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Compiler options are instructions to the compiler to somehow modify its behavior (usually they are instructions to enable or disable a particular compiler feature). Compiler options are entered on the command-line when you invoke the command-line compiler. NOTE: Compile options are case-sensitive so for example i and I are different compiler options.

There are two kinds of compiler options

1. Flag options
2. Value options

Flag Options

Flag options are used to enable or disable a compiler feature.

To enable the feature use

   -option    or   -option+

where option is the particular compiler option.

To disable the feature use

   -option-

For example the nc option is used to enable/disable the processing of nested comments. So -nc or -nc+ is used to enable the processing of nested comments and -nc- is used to disable the processing of nested comments.

Value options are used to specify the value of some quantity.

To specify a value option use

   -optionVALUE

where option is the particular compiler option and VALUE is the value being specified.

For example the mw option is used to specify the maximum number of warnings that the compiler should process. So -mw2 is used to set the maximum number of warnings to 2.

More than one option can be specified so for example, if you want to compile the program bad.pas using brief messages and nested comments then you can enter

   ipc -b -nc bad.pas

Options can be combined so you can also enter

   ipc -bnc bad

or

   ipc -ncb bad

To turn off nested comment processing and brief message then you can enter

   ipc -nc- -b- bad

or

   ipc -ncb- bad

Options List

The command-line compiler options are listed below:

• -aN Align on N bytes
• -ao Trap assignment overflow errors
• -A Enable Asserts
• -b Use brief messages
• -C Identifiers are case-sensitive
• -cm20 Compatibility mode
• -ead Auto-declare input & output
• -ebh Allow binary & hex integers
• -eco Enable non-standard constants
• -ecr Allow constant ranges
• -edq Allow double-quoted literals
• -efn Enable non-standard functions
• -enn Allow non-numeric labels
• -eop Enable non-standard operators
• -eow Allow otherwise
• -epr Enable non-standard procedures
• -erd Allow relaxed declarations
• -ety Enable non-standard types
• -eui Allow underscores in identifiers
• -eva Enable non-standard variables
• -E Enable all extensions
• -gs Generate a WinNT/2000 service
• -hTEXT Add #!TEXT header
• -i Trap I/O errors
• -I Control informatory messages
• -ln Insert line-number debug info
• -mb Generate Borland compatible messages
• -mc Display message context
• -meN Set maximum errors
• -mm Generate Microsoft compatible messages
• -mwN Set maximum warnings
• -nc Allow nested comments
• -nu Non-standard unary operators
• -oNAME Set output filename
• -p Require parentheses
• -r Trap range errors
• -rtlf Send run-time errors to log file
• -rtmb Send run-time errors to message box
• -rtsc Send run-time errors to screen
• -s Strict var strings
• -sc Use short-circuit evaluation
• -so Maximum stack overflow checking
• -Snn Set stack size in K
• -u Trap use of undefined values
• -v Trap use of inactive variants
• -W Control warning messages

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