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The Loft compiler is a one-pass compiler that translates
Loft programs into C code and then compile it with the standard
C compiler. It runs under Linux and is called loft.
There are 5 main options:
Option -ft is the default option. All files containing
Loft code should be terminated by .loft or .LOFT. Standard C files can be given to loft and are
processed in the standard way.
As example, the command loft -direct test.loft produces an
executable a.out from the file test.loft.
There are others options:
-v to trace the actions performed by the compiler.
-debug like -v but the actions are not performed.
-code to only produce the C code.
-c to only produce the .o code (like the
standard C compiler).
-o to rename the executable (like the
standard C compiler).
-version to get the current version of the compiler.
For example, loft test.loft -debug produces something which
looks like:
/bin/loft/loft2ft test.loft > test.loft.c
gcc -I/include/loft -I/include/ft_v1.0 test.loft.c \
-L/lib/loft -lloft_ft \
-L/lib/ft_v1.0 -lfthread -lpthread
and loft -direct test.loft -debug produces:
/bin/loft/loft2c test.loft > test.loft.c
gcc -I/include/loft test.loft.c -L/lib/loft -lloft_c
The loft command actually uses the following processors and
libraries:
loft2c, loft2ft, loft2sem which
are the commands for producing C code corresponding to -direct, to
-ft, and to the 3 implementations of the semantics.
libloft_c.a, libloft_ft.a, libloft_rewrite.a, libloft_replace.a, libloft_optim.a, and libloft_gba.a which are the various
libraries for execution.
Some shell variables can be redefined for the command loft:
-
C_COMPILER to set a different C compiler.
-
LOFT_BINDIR, LOFT_INCLDIR, and
LOFT_LIBDIR to change the directories where the executables,
include files, and libraries
used by loft are placed.
-
FT_INCLDIR and FT_LIBDIR to change the
directories where the include file and the library needed by the -loft option are placed.
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