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- 1 GCC
- The GCC command invokes the GNU C compiler.
-
- GCC file-spec
-
- 2 Parameters
-
- file-spec
-
- A C source file. If no input file extension is specified, GNU C
- assumes .C as the default extension.
-
- 2 Qualifiers
-
- GNU C command qualifiers modify the way the compiler handles the
- compiliation.
-
- The following is the list of available qualifiers for GNU C:
-
-
- /CC1_OPTIONS=(option [,option...]])
-
- /DEBUG
-
- /DEFINE=(identifier[=definition][,...])
-
- /INCLUDE_DIRECTORY=(path [,path...]])
-
- /MACHINE_CODE
-
- /OPTIMIZE
-
- /UNDEFINE=(identifier[,identifier,...])
-
- /VERBOSE
-
-
- 2 Linking
-
- When linking programs compiled with GNU C, you should include the GNU
- C library before the VAX C library. For example,
-
- LINK object-file,GNU_CC:[000000]GCCLIB/LIB,SYS$LIBRARY:VAXCRTL/LIB
-
- You can also link your program with the shared VAX C library. This
- can reduce the size of the .EXE file, as well as make it smaller
- when it's running. For example,
-
- $ LINK object-file, GNU_CC:[000000]GCCLIB/LIB,SYS$INPUT:/OPTIONS
- SYS$SHARE:VAXCRTL/SHARE
-
- (If you use the second example and type it in by hand, be sure to type
- ^Z after the last carriage return)
-
- 2 /DEBUG
-
- /DEBUG includes additional information in the object file output so
- that the program can be debugged with the VAX Symbolic Debugger.
- This qualifier includes very little information, so using the
- debugger is somewhat difficult.
-
- 2 /DEFINE=(identifier[=definition][,...])
-
- /DEFINE defines a string or macro ('definition') to be substituted
- for every occurrence of a given string ('identifier') in a program.
- It is equivalent to the #define preprocessor directive.
-
- All definitions and identifiers are converted to uppercase unless they
- are in quotation marks.
-
- The simple form of the /DEFINE qualifier,
-
- /DEFINE=vms
-
- results in a definition equivalent to the preprocessor directive
-
- #define VMS 1
-
- You must enclose macro definitions in quotation marks, as in this
- example:
-
- /DEFINE="C(x)=((x) & 0xff)"
-
- This definition is the same as the preprocessor definition
-
- #define C(x) ((x) & 0xff)
-
- If more than one /DEFINE is present on the GCC command line, only
- the last /DEFINE is used.
-
- If both /DEFINE and /UNDEFINE are present on a command line, /DEFINE
- is evaluated before /UNDEFINE
-
- 2 /INCLUDE_DIRECTORY=(path [,path...])
-
- The /INCLUDE_DIRECTORY qualifier provides additional directories to
- search for user-defined include files. 'path' can be either a
- logical name or a directory specification.
-
- There are two forms for specifying include files - #include "file-spec"
- and #include <file-spec>. For the #include "file-spec" form, the search
- order is:
-
- 1. The directory containing the source file.
-
- 2. The directories in the /INCLUDE qualifier (if any).
-
- 3. The directory (or directories) specified in the logical name
- GNU_CC_INCLUDE.
-
- 4. The directory (or directories) specified in the logical name
- SYS$LIBRARY.
-
- For the #include <file-spec> form, the search order is:
-
- 1. The directories specified in the /INCLUDE qualifier (if any).
-
- 2. The directory (or directories) specified in the logical name
- GNU_CC_INCLUDE.
-
- 3. The directory (or directories) specified in the logical name
- SYS$LIBRARY.
-
- 2 /MACHINE_CODE
-
- Tells GNU C to output the machine code generated by the compiler. Note
- that no object file is produced when /MACHINE_CODE is specified. The
- machine code is output to a file with the same name as the input file,
- with the extension .S.
-
- 2 /OPTIMIZE
- /NOOPTIMIZE
-
- Controls whether optimization is performed by the compiler. By default,
- optimization is on. /NOOPTIMIZE turns optimization off.
-
- 2 /UNDEFINE
-
- /UNDEFINE cancels a macro definition. Thus, it is the same as the
- #undef preprocessor directive.
-
- If more than one /UNDEFINE is present on the GCC command line, only
- the last /UNDEFINE is used.
-
- If both /DEFINE and /UNDEFINE are present on a command line, /DEFINE
- is evaluated before /UNDEFINE
-
- 2 /VERBOSE
-
- Controls whether the user sees the invocation command strings for the
- preprocessor, compiler, and assembler. The compiler also outputs
- some statistics on time spent in its various phases.
-
-