Kyle Moffett wrote:
Dereferencing null pointers is relied upon by a number of various
emulators and such, and is "platform-defined" in the standard, so
since Linux allows mmap at NULL, GCC shouldn't optimize that case
any differently.
From the GCC manual: "The compiler assumes that dereferencing a null
pointer would have halted the program. If a pointer is checked after it
has already been dereferenced, it cannot be null. In some environments,
this assumption is not true, and programs can safely dereference null
pointers. Use -fno-delete-null-pointer-checks to disable this
optimization for programs which depend on that behavior. "
--
Robert Hancock Saskatoon, SK, Canada
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