How to add .h/.o already compiled libraries in CMake - c

Question

Seems like an easy problem but I can't seem to find any resource on this...
My project tree is simple: main.c includes list.h, the end.
cmake_minimum_required(VERSION 3.7)
project(as03)
set(CMAKE_C_STANDARD 11)
set(SOURCE_FILES main.c list.h)
add_executable(as03 ${SOURCE_FILES} list.o)
This CMakeLists.txt file gives error:
/home/.../clion-2017.1.2/bin/cmake/bin/cmake --build /home/shawn/CLionProjects/CMPT300/as03/cmake-build-debug --target all -- -j 4
[ 50%] Linking C executable as03
/usr/bin/ld: ../list.o: relocation R_X86_64_32S against undefined symbol `headlist' can not be used when making a shared object; recompile with -fPIC
/usr/bin/ld: final link failed: Nonrepresentable section on output
collect2: error: ld returned 1 exit status
CMakeFiles/as03.dir/build.make:96: recipe for target 'as03' failed
make[2]: *** [as03] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/as03.dir/all' failed
make[1]: *** [CMakeFiles/as03.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2
EDIT: Environment is CLion IDE on Linux with gcc 6.3.0.
EDIT2: My apologies, the
relocation R_X86_64_32S against undefined symbol `headlist' can not be used when making a shared object
error is not an issue of CMake, but was reproducible with command-line compiling of the corresponding makefile:
CC=gcc
CFLAGS=-w -std=c11
PROG=simulation-app
OBJS= main.o list.o
simulation-app: $(OBJS)
$(CC) $(CFLAGS) -o $(PROG) $(OBJS)
main.o: main.c
$(CC) $(CFLAGS) -c main.c
clean:
ls | grep -v list.o | grep .o | xargs rm
Turns out one of my peers have encountered this problem and was solved by re-installing a fresh linux-distro... No thanks.
So it seems like a machine-dependent problem. I have tried downgraded my gcc version to 5.4.1 to match the machine where this .o was compiled on, but nothing changed :(

Answer 1

add_executable(as03 main.c list.c)
You should only use sources in the list after the target, not object files.
You also don't need headers in the list unless you use or want to support IDEs (especially Visual Studio).