Epson S5U1C17001C, Руководство пользователя

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6-6
EPSOn
S5U1C17001C ManUal
(C COMPilEr PaCkagE fOr S1C17 faMily) (Ver. 1.5.0)
6 C COMPilEr
example, when a multidimensional array is initialized, a warning is output if parentheses are not
used correctly for each dimension.
Example:
long l_Array_1[3][3] = { 0, 1, 2, 3, 4, 5, 6, 7, 8 };
(Warning is output.)
long l _ Array _ 2[3][3] = { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 } };
(No warning is output.)
-Wparentheses
Outputs a warning when omission of parentheses results in ambiguities in the description. For
example, a warning is output if “{ }” are omitted from a nested if statement.
-Wsequence-point
Outputs a warning in the case of the standard C language specification if a code described might
result in undefined behavior due to the absence of an accurate execution sequence indication.
Example:
i_Array[i_Val++] = i_Val;
-Wreturn-type
Outputs a warning when the return value format is defined as the default “int” format since it is
not specified when the function was defined. Also outputs a warning when no value is returned
when the return value is a function other than the void type.
-Wswitch
Outputs a warning when case statements do not exist for all enum values when the
switch
statement uses a variable of the enum type for the index. (If a default label exists, this warning is
not output.) Also outputs a warning when a case statement specifies a value outside the range of
enum type.
-Wunused-function
Outputs a warning when a static function is declared but not defined. Also outputs a warning when
a static function that is not inline is defined but not used.
-Wunused-label
Outputs a warning when a label is declared but not used.
-Wunused-variable
Outputs a warning when a static variable other than local variable or const is declared but not
used.
-Wunused-value
Outputs a warning when a calculation is performed even though the calculation result clearly will
not be used.
-Wunused
Same as all “-Wunused-xxxx” above in the enabled state.
-Wuninitialized
Outputs a warning when a local variable is used without initialization. This warning is not output
when
-O0
is selected.
Default: The above warning options are disabled.
-mno-sjis-filt
Function: Disables the filter function for the Shift JIS code.
Description: This option disables the filter function for the Shift JIS code.
For detailed information on this filter function, refer to Section 6.5, “Filter Function for Shift JIS
Code.”
Default: The preprocessor performs filtering for Shift JIS code.