Date: 2012-11-27 02:33:24 +0000 (Tue, 27 Nov 2012)
Overhaul of section layout: Previously, each input section is matched
against all the wildcard list defined in the linker script for output
sections to determine where to insert it. This is incredibly
slow. This commit adds a hash table to record previous search results
in the wildcard list for a certain section name, so that if the same
section name is encountered again, linker can tell if there is a
wildcard list match by looking at the hash table. After this change,
the wildcard list search time is reduced to negligible amount and
performance is increased dramatically.
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