When starting mysqld it did not recognize most of the options given on
the command line when it was compiled for 32-bit Solaris using Sun
Studio compiler. The cause for this was that most of the entries in
the my_long_options array contained "garbage" data. The garbage data
was caused by a compiler bug. When initilizing the def_value member
for the "default-storage-engine" entry it was initialized like this:

  (longlong)"MyISAM"

i.e. casting a 32 bit pointer to a 64 bit integer value. Due to the
compiler bug only 4 bytes was allocated (instead of 8 bytes). This
caused everything following this entry to be stored at a location that
was 4 byte wrong.

The fix/work-around for this problem is initialize the def_value
for default-storage-engine in my_long_options to 0 and instead
initialize the default_storage_engine variable to "MyISAM" in
init_common_variables().

sql/mysqld.cc:
  Due to a bug in Sun Studio compiler when generating 32 bit code the 
  initialization of the def_value member of the default-storage-engine entry 
  in my_long_options only got 4 bytes allocated instead of 8 bytes. 
  The compiler bug was triggered by casting a 32 bit pointer to a 64 bit 
  integer value in the initialization code for my_long_options. To avoid 
  triggering the compiler bug the intialization of the def_value in
  my_long_options is set to 0 and instead the default_storage_engine
  is initialized to "MyISAM" in init_common_variables().