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- > !ShellC.!ReadMe 0.20 (11-Mar-1992)
-
- Contents:
-
- 1.) What is ShellC ?
- 2.) What is a CLI shell ?
- 3.) How can I compile C programs using ShellC ?
- 4.) Controlling C compiler features
- 5.) Before starting ...
- 6.) Advanced features of ShellC
- 7.) The 'claim all' option
- 8.) How are file compiled ?
-
- 1.) What is ShellC ?
-
- This program serves two purposes:
-
- - It is a window-based CLI shell, you may type *commands and examine their
- output in the window (try e.g. MODULES).
-
- - It gives easy desktop access to the Acorn C compiler, and gives you the
- opportunity to examine the output of the compiler in a window.
-
-
- 2.) What is a CLI shell ?
-
- A CLI shell is a user interface to operating system commands (under RISC OS
- called *commands). Unfortunately, the CLI shell of RISC OS is not
- multitasking and does not run in a window. ShellC is a pre-version of a
- window-based CLI_Shell. It is similar to the TaskWindow of !Edit, but it
- executes commands as a whole and displays their output in its window after
- the command has been executed. Edit's TaskWindow, however, gains control
- while the command is executed, so it is much slower and it needs !Edit to be
- loaded.
-
-
- 3.) How can I compile C programs using ShellC ?
-
- ShellC provides easy desktop access to the Acorn C compiler Release 3. A C
- file may be compiled by dragging it (or the c directory containing it) on
- the !ShellC icon on the icon bar. The output of the Ccompiler is then
- displayed in the shell window and can be examined using the scroll bars of
- the window. The shell checks if a directory or file dragged to its icon is
- valid (i.e. if it is either a directory called 'c' containing a source file
- or if it is a source file in a directory called 'c'), compiles it and
- displays the output of the compiler in its window.
-
- To recompile the file, simply press F2, click on the ShellC icon with Adjust
- or choose recompile from the shell window's menu.
-
-
- 4.) Controlling C compiler features
-
- The shell uses a MakeFile to compile C source files. All compiler and linker
- flags are controlled by the ConfigC application that is started by choosing
- 'Configure' from ShellC's iconbar menu.
- It gives you access to almost all compiler and linker flags and you may
- specify the filename of the output file either as an explicit name (e.g.
- !RunImage) or to be the same as the source filename.
- The 'Memory allocation' options give you control over the amount of memory
- that is allocated to the next slot before the compiler is started. If you
- select 'all memory', all but 32k are allocated to the next slot.
-
- Note that any changes only come into effect if you click on the Save button.
-
- 5.) Before starting ...
-
- ***************************************************************************
- * *
- * Before you can use the shell to compile C programs, you must set the *
- * variable C$Place in ShellC's !Run file to the directory containing your *
- * compiler (Acorn C Release 3) (this is the directory containg e.g. the *
- * directories CLib, Library, ...). *
- * *
- ***************************************************************************
-
-
- 6.) Advanced features of ShellC
-
- Using *ShellObey <command> you can send a command string to the shell. It
- is executed as if it was typed in.
- If you supply the -a flag (i.e. ShellObey -a <command>), all free memory is
- allocated to the 'next slot' before executing the command.
- If you supply the -s flag, the memory specified by the last *ShellSlot
- command is allocated to the 'next slot' before executing the command. So,
- e.g. *ShellSlot 64
- *ShellObey -s HelloWorld
- runs the HelloWorld program with 64kB memory in the shell window.
- *ShellSlot <size> gives the size in kB to allocate to the 'next slot' if
- ShellObey -s is used.
-
-
- 7.) The 'claim all' option
-
- If 'claim all' is switched off, only the output of *commands is displayed
- in the window and if a non-wimp task is started, it gets a RISC OS standard
- task-window.
- If 'claim all' is selected, the output of tasks is claimed, too. This
- means, that e.g. the output of the C compiler is displayed in the shell
- window and not in a RISC OS command window.
-
- 8.) How are files compiled ?
-
- The compilation of a file is done as follows:
- The shell module task gets a message if a file is dragged to its icon.
- It starts !CompFile, giving the name of the file as parameter. !CompFile
- sets the slot for the BASIC program CompFile, which reads the !Options file
- created by ConfigC and works out the command string to pass to the amu
- (Acorn Make Utility), which is used to compile the source file. CompFile
- then issues a *ShellObey command to pass the amu command to the shell. A
- Makefile is used to compile the source file and most of the Makefile
- consists of macros, which are defined in the command string created by
- CompFile.
- It sounds quite complicated, but the filename processing etc. needs not to
- be done in ARM code. In addition to that, the shell is a standalone program
- and if someone should want to use it with a different compiler, it can be
- modified easily. If a file is dragged to its icon the shell simply starts
- the obey file !CompFile quoting the filename of the source file as a
- parameter. If configure is chosen from the menu, the file !Configure is
- started.
-
- 9.) Shortcuts
-
- F1: repeat last command (should not be used if last command was the
- compilation of a C source file)
- F2: repeat last compilation
-
- If you drag a file to the shell window, its full path name appears in the
- window as if it was typed in.
-
- 10.) Changes
-
- Version 0.20:
-
- - <CLI$Prompt> is now evaluated to give you the real command-line-feeling
- (if you should have changed it)
- - Repeat and Recompile option added
- - The pathname of a file can be obtained by dragging it to the shell window
-
- 11.) Things to be done
-
- - Sorry, there are no editing facilities yet ... I will do that as soon as I
- have the time
- - The screen is redrawn after a command has been processed. This is an
- operating-system problem but could be solved
-
-
-
- ----------------------------------------------------------------------------
-
- This program is freeware, i.e. it may be copied freely, provided that no
- part of it is changed and that it is not sold for profit.
-
- © 1992, Martin Wuerthner
- Jahnstrasse 18
-
- W-7034 Gaertringen
-
- (Germany)
-
- ----------------------------------------------------------------------------
-
-