REFACTOR: Translated to internal file for setup towards singular Vec

CMakeLists.txt

@@ -3,12 +3,30 @@ project(libvec LANGUAGES C)
 set(CMAKE_C_STANDARD 23)
 set(CMAKE_C_STANDARD_REQUIRED ON)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
-include_directories(include)
 
-set(SOURCES
-        src/main.c
-        src/char.c
-        src/utils.c
+add_library(libvec STATIC
+    src/libvec.c
+    src/lib/char/char.c
+    src/lib/utils/utils.c
+    # Add your other types here as you implement them:
+    # src/lib/float/float.c
+    # src/lib/int/int.c
+    # src/lib/string/string.c
 )
 
-add_executable(libvec ${SOURCES})
+target_include_directories(libvec
+    # PRIVATE: Internal headers under src/lib are only visible
+    # to files being compiled into libvec (char.c, utils.c, libvec.c).
+    PRIVATE
+        ${CMAKE_CURRENT_SOURCE_DIR}/src/lib
+
+    # PUBLIC: Consumers (and test_runner) are granted access ONLY to include/
+    PUBLIC
+        ${CMAKE_CURRENT_SOURCE_DIR}/include
+)
+
+add_executable(test_runner src/main.c)
+
+# Linking libvec privately gives test_runner access to include/libvec.h,
+# but strictly hides src/lib/char/char.h and src/lib/utils/utils.h.
+target_link_libraries(test_runner PRIVATE libvec)