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Compiling C Code with a C Compiler: Potential Issues and Mitigation
Compiling existing C code with a C compiler can introduce various challenges due to the differences in language specifications. Here are some key issues to be aware of:
Strict Type Checking:
C enforces stricter type checking than C. This can cause compilation errors for operations such as assigning integers to enumerated types, which is legal in C but would fail in C . To resolve this, explicit casting would be necessary.
Use of Reserved Keywords:
C introduces additional reserved keywords not present in C, such as "class," "namespace," and "virtual." Using these keywords as variable or function names would lead to compilation errors in C . Refactoring would be required to avoid conflicts.
Name Mangling:
By default, C compilers perform name mangling of symbols, including those defined in C code. This means that symbols in C files compiled with a C compiler could have different names from those compiled with a C compiler. To prevent this issue, C files should be wrapped in "extern "C" { ... }" blocks to indicate that the code should be treated as C and not subject to name mangling.
Type Mismatches:
C is more explicitly typed than C. Functions that expect "void" pointers in C may need to be explicitly cast to "Foo" pointers in C . This is necessary to match the specific type requirements of C .
Other Considerations:
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