From: Petr Štetiar <ynezz@true.cz>
Date: Tue, 26 Nov 2019 07:32:57 +0000 (+0100)
Subject: cmake: use extra compiler warnings only on gcc6+
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=eb216a952407cae6cb8c456e1178721d4e6b36da;p=project%2Flibubox.git

cmake: use extra compiler warnings only on gcc6+

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>
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index b80d551..da7d03c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,7 +3,12 @@ INCLUDE(CheckLibraryExists)
 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)