This option enables or disables the use of the C99 keyword
restrict.
Note
The alternative keywords __restrict and __restrict__ are
supported as synonyms for restrict. These alternative
keywords are always available, regardless of the use of the --restrict option.
Default
When compiling ISO C99 source code, use of the C99 keyword restrict is
enabled by default.
When compiling ISO C90 or ISO C++ source code, use of the
C99 keyword restrict is disabled by default.
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