gcc version 4.8.4 (Ubuntu 14.04) and -Wextra produces following:
json_script.c:124:3: error: missing initializer for field 'name' of 'struct blobmsg_policy' [-Werror=missing-field-initializers]
Reported-by: Jonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: Petr Štetiar <ynezz@true.cz>
INCLUDE(CheckFunctionExists)
PROJECT(ubox C)
-ADD_DEFINITIONS(-Os -Wextra -Wall -Werror --std=gnu99 -g3 -Wmissing-declarations -Wno-unused-parameter)
+
+ADD_DEFINITIONS(-Wall -Werror)
+IF(CMAKE_C_COMPILER_VERSION VERSION_GREATER 6)
+ ADD_DEFINITIONS(-Wextra)
+ENDIF()
+ADD_DEFINITIONS(-Os -std=gnu99 -g3 -Wmissing-declarations -Wno-unused-parameter)
OPTION(BUILD_LUA "build Lua plugin" ON)
OPTION(BUILD_EXAMPLES "build examples" ON)