Microchip Technology XC8 Standard Compiler (Workstation) SW006021-1 SW006021-1 User Manual
Product codes
SW006021-1
MPLAB
®
XC8 C Compiler User’s Guide
DS52053B-page 90
2012 Microchip Technology Inc.
4.6.5
Changing Message Behavior
Both the attributes of individual messages and general settings for the messaging sys-
tem can be modified during compilation. There are both driver options and C pragmas
that can be used to achieve this.
tem can be modified during compilation. There are both driver options and C pragmas
that can be used to achieve this.
4.6.5.1
DISABLING MESSAGES
Each warning message has a default number indicating a level of importance. This
number is specified in the MDF and ranges from -9 to 9. The higher the number, the
more important the warning.
number is specified in the MDF and ranges from -9 to 9. The higher the number, the
more important the warning.
Warning messages can be disabled by adjusting the warning level threshold using the
--WARN
--WARN
driver option, see Section 4.8.59 “--WARN: Set Warning Level”. Any warn-
ings whose level is below that of the current threshold are not displayed.
The default threshold is 0 which implies that only warnings with a warning level of 0 or
higher will be displayed by default. The information in this option is propagated to all
compiler applications, so its effect will be observed during all stages of the compilation
process.
higher will be displayed by default. The information in this option is propagated to all
compiler applications, so its effect will be observed during all stages of the compilation
process.
Warnings may also be disabled by using the --MSGDISABLE option, see
Section 4.8.38 “--MSGDISABLE: Disable Warning Messages”. This option takes a
comma-separated list of message numbers. Those warnings listed are disabled and
will never be issued, regardless of the current warning level threshold.
Section 4.8.38 “--MSGDISABLE: Disable Warning Messages”. This option takes a
comma-separated list of message numbers. Those warnings listed are disabled and
will never be issued, regardless of the current warning level threshold.
Some warning messages can also be disabled by using the warning pragma. This
pragma will only affect warnings that are produced by either the parser or the code gen-
erator; i.e., errors directly associated with C code. See Section 5.14.4.11 “The
#pragma warning Directive” for more information on this pragma.
pragma will only affect warnings that are produced by either the parser or the code gen-
erator; i.e., errors directly associated with C code. See Section 5.14.4.11 “The
#pragma warning Directive” for more information on this pragma.
Error messages can also be disabled; however, a more verbose form of the command
is required to confirm the action. To specify an error message number in the --MSG-
DISABLE
is required to confirm the action. To specify an error message number in the --MSG-
DISABLE
command, the number must be followed by :off to ensure that it is disabled.
For example: --MSGDISABLE=195:off will disable error number 195.
4.6.5.2
CHANGING MESSAGE TYPES
It is also possible to change the type of some messages. This can only be done for
messages generated by the parser or code generator. See Section 5.14.4.11 “The
#pragma warning Directive” for more information on this pragma.
messages generated by the parser or code generator. See Section 5.14.4.11 “The
#pragma warning Directive” for more information on this pragma.
Note:
Disabling error or warning messages in no way fixes the condition which
triggered the message. Always use extreme caution when exercising these
options.
triggered the message. Always use extreme caution when exercising these
options.