+d

Does not expand C++ inline functions. 

–dryrun

Shows options passed by the driver to the compiler, but does not compile. 

–E

Runs only the preprocessor on the C++ source files and sends result to stdout. Does not compile.

–g

Compiles for use with the debugger. 

–g0

Compiles for debugging, but doesn’t disable inlining. 

–H

Prints path names of included files. 

–keeptmp

Retains temporary files created during compilation. 

–migration

Explains where to get information about migrating from earlier compilers. 

–P

Only preprocesses source; outputs to .i file.

–Qoption

Passes an option directly to a compilation phase. 

–readme

Displays the content of the online README file.

–s

Strips the symbol table out of the executable file, thus preventing the ability to debug code. 

–temp=dir

Defines directory for temporary files. 

–verbose=vlst

Controls compiler verbosity. 

-xcheck

Adds a runtime check for stack overflow. 

-xdumpmacros

Prints information about macros such as definition, location defined and undefined, and locations used. 

–xe

Only checks for syntax and semantic errors. 

–xhelp=flags

Displays a summary list of compiler options. 

–xport64

Warns against common problems during a port from a 32-bit architecture to a 64-bit architecture. 

–xs

Allows debugging with dbx without object (.o) files.

–xsb

Produces table information for the source browser. 

–xsbfast

Produces only source browser information, no compilation.