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Man Pages


Manual Reference Pages  -  CPARSER (1)

NAME

cparser - C compiler

CONTENTS

Synopsis
Description
Options
See Also
Bugs
Authors

SYNOPSIS

cparser [-c-| -S -| -E -| --print-ast ] [--print-implicit-cast] [--print-parenthesis] [-ansi] [-std=standard] [--[no-gcc]] [--[no-ms]] [-g] [-Olevel] [-W[no-[error=warning]]] [-w] [-I dir] [-L dir] [-Dmacro [=defn]] [-Umacro] [-f option] [-finput-charset=encoding] [-b option] [-l library] [-o outfile] [-x language] [-Wl,option] [-Wp,option]

DESCRIPTION

cparser is a C compiler, which can parse C90 and C99 as well as many GCC and some MSC extensions. It also provides many useful analyses for warnings and generates concise messages in case of error. It uses libFIRM for optimization and code generation. The compiler driver is largely compatible with GCC.

OPTIONS

-c Compile the input files to object files. The default output filename is the input filename with the extension replaced by .o.
-S Compile the input files to assembler. The default output filename is the input filename with the extension replaced by .s.
-E Preprocess the input file only. By default the result is output to stdout.
--print-ast Output the abstract syntax tree of the parsed input file as C again.
--print-implicit-cast When using --print-ast , show casts, which are inserted by the semantic checks.
--print-parenthesis When using --print-ast , show all expressions fully parenthesized.
-ansi Same as -std=c90 (for C) or -std=c++98 (for C++).
-std= standard Select the language standard. Supported values are:
c89
c90
iso9899:1990
  ISO C90
gnu89 ISO C90 with GCC extensions
c99
iso9899:1999
  ISO C99
gnu99 ISO C99 with GCC extensions
c11
iso9899:2011
  ISO C11
gnu11 ISO C11 with GCC extensions
c++98 ISO C++ 1998. Not supported yet.
gnu++98 ISO C++ 1998 with GCC extensions. Not supported yet.
--[no-gcc] Disable/enable GCC extensions. This switch supersedes -std .
--[no-ms] Disable/enable MSC extensions.
-g When compiling C files, add debug information in stabs format.
-O level Select the optimization level. Sensible values are between 0 and 4, inclusive.
-W warning Enable the specified warning.
-Wno- warning Disable the specified warning.
-Werror= warning Enable the specified warning and turn it into an error.
-Wno-error= warning Force the specified warning to only be a warning, even in the presence of -Werror . This neither enables nor disables the warning itself.
-Waddress Warn about suspicious use of addresses, like using the address of a function or variable as boolean condition or comparing with the address of a string literal.
-Waggregate-return Warn about defining or calling a function, which returns a struct or union by value.
-Wall Activate most warnings. In particular these are -Waddress , -Wattribute , -Wchar-subscripts , -Wcomment , -Wempty-statement , -Wformat , -Wimplicit-function-declaration , -Wimplicit-int , -Winit-self , -Wmain , -Wnonnull , -Wparentheses , -Wpointer-arith , -Wredundant-decls , -Wreturn-type , -Wshadow-local , -Wsign-compare , -Wstrict-prototypes , -Wswitch-enum , -Wunknown-pragmas , -Wunreachable-code , -Wunused-function , -Wunused-label , -Wunused-parameter , -Wunused-value , -Wunused-variable .
-Wcast-qual Warn whenever a pointer cast removes qualifiers from the pointed-to type, e.g. casting a const char* to char*.
-Wchar-subscripts Warn about using an expression of type char as array subscript, e.g. char c; arr[c].
-Wdeclaration-after-statement Warn about mixing declarations and statements, which is not allowed prior to C99.
-Wdiv-by-zero Warn about compile-time integer division by zero.
-Wempty-statement Warn about empty statements, i.e. statements which only consist of a single ';'. Use {} as replacement to avoid this warning.
-Werror Treat warnings as errors, i.e. do not continue after parsing when a warning is encountered.
-Wextra (Alias -W) Activate some more warnings. In particular these are -Wempty-statement , -Wshadow , -Wunused-parameter , -Wunused-value .
-Wfatal-errors Immediately abort compilation when encountering an error.
-Wformat Check format strings of char and wchar_t functions.
-Wimplicit Activate -Wimplicit-function-declaration , -Wimplicit-int .
-Wimplicit-function-declaration Warn about calling a function without a prior declaration.
-Wimplicit-int Warn about declarations whose declaration specifiers do not include a type specifier.
