MH> If the test is just to determine wether or not a 64bit
MH> architecture is being built for, then __arch64__ is a better
MH> test.
What is a 64 bit architecture?
Is it about address bus size? (The MC68020 is a 34-bit architecture?)
About data bus size? About register size? (The MC68040 is an 80-bit
architecture?) About the size that instructions operate on? (The P6
is a 128-bit architecture?)
LP64 has a well-defined technical meaning (it's about the size of data
types exported by the C compiler.) I have no idea what ``64-bit
architecture'' may mean.
Juliusz
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