Clion SDCC Compiler STM8 Cmakelists.txt: Error 119 don't know what to do with file 'testCCompiler.c.obj'. file extension unsupported

Getting error with SDCC .obj file extension not supported.

error 119: don't know what to do with file 'CMakeFiles/cmTC_723dd.dir/testCCompiler.c.obj'. file extension unsupported

CMAKE options:

-D CMAKE_SYSTEM_NAME="Generic" -D CMAKE_C_COMPILER_ID="SDCC"  -D CMAKE_C_COMPILER="sdcc"

Build options:

-mstm8

"C:\Program Files\JetBrains\CLion2018\bin\cmake\win\bin\cmake.exe" -DCMAKE_BUILD_TYPE=Debug "-DCMAKE_C_COMPILER=C:/Program Files/SDCC/bin/sdcc.exe" -G "CodeBlocks - MinGW Makefiles" C:\Users\a\CLionProjects\untitled2
-- The C compiler identification is SDCC
-- Check for working C compiler: C:/Program Files/SDCC/bin/sdcc.exe
-- Check for working C compiler: C:/Program Files/SDCC/bin/sdcc.exe -- broken
CMake Error at C:/Program Files/JetBrains/CLion2018/bin/cmake/win/share/cmake-3.12/Modules/CMakeTestCCompiler.cmake:52 (message):
The C compiler

"C:/Program Files/SDCC/bin/sdcc.exe"

is not able to compile a simple test program.

It fails with the following output:

Change Dir: C:/Users/a/CLionProjects/untitled2/cmake-build-debug/CMakeFiles/CMakeTmp

Run Build Command:"C:/msys32/mingw64/bin/mingw32-make.exe" "cmTC_723dd/fast"
C:/msys32/mingw64/bin/mingw32-make.exe -f CMakeFiles\cmTC_723dd.dir\build.make CMakeFiles/cmTC_723dd.dir/build
mingw32-make.exe[1]: Entering directory 'C:/Users/a/CLionProjects/untitled2/cmake-build-debug/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_723dd.dir/testCCompiler.c.obj
C:\PROGRA~1\SDCC\bin\sdcc.exe -o CMakeFiles\cmTC_723dd.dir\testCCompiler.c.obj -c C:\Users\a\CLionProjects\untitled2\cmake-build-debug\CMakeFiles\CMakeTmp\testCCompiler.c
Linking C executable cmTC_723dd.exe
"C:\Program Files\JetBrains\CLion2018\bin\cmake\win\bin\cmake.exe" -E cmake_link_script CMakeFiles\cmTC_723dd.dir\link.txt --verbose=1
C:\PROGRA~1\SDCC\bin\sdcc.exe CMakeFiles/cmTC_723dd.dir/testCCompiler.c.obj -o cmTC_723dd.exe
at 1: error 119: don't know what to do with file 'CMakeFiles/cmTC_723dd.dir/testCCompiler.c.obj'. file extension unsupported
SDCC : mcs51/z80/z180/r2k/r3ka/gbz80/tlcs90/ds390/pic16/pic14/TININative/ds400/hc08/s08/stm8 3.8.0 #10562 (MINGW64)
published under GNU General Public License (GPL)
Usage : sdcc [options] filename

main.c:

#include <stdio.h>

int main() {
    printf("Hello, World!\n");
    return 0;
}

cmakelists.txt:

cmake_minimum_required(VERSION 3.5.0)
project(stm8 C)

set(CMAKE_C_FLAGS "-mstm8 -lstm8 --opt-code-size")
set(CMAKE_EXE_LINKER_FLAGS "")

add_definitions(-DSKIP_TRAPS=1)
add_definitions(-DSTM8S103)
add_definitions(-D__SDCC__)

# User program
include_directories(User)
file(GLOB_RECURSE USER_SOURCES "C:/Users/a/CLionProjects/untitled2/*.c")

# Library
set(SPL_PATH "C:/Program Files/SDCC/")
set(SPLC "${SPL_PATH}/lib/src")
include_directories("${SPL_PATH}/include")

# System
link_directories("C:/Program Files/SDCC/include")

set(SPL_SOURCES "${SPLC}/stm8s_gpio.c")

Clion 2018 Windows8