3 ms·

Out of curiosity: would ./30cc_gcc (30cc complied by gcc-hosted 30cc) and ./30cc (30cc complied by self-hosted 30cc) be identical binary files, if 30cc was oper

• actionfromafar 2y ago
  No, gcc optimizes code output and can make code shorter and faster. A compiler can make many, many decisions which will show up as differences in the binary output.
  • mizzao 2y ago
    In my question above, both compilers are 30cc, except one of the 30cc's was compiled by gcc and the other self-hosted.
    • actionfromafar 2y ago
      Ah, sorry. In that case, my guess is, probably yes. The outputs of both of these are probably the same. But not for certain - see: https://www.cs.cmu.edu/~rdriley/487/papers/Thompson_1984_ReflectionsonTrustingTrust.pdf https://www.cs.cmu.edu/~rdriley/487/papers/Thompson_1984_Ref...
• keyvank 2y ago
  the asms should be identical, so the binaries should be identical too, unless the linker is undeterministic