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(gcj-300.info)Configure-time Options

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Configure-time Options
======================

   Some `gcj' code generations options affect the resulting ABI, and so
can only be meaningfully given when `libgcj', the runtime package, is
configured.  `libgcj' puts the appropriate options from this group into
a `spec' file which is read by `gcj'.  These options are listed here
for completeness; if you are using `libgcj' then you won't want to
touch these options.

`-fuse-boehm-gc'
     This enables the use of the Boehm GC bitmap marking code.  In
     particular this causes `gcj' to put an object marking descriptor
     into each vtable.

`-fhash-synchronization'
     By default, synchronization data (the data used for `synchronize',
     `wait', and `notify') is pointed to by a word in each object.
     With this option `gcj' assumes that this information is stored in a
     hash table and not in the object itself.

`-fuse-divide-subroutine'
     On some systems, a library routine is called to perform integer
     division.  This is required to get exception handling correct when
     dividing by zero.