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-c Suppress linking with ld(1) and produce a .o file for each source file. A single object file can be named explicitly using the -o option. -C Prevent the C preprocessor from removing comments. -E Run the source file through the C preprocessor, only. Sends the output to the standard output, or to a file named with the -o option. Includes the cpp line numbering information. (See also, the -P option.) -g Produce additional symbol table information for dbx(1) and dbxtool(1). When this option is given, the -O and -R options are suppressed. -help Display helpful information about compiler. -Ipathname Add pathname to the list of directories in which to search for #include files with relative filenames (not beginning with slash /). The preprocessor first searches for #include files in the directory containing sourcefile, then in directories named with -I options (if any), and finally, in /usr/include. -llibrary Link with object library library (for ld(1)). This option must follow the sourcefile arguments. -Ldirectory Add directory to the list of directories contain- ing object-library routines (for linking using ld(1). -M Run only the macro preprocessor on the named C programs, requesting that it generate makefile dependencies and send the result to the standard output (see make(1) for details about makefiles and dependencies). -o outputfile Name the output file outputfile. outputfile must have the appropriate suffix for the type of file to be produced by the compilation (see FILES, below). outputfile cannot be the same as source- file (the compiler will not overwrite the source file). -O[level] Optimize the object code. Ignored when either -g or -a is used. -O with the level omitted is equivalent to -O2. level is one of: 1 Do postpass assembly-level optimization only. 2 Do global optimization prior to code generation, including loop optimiza- tions, common subexpression elimination, copy propagation, and automatic register allocation. -O2 does not optimize refer- ences to or definitions of external or indirect variables. If the optimizer runs out of memory, it tries to recover by retrying the current procedure at a lower level of optimization and resumes subsequent procedures at the original level. -P Run the source file through the C preprocessor, only. Puts the output in a file with a .i suffix. Does not include cpp-type line number information in the output