check_strerror_r_char_p.cpp

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#include <errno.h>
#include <string.h>

int main()
{
    const int errnum = 0;
        const int bufferLength = 256;
        char buffer[bufferLength + 1];
        errno = 0;
    const char* result = ::strerror_r(errnum, buffer, bufferLength);
}