-D symbol=value symbol gets the value 'value'
common used examples (see INSTALL for more info):
-Duse64bitint use 64bit integers
- -Duse64bitall use 64bit inttegers and pointers
+ -Duse64bitall use 64bit integers and pointers
-Dusethreads use thread support
- -Dinc_version_list=none do not include older perl treess in @INC
+ -Dinc_version_list=none do not include older perl trees in @INC
-DEBUGGING=none DEBUGGING options
-Dcc=gcc choose your compiler
-Dprefix=/opt/perl5 choose your destination