Wandbox

Ran/Viewed Log

Author

anonymous

about 7 years ago

Language

C++

Compiler

gcc HEAD 8.0.1 20180318 (experimental)

Options

Warnings

Boost 1.66.0

C++2a(GNU)

no pedantic

Raw compiler options

-fstrict-aliasing

Author

anonymous

about 7 years ago

a.h

$ g++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.66.0/gcc-head/include -std=gnu++2a -fstrict-aliasing

prog.cc: In function 'int main()':
prog.cc:9:26: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     printf("%i\n", j = *((short*)&a));
                         ~^~~~~~~~~~~
prog.cc:10:26: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     printf("%i\n", j = *((int*)&f));
                         ~^~~~~~~~~
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Exit Code:

0