Trying to build GNUstep from git repo and clang-9 on Raspbian Buster (10.4)

[Patrick Cardona]

Hi David,
Hi All,

I tried to make GNUstep from git according to the wiki :
http://wiki.gnustep.org/index.php/Building_GNUstep_under_Debian_FreeBSD

I am stuck at this step : building libobjc2.

These are the steps and things done :

Building GNUstep under Raspbian (Buster 10.4) : 

Step 1) Dependencies under Debian 10 : all done

Step 2) We install a decent clang compiler : done with clang 9, and lldb-9, 
lld-9
pi@raspberrypi:~/Fabrique/gnustep $ clang-9 --version
clang version 9.0.1-6+rpi1~bpo10+1 
Target: armv6k-unknown-linux-gnueabihf
Thread model: posix
InstalledDir: /usr/bin

Step 3) Download GNUSTEP (from git) : all done

Step 4) libiconv : passed.

Step 5) Defaults : updated due to clang-9
export CC=/usr/bin/clang-9
export CXX=/usr/bin/clang++-9
...

Step 6) libdispatch : failed / passed
pi@raspberrypi:~/Fabrique/gnustep/swift-corelibs-libdispatch/build $ cmake .. 
-DCMAKE_C_COMPILER=${CC} \
>             -DCMAKE_CXX_COMPILER=${CXX} \
>             -DCMAKE_BUILD_TYPE=Release \
>             -DUSE_GOLD_LINKER=YES
CMake Error at CMakeLists.txt:2 (cmake_minimum_required):
  CMake 3.15.1 or higher is required.  You are running version 3.13.4

Step 7) libobjc2 / gnustep-base :
Step 7-a) Blocked at building libobjc2 due to an ASM configure error :

pi@raspberrypi:~/Fabrique/gnustep/libobjc2/build $ cmake .. 
-DCMAKE_BUILD_TYPE=Release \
>             -DBUILD_STATIC_LIBOBJC=1  \
>             -DCMAKE_C_COMPILER=${CC} \
>             -DCMAKE_CXX_COMPILER=${CXX} \
>             -DCMAKE_LINKER=${LD} \
>             -DCMAKE_MODULE_LINKER_FLAGS=${LDFLAGS}
>-- The ASM compiler identification is unknown
>-- Found assembler: /usr/local/clang_9.0.0/bin/clang-9
>CMake Error at CMakeLists.txt:3 (project):
>  The CMAKE_ASM_COMPILER:
>
>    /usr/local/clang_9.0.0/bin/clang-9
>
>  is not a full path to an existing compiler tool.
>
>  Tell CMake where to find the compiler by setting either the environment
>  variable "ASM" or the CMake cache entry CMAKE_ASM_COMPILER to the full path
>  to the compiler, or to the compiler name if it is in the PATH.
>
>
>-- Warning: Did not find file Compiler/-ASM
>-- Configuring incomplete, errors occurred!
>See also "/home/pi/Fabrique/gnustep/libobjc2/build/CMakeFiles/CMakeOutput.log".
>See also "/home/pi/Fabrique/gnustep/libobjc2/build/CMakeFiles/CMakeError.log".

Well, your help will be much appreciated.

Regards,

-- 
Patrick CARDONA