| -c | Suppress the link-edit phase of the compilation, and do not remove any object files that are produced. |
| -D name [= value] |
| | Define name as if by a C-language #define directive. If no "= value" is given, a value of 1 will be used. Note that in order to request a translation as specified by -p1003.2 you need to define _POSIX_SOURCE either in the source or using this option. The -D option has lower precedence than the -U option. That is, if name is used in both a -U and a -D option, name will be undefined regardless of the order of the options. The -D option may be specified more than once. |
| -E | Copy C-language source files to the standard output, expanding all preprocessor directives; no compilation will be performed. |
| -g | Produce symbolic information in the object or executable files. |
| -I directory |
| | Change the algorithm for searching for headers whose names are not absolute pathnames to look in the directory named by the directory pathname before looking in the usual places. Thus, headers whose names are enclosed in double-quotes ("") will be searched for first in the directory of the file with the #include line, then in directories named in -I options, and last in the usual places. For headers whose names are enclosed in angle brackets (<>), the header will be searched for only in directories named in -I options and then in the usual places. Directories named in -I options shall be searched in the order specified. The -I option may be specified more than once. |
| -L directory |
| | Change the algorithm of searching for the libraries named in the -l objects to look in the directory named by the directory pathname before looking in the usual places. Directories named in -L options will be searched in the order specified. The -L option may be specified more than once. |
| -o outfile |
| | Use the pathname outfile, instead of the default a.out, for the executable file produced. |
| -O | Optimize the compilation. |
| -s | Produce object and/or executable files from which symbolic and other information not required for proper execution has been removed (stripped). |
| -U name |
| | Remove any initial definition of name. The -U option may be specified more than once. |
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