Support arm-linux build(Raspberry Pi 2)

[seanshpark]

• Change make system to support arm-linux
  • Add arm-linux build for RPi2 and fix for nuttx build #125 landed
• Prepare a simple document to setup RPi2
  • https://github.com/Samsung/iotjs/wiki/Setting-Raspberry-Pi-2-for-IoT.js
• Implement GPIO for RPi2
  • Implement GPIO class Complete GPIO module #128
  • Start of GPIO implementation based on GPIO API Start of GPIO implementation based on GPIO API #131

[seanshpark]

@ruben-ayrapetyan , I get Segmentation fault with these steps. Standalone JerryScript works ok.

• get https://github.com/seanshpark/iotjs/tree/rpi2_dev
• update jerry to latest

cd deps/jerry
git checkout master
git pull

• patch jerry jmp_buf size 12 to 14

typedef uint64_t jmp_buf[14];

• build iotjs

./tools/build.py --target-arch=arm --target-os=linux \
--no-checktest --noinit-submodule 

• copy build/arm-linux/debug/iotjs/iotjs to RPi2
• in RPi2, run iotjs with simple js file

console.log("Hello World");

• in gdb

Program received signal SIGSEGV, Segmentation fault.
0x00069370 in mem_pools_alloc() ()
(gdb) bt
#0  0x00069370 in mem_pools_alloc() ()
#1  0x0004bf0e in ecma_alloc_number() ()
#2  0x00030e88 in vm_run_from_pos(opcode_t const*, unsigned short, unsigned int, ecma_object_t*, bool, bool) ()
#3  0x00030b62 in vm_run_global() ()
#4  0x0002d814 in jerry_run ()
#5  0x0002350a in iotjs::InitJerry() () at /.../harmony/iotjs/src/iotjs.cpp:50

• JerryScript hash : 0787d76

[seanshpark]

mem_pools is 0x01 right before segment fault.

(gdb) print mem_pools
$7 = (mem_pool_state_t *) 0x1

[ruben-ayrapetyan]

@seanshpark, seems that the issue is caused by incorrect include path of libc (jerryscript-project/jerryscript#304 (comment))

[ValyrianSteel]

[ISSUE]
Could I run IoT.js in Raspberry1?
When I flash iotjs into the board, there is a problem leading the iotjs could not running:

./iotjs: /lib/arm-linux-gnueabihf/libc.so.6: version `GLIBC_2.17' not found (required by ./iotjs)

What should I do?

[seanshpark]

@growingm , thank you for the report.
GLIBC problem is related with the compiler you are using.
This problem itself can be solved by using gcc version 4.6.
But both IoT.js and JerryScript will not compile below 4.7 since it depends on compiler options.
You can try with new RASPBIAN JESSIE. I haven't tried this so not sure it will work.
(https://www.raspberrypi.org/downloads/raspbian/)

[chunseoklee]

Or you can build with static option like the following:

./tools/build.py --buildtype=release --noinit-submodule --target-arch=arm --target-os=linux --cmake-option="-DCMAKE_EXE_LINKER_FLAGS=-static"

[ValyrianSteel]

@seanshpark Thanks. I have tried this with new RASPBIAN JESSIE. GLIBC version problem is solved.
But there are new problems：
pi@raspberrypi:~$ ./iotjs
Segmentation fault

This problem can be caused by reasons that I can't figure out.

[ILyoan]

@growingm For what it's worth, try with

./tools/build.py  --target-arch=arm --cmake-option="-DCMAKE_EXE_LINK_FLAGS=-static"

I'm bot sure, but by this, the output binary will be statically linked with needed libraries, might solve the problem.

[ValyrianSteel]

@ILyoan I'm sorry for that. The Segmentation fault is still exist. Is it because the cause of the Raspberry's memory allocation mechanism is different from ubuntu14.04?

[diorahman]

@growingm you can try the prebuilt (static) iotjs from here: http://w.blankon.in/iPa

Please tell me if it works.

iotjs: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-armhf.so.3, for GNU/Linux 2.6.32, BuildID[sha1]=b4a938fc334cee01b92dd19eac40d116255815ec, not stripped

And here is the build config:

diorahman@kismis:~/src/iotjs$ sudo ./tools/build.py --buildtype=release --target-arch=arm --cmake-option="-DCMAKE_EXE_LINK_FLAGS=-static"
=======================================
 - buildtype : release
 - cmake-option : -DCMAKE_EXE_LINK_FLAGS=-static
 - tidy : True
 - make-flags : -j
 - target-os : linux
 - tuv : False
 - target-arch : arm
 - init-submodule : True
 - target-board : 
 - jerry-memstats : False
 - builddir : build
 - checktest : True
 - jerry-heaplimit : 81
 - nuttx-home : 
 - buildlib : False

[ValyrianSteel]

@diorahman It doesn't work. I have tried to run iotjs with the prebuilt iotjs, also with my own building with the build config you said.

pi@raspberrypi ~/Desktop $ file iotjs
iotjs: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-armhf.so.3, for GNU/Linux 2.6.32, BuildID[sha1]=8a64ced935a94d4b9c76b502febef564a5b39e8d, not stripped

The Segmentation Fault is still exist.

My host machine is ubuntu-14.04.2 64-bit. If it should build in 32-bit machine?

[diorahman]

What does strace tell you?