Using GCC 4.2 to compile *.mm files is very very slow, but LLVM has done a very good job, any difference?
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Published on 2011-11-22T01:20:17Z
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My project is obj-c and C++ hybirid, filled with by both *.m and *.mm.
When compiling, if choose GCC 4.2, *.m obj-c source files compile speed is very fast but *.mm very very slow, but LLVM 2.0 can do a very good job, it is very fast for both *.m and *.mm.
My question: Is there any difference between LLVM and GCC 4.2 during compliling *.mm files? why GCC 3.2 is so slow?
Any ieda or discussion will be appreciated, thanks in advance.
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