clang -O2  -Wall -Wextra -Werror=implicit-function-declaration stdlib/aligned_alloc.c -o stdlib/aligned_alloc -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE  -lm  -lintl
stdlib/aligned_alloc.c:10:14: error: implicit declaration of function 'aligned_alloc' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
        void* ptr = aligned_alloc(256, 768);
                    ^
stdlib/aligned_alloc.c:10:8: warning: incompatible integer to pointer conversion initializing 'void *' with an expression of type 'int' [-Wint-conversion]
        void* ptr = aligned_alloc(256, 768);
              ^     ~~~~~~~~~~~~~~~~~~~~~~~
1 warning and 1 error generated.