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2019 Dec 04
2
[cfe-dev] clang and -D_FORTIFY_SOURCE=1
> Are you sure you've diagnosed the issue correctly? __builtin___memcpy_chk works correctly, as far as I know. 100% sure. Let's have a look at the output of #include <string.h> static char dest[10]; char* square(int n) { memcpy(dest, "hello", n); return dest; } compiled with -D_FORTIFY_SOURCE=1 -O1 : https://godbolt.org/z/UvABWp Clang issues a call to