Revert "[DBG] remove warnings"

This reverts commit 3af28bb.

CMakeLists.txt

@@ -39,14 +39,14 @@ if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
     set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS  "Debug" "Release" "MinSizeRel" "RelWithDebInfo")
 endif()
 
-# if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID MATCHES "Clang")
-#   add_compile_options(-Wall -Wextra -Werror)
-#   # add_compile_options(-Wpedantic)
-#   add_compile_options(-Wno-shift-negative-value)
-#   if(NOT CMAKE_C_COMPILER_ID MATCHES "AppleClang")
-#     add_link_options("-Wl,-z,relro,-z,now,-z,defs")
-#   endif()
-# endif()
+if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID MATCHES "Clang")
+  add_compile_options(-Wall -Wextra -Werror)
+  # add_compile_options(-Wpedantic)
+  add_compile_options(-Wno-shift-negative-value)
+  if(NOT CMAKE_C_COMPILER_ID MATCHES "AppleClang")
+    add_link_options("-Wl,-z,relro,-z,now,-z,defs")
+  endif()
+endif()
 
 aux_source_directory(common COMMON_SRC)
 set(APRILTAG_SRCS apriltag.c apriltag_pose.c apriltag_quad_thresh.c)