/Developer/CommandLineTools/usr/lib/clang/16/include/__stddef_nullptr_t.h:15:50: error: missing binary operator before token "("
   15 |     (__has_feature(modules) && !__building_module(_Builtin_stddef))
      |                                                  ^
In file included from /Library/Developer/CommandLineTools/usr/lib/clang/16/include/stddef.h:122:
/Library/Developer/CommandLineTools/usr/lib/clang/16/include/__stddef_offsetof.h:15:50: error: missing binary operator before token "("
   15 |     (__has_feature(modules) && !__building_module(_Builtin_stddef))
      |                                                  ^
In file included from ../../addon/lvgl/lvgl/src/misc/lv_types.h:22:
/Library/Developer/CommandLineTools/usr/lib/clang/16/include/inttypes.h:21:15: fatal error: inttypes.h: No such file or directory
   21 | #include_next <inttypes.h>
      |               ^~~~~~~~~~~~
compilation terminated.

[naturalmechanics]

and if i do this:

CXX = arm-none-eabi-g++ # Add this for C++ compiler
CFLAGS = -Wall -O2 "-D__building_module(_Builtin_stddef)=0"


#INCLUDE += -I/Library/Developer/CommandLineTools/usr/lib/clang/16/include
INCLUDE += -I/Library/Developer/CommandLineTools/usr/lib/clang/16/include -I../../include -I$(LVGL_PATH)

I get:

inttypes.h: No such file or directory
   21 | #include_next <inttypes.h>
      |               ^~~~~~~~~~~~

Now, I can locate inttypes.h, but the error is in the include_next

[naturalmechanics]

Finally I have changed the includefile path

This is my makefile now:

CXX = arm-none-eabi-g++ # Add this for C++ compiler
INCLUDE += -I/Applications/ArmGNUToolchain/13.2.Rel1/arm-none-eabi/arm-none-eabi/include/ -I../../include -I$(LVGL_PATH)
# the correct toolchain

Now i have:

../../include/circle/types.h:62:15: error: expected constructor, destructor, or type conversion before '(' token
   62 | ASSERT_STATIC (sizeof (boolean) == 1);
      |               ^
In file included from ../../include/circle/memory.h:29,
                 from ../../include/circle/new.h:23,
                 from lvgl.cpp:27:
../../include/circle/heapallocator.h:32:15: error: expected constructor, destructor, or type conversion before '(' token
   32 | ASSERT_STATIC (DATA_CACHE_LINE_LENGTH_MAX >= 16);