What's new in GCC 4.5?
Posted May 19, 2010 21:46 UTC (Wed) by roelofs
In reply to: What's new in GCC 4.5?
Parent article: What's new in GCC 4.5?
Compiling gcc with a C++ compiler has already uncovered a number of latent bugs, such as comparing values of enum_type_1 to values of enum_type_2. That's not an error in C, because enums are just ints, but in C++ they're distinct types and the compiler catches the problem.
One unforeseen drawback we encountered, however: generated code size (that is, binaries) exploded. A 15 MB C-only executable grew to ~600 MB as parts of it were rewritten in C++. I still think it was worthwhile overall, but holy cow...don't underestimate the pain of creating, deploying, loading into memory, and core-dumping huge binaries. (Some of it might have been due to symbol visibility; I never had time to investigate. I think quite a bit was due to template use. No doubt you guys will figure out ways to keep it under control in GCC...)
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