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compile.txt
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1999-06-05
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The compile command
Usage
compile [-clean] [-verbose] [[1] compile_to_c_options] <Root-Class>
[<Root-Procedure>]
Command compile is the SmallEiffel compiler.
Source code is Eiffel and target code is ANSI C code.
Command compile executes in two major steps:
Step 1 - command compile_to_c is called to produce various C files
(*.h and *.c). A script file is also produced by command compile_to_c.
The name of the script file is also printed by command compile_to_c
(*.make on Unix or *.BAT on DOS for example).
Step 2 - The script file produced during step 1 is runned, launching
the C compilation and linking of all the C files produced during the
previous step .
Thus, command compile is a simple launcher used to sequentially call
command [2]compile_to_c, the C compiler and the linker.
Like command compile_to_c, command compile must have at least one
argument to indicate the starting execution point of the system. Thus
execution will start in <Root-Procedure> of <Root-Class>. The default
<Root-Procedure> is make.
Options
-clean:
By default, the generated C files and object files are kept
from one invocation of command compile to another. This enables
incremental C compilation, since only the C files which have
been modified since the last invocation of command compile will
be recompiled. Because the Eiffel to C compilation performed by
SmallEiffel is generally much faster than the C compilation
itself, incremental C compilation saves times. However, there
are situations where you want to get rid of all the previously
generated C and object files, to start afresh. This occurs, for
example, when you change the C compiler options: these new
options apply only to the C files which are actually recompiled
(see example 3 below).
Option -clean removes the C and object files previously
generated by making command clean be called at the end of the
compilation.
-verbose:
Displays (a lot of) useful information during the compilation
(full path of loaded files, type inference score, generated
files, etc).
Examples
Example 1
When SmallEiffel is correctly installed, you can simply type the
following command to test the hello world program:
compile hello_world
The compiler should tell you what's wrong or should compile Eiffel
source files telling you the full path used to load the Eiffel source
code.
Under UNIX, the executable file is named "a.out" by default.
Example 2
Type following command to finalize the hello_world simple program:
compile -boost -no_split -O3 hello_world
Note that option -O3 is passed to the C compiler (see the manual of
your C compiler). Options -boost and -no_split are passed to command
[3]compile_to_c. This is usually the best way to finalize your
application.
Only one C file is produced (option -no_split)
Example 3
To compile a big project (class PROJECT) with C files splitting and
require assertions checked:
compile -require_check project
The very first time, all C files are produced and compiled. Then, if
you type the same command after some changes in the Eiffel source
files, all C files are also produced from scratch. If there are only
minor changes in the generated C files, only modified ones are passed
to the C compiler (previous object files have been saved).
Keep in mind that C compiler options are not taken into account. Thus
if you now want to do:
compile -require_check project -O3
You must use the clean command before:
clean project
All C files will be then recompiled using the new C option -O3. You
are thus sure that the new C options are taken into account.
[Line]
Copyright © Dominique COLNET and Suzanne COLLIN - [4]<colnet@loria.fr>
Last update: 05 June 1999, by DC & OZ.
References
1. file://localhost/home/colnet/SmallEiffel/man/man/compile_to_c.html
2. file://localhost/home/colnet/SmallEiffel/man/man/compile_to_c.html
3. file://localhost/home/colnet/SmallEiffel/man/man/compile_to_c.html
4. mailto:colnet@loria.fr