Porting Options
Use the following options as necessary when porting your code from other operating environments to
The
•+O2
•+Ofltacc=relaxed
•+Onolimit
•+DSnative
•+FPD
You can override any of the options in
Use this option when porting C++ and C applications compiled on other UNIX operating systems to
NOTE: Do not use this option for programs that depend on IEEE standard
+sb
+sb
The +sb option specifies unqualified char, short, int,long, and long long bitfields as signed. The default is +sb.
NOTE: When both +sb and +uc are in effect, +uc will override this for char bit fields.
+ub
+ub
The +ub option specifies unqualified char, short, int, long, and long long bitfields as unsigned. This option has no effect on signedness of enum bitfields or on signedness of
+uc
+uc
By default, all unqualified char data types are treated as signed char. Specifying +uc causes an unqualified (plain) char data type to be treated as unsigned char. (Overloading and mangling are unchanged.)
Use this option to help in porting applications from environments where an unqualified (plain) char type is treated as unsigned char.
NOTE: Since all unqualified char types in the compilation unit will be affected by this option (including those headers that define external and system interfaces), it is necessary to compile the interfaces used in a single program uniformly.
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