Unable to compile libwebsockets using CMake? - c

Question

Here is the cmake configuration that i am using
cmake_minimum_required (VERSION 3.0)
project (Project)
set (CMAKE_CXX_FLAGS_DEBUG "-std=c++11 -O0 -DDEBUG -g")
set (CMAKE_C_FLAGS_DEBUG "-std=c++11 -O0 -DDEBUG -g")
set (CMAKE_CXX_FLAGS_RELEASE "-std=c++11 -O3")
set (CMAKE_C_FLAGS_RELEASE "-std=c++11 -O3")
add_subdirectory (external/libwebsockets)
include_directories (external/libwebsockets/lib)
include_directories (src/globals)
add_library (libwebsockets SHARED IMPORTED)
add_executable (Project src/main.c)
target_link_libraries (Project libwebsockets)
Libwebsockets have been added as a git submodule under external/libwebsockets . I am getting the following error while building with above configuration
In file included from /home/Project/server/src/main.c:2:0:
/home/Project/server/external/libwebsockets/lib/libwebsockets.h:43:24: fatal error: lws_config.h: No such file or directory
compilation terminated.
CMakeFiles/Project.dir/build.make:62: recipe for target 'CMakeFiles/Project.dir/src/main.c.o' failed
make[2]: *** [CMakeFiles/Project.dir/src/main.c.o] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/Project.dir/all' failed
make[1]: *** [CMakeFiles/Project.dir/all] Error 2
Makefile:149: recipe for target 'all' failed
make: *** [all] Error 2
can someone please help me out with where i am going wrong and if i am writing the CMake configuration script correctly ?

Answer 1

The following file cannot be found:
lws_config.h: No such file or directory
compilation terminated.
When referenced from libwebsockets.h at line 43:
libwebsockets.h:43:24:
This is generated whilst compiling main.c:
In file included from /home/Project/server/src/main.c:2:0:
Do you know whether you have `lws_config.h" in your submodule tree?