SYNOPSISjocamlopt [ -acivS ] [ -cclib libname ] [ -ccopt option ] [ -compact ] [ -unsafe ] [ -o exec-file ] [ -I lib-dir ] filename ...
jocamlopt.opt (same options)
DESCRIPTIONThe JoCaml high-performance native-code compiler jocamlopt(1) compiles Caml source files to native code object files and link these object files to produce standalone executables.
The jocamlopt(1) command has a command-line interface very close to that of jocamlc(1). It accepts the same types of arguments and processes them sequentially:
Arguments ending in .mli are taken to be source files for compilation unit interfaces. Interfaces specify the names exported by compilation units: they declare value names with their types, define public data types, declare abstract data types, and so on. From the file x.mli, the jocamlopt(1) compiler produces a compiled interface in the file x.cmi. The interface produced is identical to that produced by the bytecode compiler jocamlc(1).
Arguments ending in .ml are taken to be source files for compilation unit implementations. Implementations provide definitions for the names exported by the unit, and also contain expressions to be evaluated for their side-effects. From the file x.ml, the jocamlopt(1) compiler produces two files: x.o, containing native object code, and x.cmx, containing extra information for linking and optimization of the clients of the unit. The compiled implementation should always be referred to under the name x.cmx (when given a .o file, jocamlopt(1) assumes that it contains code compiled from C, not from Caml).
The implementation is checked against the interface file x.mli (if it exists) as described in the manual for jocamlc(1).
Arguments ending in .cmx are taken to be compiled object code. These files are linked together, along with the object files obtained by compiling .ml arguments (if any), and the Caml Light standard library, to produce a native-code executable program. The order in which .cmx and .ml arguments are presented on the command line is relevant: compilation units are initialized in that order at run-time, and it is a link-time error to use a component of a unit before having initialized it. Hence, a given x.cmx file must come before all .cmx files that refer to the unit x.
Arguments ending in .cmxa are taken to be libraries of object code. Such a library packs in two files lib.cmxa and lib.a a set of object files (.cmx/.o files). Libraries are build with jocamlopt -a (see the description of the -a option below). The object files contained in the library are linked as regular .cmx files (see above), in the order specified when the library was built. The only difference is that if an object file contained in a library is not referenced anywhere in the program, then it is not linked in.
Arguments ending in .c are passed to the C compiler, which generates a .o object file. This object file is linked with the program.
Arguments ending in .o or .a are assumed to be C object files and libraries. They are linked with the program.
The output of the linking phase is a regular Unix executable file. It does not need jocamlrun(1) to run.
jocamlopt.opt is the same compiler as jocamlopt, but compiled with itself instead of with the bytecode compiler jocamlc(1). Thus, it behaves exactly like jocamlopt, but compiles faster. jocamlopt.opt is not available in all installations of JoCaml.
The following command-line options are recognized by jocamlopt(1).
Build a library (.cmxa/.a file) with the object files (.cmx/.o
files) given on the command line, instead of linking them into an
executable file. The name of the library can be set with the
option. The default name is library.cmxa.
Compile only. Suppress the linking phase of the
compilation. Source code files are turned into compiled files, but no
executable file is produced. This option is useful to
compile modules separately.
- -cclib -llibname
option to the linker. This causes the given C library to be linked
with the program.
- -ccopt option
Pass the given option to the C compiler and linker. For instance,
causes the C linker to search for C libraries in
Optimize the produced code for space rather than for time. This
results in smaller but slightly slower programs. The default is to
optimize for speed.
Cause the compiler to print all defined names (with their inferred
types or their definitions) when compiling an implementation (.ml
file). This can be useful to check the types inferred by the
compiler. Also, since the output follows the syntax of interfaces, it
can help in writing an explicit interface (.mli file) for a file:
just redirect the standard output of the compiler to a .mli file,
and edit that file to remove all declarations of unexported names.
- -I directory
Add the given directory to the list of directories searched for
compiled interface files (.cmi) and compiled object code files
(.cmo). By default, the current directory is searched first, then the
standard library directory. Directories added with -I are searched
after the current directory, in the order in which they were given on
the command line, but before the standard library directory.
- -o exec-file
Specify the name of the output file produced by the linker. The
default output name is a.out, in keeping with the Unix tradition. If
option is given, specify the name of the library produced.
Keep the assembly code produced during the compilation. The assembly
code for the source file
is saved in the file
Print the version number of the compiler.
Turn bound checking off on array and string accesses (the v.(i) and
s.[i] constructs). Programs compiled with -unsafe are therefore
faster, but unsafe: anything can happen if the program accesses an
array or string outside of its bounds.