control: severity -1 serious
I reduced to a simple test case that involves no boost at all, and only a macro. cat test.cpp this code shows on ppc64el: $ g++ test.cpp -std=c++14 -c NO OUTPUT (wrong) $ g++ test.cpp -c test.cpp:2:2: warning: #warning defined linux [-Wcpp] #warning defined linux ^~~~~~~ test.cpp:6:2: warning: #warning defined __linux [-Wcpp] #warning defined __linux ^~~~~~~ good output. Is is a clear test case now? on amd64 both are returning correct, at least __linux is still defined. $ g++ test.cpp -c -std=c++14 test.cpp:6:2: warning: #warning defined __linux [-Wcpp] #warning defined __linux ^~~~~~~ $ g++ test.cpp -c test.cpp:2:2: warning: #warning defined linux [-Wcpp] #warning defined linux ^~~~~~~ test.cpp:6:2: warning: #warning defined __linux [-Wcpp] #warning defined __linux ^~~~~~~ I hope this makes the issue a little bit more clear! G.
