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IWETHEY Home / IWETHEY Board / Theory and Practice of Programming Forum / Clang Clang Clang went the Trolley
Post #321,113
by Ashton
2/7/10 4:49:39 PM
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New Clang Clang Clang went the Trolley
Don't know squat about this, of course:
http://blog.llvm.org...y-self-hosts.html

But a compiler that can compile itself, well..
To understand recursion, one must first understand recursion..
-- doubtless everyone but moi knows author

Love It - why, it's better than being an allopathic alliteration addict accurately anticipating able advances, actually..
Post #321,120
by mvitale
Picture of mvitale
2/8/10 12:55:40 AM
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New Author
Edsger W. Dijkstra. Or so I've heard it attributed.
-Mike

"They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety."
- Benjamin Franklin, 1759 Historical Review of Pennsylvania
Post #321,121
by crazy
2/8/10 3:46:09 AM
Reply
New About time 

Here is one simple example that illustrates the difference between a typical GCC and Clang diagnostic:



  $ gcc-4.2 -fsyntax-only t.c

  t.c:7: error: invalid operands to binary + (have 'int' and 'struct A')

  $ clang -fsyntax-only t.c

  t.c:7:39: error: invalid operands to binary expression ('int' and 'struct A')

    return y + func(y ? ((SomeA.X + 40) + SomeA) / 42 + SomeA.X : SomeA.X);

                         ~~~~~~~~~~~~~~ ^ ~~~~~
Post #321,188
by static
Picture of static
2/8/10 5:30:54 PM
Reply
New It's normal to do it that way.
It's kind of like a stress-test for a new language or new compiler: can it compile itself? One reason is that compilers are usually quite involved programs but they generally consist of solved problems,

Other famous stress tests are a kernel and a standard libc library.

Wade.
Q:Is it proper to eat cheeseburgers with your fingers?
A:No, the fingers should be eaten separately.
     Clang Clang Clang went the Trolley - (Ashton) - (3) - Feb. 7, 2010, 04:49:39 PM EST
         Author - (mvitale) - Feb. 8, 2010, 12:55:40 AM EST
         About time - (crazy) - Feb. 8, 2010, 03:46:09 AM EST
         It's normal to do it that way. - (static) - Feb. 8, 2010, 05:30:54 PM EST

Must be what keeps your hair up.
65 ms