-Winit-self Warn about uninitialized variables which are initialized with themselves.
-Wlong-long Warn if the type 'long long' is used.
-Wmain Warn if the type of 'main' is suspicious, i.e. if it is not a non-static function declared as either int main(void), int main(int, char**) or, as an extension, int main(int, char**, char**).
-Wmissing-declarations Warn if a non-static function or a global variable without a storage class is defined without a prior declaration. This is typically a sign of a missing #include or that the object should be static.
-Wmissing-noreturn Warn about functions, which are candidates for the attribute 'noreturn'.
-Wmissing-prototypes Warn if a global function is defined without a previous prototype declaration.
-Wmultichar Warn if a multicharacter constant ('FOOF') is used.
-Wnested-externs Warn if an 'extern' declaration is encountered within a function.
-Wparentheses Warn if parentheses are omitted in certain contexts. Warn if an assignment is used as condition, e.g. if (x = 23). Warn if && without parentheses is used within ||, e.g. if (x || y && z). Warn if it there may be confusion which 'if' -statement an 'else' -branch belongs to, e.g. if (x) if (y) {} else {}. Warn if cascaded comparisons appear which do not have their mathematical meaning, e.g. if (23 <= x < 42). Warn if + or - is used as operand of << or >>, e.g. x + y << z.
-Wredundant-decls Warn about redundant declarations, i.e. multiple declarations of the same object or static forward declarations which have no use before their definition.
-Wshadow Warn when a new declaration shadows another declaration with the same name in an outer scope.
-Wshadow-local Like -Wshadow , but only warn if the shadowed declaration is not global, e.g. a local variable shadows a parameter or another local variable.
-Wunreachable-code Warn when the compiler determines that a statement (or in some cases a part thereof) will never be executed.
-Wunused Activate -Wunused-function , -Wunused-label , -Wunused-parameter , -Wunused-value , -Wunused-variable .
-Wunused-parameter Warn when a parameter is never used or only ever read to calculate its own new value, e.g. x = x + 1.
-Wunused-variable Warn when a variable is never used or only ever read to calculate its own new value, e.g. x = x + 1.
-w Suppress all warnings.
-I dir Add the directory dir to the paths to be searched for include files.
-L dir Add the directory dir to the paths to be searched for libraries.
-D macro Define the preprocessor macro macro which will expand to 1.
-D macro=defn Define the preprocessor macro macro and set its expanded value to defn.
-U macro Undefine the preprocessor macro macro.
-f option Set a frontend or optimizer option. Use -fhelp to get a list of supported optimizer options.
-f[no-diagnostics-show-option] Show the switch, which controls a warning, after each warning. Default is on.
-finput-charset= encoding Select the encoding of the input. Supported values are ISO_8859-1:1987 (aliases CP819, IBM819, ISO-8859-1, ISO8859-1, ISO_8859-1, csISOLatin1, iso-ir-100, l1 and latin1 ), ISO-8859-15 (aliases ISO8859-15, ISO_8859-15 and Latin-9 ), windows-1252 (alias cp1252 ) and UTF-8 (default). Case is ignored.
-f[no-show-column] Show the column number in diagnostic messages.
-fsigned-char Define 'char' to have the same range, representation and behaviour as 'signed char'.
-funsigned-char Define 'char' to have the same range, representation and behaviour as 'unsigned char'.
-b option Set a backend option. Use -bhelp to get a list of supported options.
-l library Link with the specified library.
-o outfile Specify the output filename. This is only valid when using a single input filename.
as filename uses stdout for output.
-x language Overwrite the language auto-detection for the following filenames by the specified language. Supported values are:
assembler Assembler file
assembler-with-cpp Assembler file, which needs to be preprocessed
c
c-header
  C file
c++
c++-header
  C++ file
none Revert to auto-detection
-Wl, option Pass option to the linker.
-Wp, option Pass option to the preprocessor.

SEE ALSO

gcc(1), http://www.libfirm.org/

BUGS

Probably many - if you hit one, please report it.

cparser needs to support more switches for better GCC compatibility.

This manual page is incomplete.

AUTHORS


.An -nosplit cparser was written by
.An Matthias Braun <matze@braunis.de>,
.An Christoph Mallon <christoph.mallon@gmx.de> and
.An Michael Beck .
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