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BSD 2.11 - man page for symcompact (bsd section 1)

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symcompact(1)									    symcompact(1)

NAME
       symcompact - string compaction for object files

SYNOPSIS
       symcompact [ object_name ... ]

DESCRIPTION
       symcompact  reduces the symbol table size of an executable file.  This is done by removing
       unnecessary overlay transfer vectors (text symbols beginning with a tilde).  In a nonover-
       laid  program there is no need for both the underscore (_foo) and tilde (~foo) text symbol
       and only the underscore form is kept.  For overlaid programs if the symbol is in the  base
       segment	the  tilde  form  is  not needed and again only the underscore form is preserved.
       Running symcompact typically reduces the kernel symbol table size by 250 or so symbols.

       It is possible to run both symcompact and strcompact to achieve an even higher  degree  of
       symbol  and  string table compaction.  The normal sequence is to run symcompact first fol-
       lowed by strcompact.  If symcompact runs out of memory it will be necessary to reverse the
       order and run symcompact a second time - see the BUGS note below.

       The user must have write permission to the object/executable file.

       symcompact writes to stderr the count of symbols removed from the symbol table.

       symcompact exits 0 if successful, and >0 if an error occurred.

SEE ALSO
       symcompact(1), symorder(1)

BUGS
       This  program  can partially negate the benefits of strcompact because multiple references
       to identical strings cause additional strings to be placed in the string  table.   Running
       strcompact again after running this program fixes this problem.

       The  register  local  symbol  type  is removed from the executable/object file.	Since the
       debugger really doesn't know how to deal with those symbols this is not much of a loss and
       saves quite a bit of space both in the symbol table and the string table.

       symcompact  should  not	be run on .o files that will be passed to the linker.  The linker
       will need the tilde form of the symbol if an overlaid executable is being created.

3rd Berkeley Distribution		 January 25, 1994			    symcompact(1)
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