Group Options
Compiler options can be set with the key=value expressions on the command line. These options are combined in logical groups. Multiple key=val expressions are colon separated; same group headings can be specified several times, the effects are cumulative:
E.g.: -OPT:roundoff=2:alias=restrict -OPT:IEEE_arithmetic=3 etc.
Group Heading Reference page Usage comments
-OPT:key=val cc(1) f77(1) opt(5) Optimizations
-TENV:key=val cc(1) f77(1) Control target environment
-TARG:key=val cc(1) f77(1) Control target architecture
-FLIST/CLIST cc(1) f77(1) Listing control
-LIST:key=val cc(1) f77(1) Options to control listing
-DEBUG:key=val debug_group(5) Debugging options
-IPA:key=val ipa(5) Inter-Procedural Analyzer control
-INLINE:key=val ipa(5) Procedure inliner control
-LNO:key=val lno(5) Loop Nest Optimizer control
-MP:key=val cc(1) f77(1) Parallelization control
-LANG: cc(1) f77(1) language compatibility features
-CG: cc(1) f77(1) code generation
-WOPT: cc(1) f77(1) global optimizer