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This option enables the compilation of C99 source code. It enforces C only, and C++ syntax is not accepted.


This option can also be combined with other source language command-line options. For example, armcc --c99 --gnu.

To ensure conformance with the ISO/IEC 9899:1999, the 1999 International Standard for C, you must also use the --strict option.


For files having a suffix of .c, .ac, or .tc, --c90 applies by default.