Refactor false-positive suppression for GCC 7

Author: d-frey

.travis.yml

@@ -52,7 +52,6 @@ matrix:
           packages: ['g++-7']
       env:
         - CXX=g++-7
-        - CXXFLAGS="-Wall -Wextra -Wno-maybe-uninitialized -Werror -O3"
 
     - compiler: gcc
       addons:
@@ -62,7 +61,6 @@ matrix:
       env:
         - CXX=g++-7
         - CXXSTD=-std=c++17
-        - CXXFLAGS="-Wall -Wextra -Wno-maybe-uninitialized -Werror -O3"
 
     - compiler: clang
       addons:
@@ -182,7 +180,6 @@ matrix:
       env:
         - CXX=g++-7
         - CPPFLAGS=-fsanitize=undefined
-        - CXXFLAGS="-Wall -Wextra -Wno-maybe-uninitialized -Werror -O3"
 
     - compiler: gcc
       sudo: required
@@ -193,7 +190,6 @@ matrix:
       env:
         - CXX=g++-7
         - CPPFLAGS="-fsanitize=address -fuse-ld=gold"
-        - CXXFLAGS="-Wall -Wextra -Wno-maybe-uninitialized -Werror -O3"
 
     - compiler: clang
       addons:

src/test/json/compare.cpp

@@ -3,6 +3,11 @@
 
 #include "test.hpp"
 
+// prevent false positives from GCC 7
+#if defined( __GNUC__ ) && ( __GNUC__ == 7 )
+#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#endif
+
 #include <tao/json/from_string.hpp>
 #include <tao/json/value.hpp>