Cmake cross-compiling error (missing -lm -lc and crt0.o) - c++

Question

I wrote a simple helloworld program in C++ (main.cpp, print.cpp, print.h) and I wanted to cross compile it to ARM using CMake. But I got an error about missing files. Below is the output of make:
/usr/bin/cmake -H/home/eslam/eslamlearning/learning/CPPtest -B/home/eslam/eslamlearning/learning/CPPtest --check-build-system CMakeFiles/Makefile.cmake 0
/usr/bin/cmake -E cmake_progress_start /home/eslam/eslamlearning/learning/CPPtest/CMakeFiles /home/eslam/eslamlearning/learning/CPPtest/CMakeFiles/progress.marks
make -f CMakeFiles/Makefile2 all
make[1]: Entering directory '/home/eslam/eslamlearning/learning/CPPtest'
make -f CMakeFiles/LibsModule.dir/build.make CMakeFiles/LibsModule.dir/depend
make[2]: Entering directory '/home/eslam/eslamlearning/learning/CPPtest'
cd /home/eslam/eslamlearning/learning/CPPtest && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/eslam/eslamlearning/learning/CPPtest /home/eslam/eslamlearning/learning/CPPtest /home/eslam/eslamlearning/learning/CPPtest /home/eslam/eslamlearning/learning/CPPtest /home/eslam/eslamlearning/learning/CPPtest/CMakeFiles/LibsModule.dir/DependInfo.cmake --color=
make[2]: Leaving directory '/home/eslam/eslamlearning/learning/CPPtest'
make -f CMakeFiles/LibsModule.dir/build.make CMakeFiles/LibsModule.dir/build
make[2]: Entering directory '/home/eslam/eslamlearning/learning/CPPtest'
[ 25%] Linking CXX static library libLibsModule.a
/usr/bin/cmake -P CMakeFiles/LibsModule.dir/cmake_clean_target.cmake
/usr/bin/cmake -E cmake_link_script CMakeFiles/LibsModule.dir/link.txt --verbose=1
/home/eslam/eslamlearning/gcc-arm-eabi-toolchains/bin/arm-eabi-ar qc libLibsModule.a CMakeFiles/LibsModule.dir/print.cpp.o
/usr/bin/ranlib libLibsModule.a
make[2]: Leaving directory '/home/eslam/eslamlearning/learning/CPPtest'
[ 50%] Built target LibsModule
make -f CMakeFiles/StaticTest.dir/build.make CMakeFiles/StaticTest.dir/depend
make[2]: Entering directory '/home/eslam/eslamlearning/learning/CPPtest'
cd /home/eslam/eslamlearning/learning/CPPtest && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/eslam/eslamlearning/learning/CPPtest /home/eslam/eslamlearning/learning/CPPtest /home/eslam/eslamlearning/learning/CPPtest /home/eslam/eslamlearning/learning/CPPtest /home/eslam/eslamlearning/learning/CPPtest/CMakeFiles/StaticTest.dir/DependInfo.cmake --color=
make[2]: Leaving directory '/home/eslam/eslamlearning/learning/CPPtest'
make -f CMakeFiles/StaticTest.dir/build.make CMakeFiles/StaticTest.dir/build
make[2]: Entering directory '/home/eslam/eslamlearning/learning/CPPtest'
[ 75%] Linking CXX executable StaticTest
/usr/bin/cmake -E cmake_link_script CMakeFiles/StaticTest.dir/link.txt --verbose=1
/home/eslam/eslamlearning/gcc-arm-eabi-toolchains/bin/arm-eabi-g++ --sysroot=/home/eslam/ CMakeFiles/StaticTest.dir/main.cpp.o -o StaticTest libLibsModule.a
/home/eslam/eslamlearning/gcc-arm-eabi-toolchains/bin/../lib/gcc/arm-eabi/7.3.1/../../../../arm-eabi/bin/ld: cannot find crt0.o: No such file or directory
/home/eslam/eslamlearning/gcc-arm-eabi-toolchains/bin/../lib/gcc/arm-eabi/7.3.1/../../../../arm-eabi/bin/ld: cannot find -lm
/home/eslam/eslamlearning/gcc-arm-eabi-toolchains/bin/../lib/gcc/arm-eabi/7.3.1/../../../../arm-eabi/bin/ld: cannot find -lc
collect2: error: ld returned 1 exit status
CMakeFiles/StaticTest.dir/build.make:98: recipe for target 'StaticTest' failed
make[2]: *** [StaticTest] Error 1
make[2]: Leaving directory '/home/eslam/eslamlearning/learning/CPPtest'
CMakeFiles/Makefile2:107: recipe for target 'CMakeFiles/StaticTest.dir/all' failed
make[1]: *** [CMakeFiles/StaticTest.dir/all] Error 2
make[1]: Leaving directory '/home/eslam/eslamlearning/learning/CPPtest'
Makefile:86: recipe for target 'all' failed
make: *** [all] Error 2
Here is my CMakelists.txt
cmake_minimum_required(VERSION 3.10.2)
project (StaticTest)
enable_language(CXX)
SET(CMAKE_SYSTEM_NAME Generic)
set(CMAKE_SYSTEM_PROCESSOR arm)
SET(CMAKE_C_COMPILER /home/eslam/eslamlearning/gcc-arm-eabi-toolchains/bin/arm-eabi-gcc)
SET(CMAKE_CXX_COMPILER /home/eslam/eslamlearning/gcc-arm-eabi-toolchains/bin/arm-eabi-g++)
set(CMAKE_AR /home/eslam/eslamlearning/gcc-arm-eabi-toolchains/bin/arm-eabi-ar)
set(CMAKE_FIND_ROOT_PATH /home/eslam/eslamlearning/gcc-arm-eabi-toolchains)
set(CMAKE_SYSROOT /home/eslam/)
set(CMAKE_STAGING_PREFIX /home/eslam/eslamlearning/learning/CPPtest)
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM BOTH)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY BOTH)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE BOTH)
set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE BOTH)
ADD_LIBRARY(LibsModule STATIC
print.cpp
)
SET( APP_EXE StaticTest )
add_executable(${APP_EXE} main.cpp)
TARGET_LINK_LIBRARIES(LibsModule )
TARGET_LINK_LIBRARIES( ${APP_EXE}
LibsModule )
What am I missing? BTW, I'm not sure if my SYSROOT path is correct or not.
One last question: I was reading https://gitlab.kitware.com/cmake/community/wikis/doc/cmake/CrossCompiling#the-toolchain-file, what is a target environment?