diff options
Diffstat (limited to 'README')
| -rw-r--r-- | README | 49 |
1 files changed, 18 insertions, 31 deletions
@@ -5,7 +5,7 @@ Features: -------- - SMALL! You can compile and execute C code everywhere, for example on - rescue disks (27KB for x86 TCC executable). + rescue disks (29KB for x86 TCC executable). - FAST! tcc generates optimized x86 code. No byte code overhead. Compiles, assemble and link about 7 times faster than 'gcc @@ -87,35 +87,17 @@ when doing 'make test'. Exact differences with ANSI C: ----------------------------- -1) Preprocessor - - - the preprocessor tokens are the same as C. It means that in some - rare cases, preprocessed numbers are not handled exactly as in ANSI - C. This approach has the advantage of being simpler and FAST! - -2) C language - -- Cannot pass struct/union as value. Cannot assign struct/union (use - memcpy instead). +- Preprocessor: the preprocessor tokens are the same as C. It means + that in some rare cases, preprocessed numbers are not handled + exactly as in ANSI C. This approach has the advantage of being + simpler and FAST! - Types: floating point numbers are not supported yet. -- (BUG) 'char' and 'short' casts do not truncate correctly. - -- 'sizeof' may not work if too complex expression is given. - -- bit fields are not supported. +- Bit fields are not supported. -- L'c' or L"string" for wide chars are parsed but not handled as wchar_t. - -- Cannot initialize auto (=local) arrays with implicit size - (workaround: specificy exact size in array declaration). Cannot - initialize auto arrays with strings. - -3) Linking - -- extern variables must appear in a referenced dll and cannot appear - in current source. +- Linking: extern variables must appear in a referenced dll and cannot + appear in current source. Supported ANSI C extensions: --------------------------- @@ -126,15 +108,20 @@ Supported ANSI C extensions: - '__func__' is a string variable containing the current function name (ISOC99). -- variadic macros: __VA_ARGS__ can be used for function-like macros (ISOC99): +- Variadic macros: __VA_ARGS__ can be used for function-like macros (ISOC99): #define dprintf(level, __VA_ARGS__) printf(__VA_ARGS__). -- declarations can appear anywhere in a block (ISOC99). +- Declarations can appear anywhere in a block (ISOC99). + +- Array and struct/union elements can be initialized in any order by + using designators (.e.g. { [0].x = 1 }) (ISOC99). + +- Compound initializers are supported (e.g. int *p = (int []){ 1, 2, + 3}) (ISOC99). -- array and struct/union elements can be initialized in any order by - using designators (.e. { [0].x = 1 }) (ISOC99). +- '#!' at the start of a line is ignored to allow scripting. -- binary digits can be entered ('0b101' instead of '5'). +- Binary digits can be entered ('0b101' instead of '5'). Technical Description: --------------------- |