Build Jerryscript for LLVM

[ssultana]

Hi,
I want to build Jerryscript for LLVM in Contiki/Galileo board. Can you please point me to what Makefile/compiler options I should change? Previously I built Jerryscript for Contiki OS/Galileo board. Basically, I made a directory jerryscript/targets/contiki-x86, wrote a Makefile jerryscript/targets/contiki-x86/Makefile.contikix86 for Contiki/Galileo board and set the appropriate toolchain.

To build in LLVM, I've so far tried the following changes but haven't been successful to build JerryScript.

1. Updated PATH variable with llvm/build/bin path and Modified compiler options in Makefile.contikix86 as

   jerry:
       ... ... 
    -DCMAKE_TOOLCHAIN_FILE=build/configs/toolchain_external_clang.cmake \
    -DEXTERNAL_LIBC_INTERFACE=$(CONTIKI)/platform/galileo/bsp/libc/i586-elf/include \
    -DEXTERNAL_CMAKE_SYSTEM_PROCESSOR=x86 \
    -DEXTERNAL_CMAKE_C_COMPILER=clang \
    -DEXTERNAL_CMAKE_CXX_COMPILER=clang++ \
    -DEXTERNAL_COMPILE_FLAGS="$(EXT_CFLAGS) $(CFLAGS)"
   

2. Wrote build/configs/toolchain_external_clang.cmake as

     ... ... 
     CMAKE_FORCE_C_COMPILER(${EXTERNAL_CMAKE_C_COMPILER} Clang)
     CMAKE_FORCE_CXX_COMPILER(${EXTERNAL_CMAKE_CXX_COMPILER} Clang)
   

3. Changed Imported Library Options in JerryScript/CMakeLists.txt as

elseif("${CMAKE_C_COMPILER_ID}" STREQUAL "Clang")
  add_library(${PREFIX_IMPORTED_LIB}libclang STATIC IMPORTED)
  execute_process(COMMAND ${CMAKE_C_COMPILER} ${FLAGS_COMMON_ARCH} -print-file-name=
                  OUTPUT_VARIABLE IMPORTED_LIBCLANG_RT_LOCATION
                  OUTPUT_STRIP_TRAILING_WHITESPACE)
  set(IMPORTED_LIBCLANG_RT_LOCATION "/home/llvm-git/build/lib/libclang.so")
  set_property(TARGET ${PREFIX_IMPORTED_LIB}libclang
               PROPERTY IMPORTED_LOCATION ${IMPORTED_LIBCLANG_RT_LOCATION})

@seanshpark

[seanshpark]

@ssultana , Hello,
I've not much experience with LLVM Clang, but it seems that some compile options are different. With your comment above I don't see any problem. If possible, can you post compile or link errors here?
May be you already have tried like this (http://stackoverflow.com/questions/7031126/switching-between-gcc-and-clang-llvm-using-cmake) page...

[tilmannOSG]

Please have a look at #1192, with the the new build system it is very easy to build with Clang.

[ssultana]

Thanks @tilmannOSG . I'll check that.