Module Config

module Config: sig .. end

System configuration

Warning: this module is unstable and part of compiler-libs.

val version : string

The current version number of the system

val standard_library : string

The directory containing the standard libraries

val ccomp_type : string

The "kind" of the C compiler, assembler and linker used: one of "cc" (for Unix-style C compilers) "msvc" (for Microsoft Visual C++ and MASM)

val c_compiler : string

The compiler to use for compiling C files

val c_output_obj : string

Name of the option of the C compiler for specifying the output file

val c_has_debug_prefix_map : bool

Whether the C compiler supports -fdebug-prefix-map

val as_has_debug_prefix_map : bool

Whether the assembler supports --debug-prefix-map

val ocamlc_cflags : string

The flags ocamlc should pass to the C compiler

val ocamlc_cppflags : string

The flags ocamlc should pass to the C preprocessor

val ocamlopt_cflags : string

The flags ocamlopt should pass to the C compiler

val ocamlopt_cppflags : string

The flags ocamlopt should pass to the C preprocessor

val bytecomp_c_libraries : string

The C libraries to link with custom runtimes

val native_c_libraries : string

The C libraries to link with native-code programs

val native_pack_linker : string

The linker to use for packaging (ocamlopt -pack) and for partial links (ocamlopt -output-obj).

val mkdll : string

The linker command line to build dynamic libraries.

val mkexe : string

The linker command line to build executables.

val mkmaindll : string

The linker command line to build main programs as dlls.

val ranlib : string

Command to randomize a library, or "" if not needed

val ar : string

Name of the ar command, or "" if not needed (MSVC)

val cc_profile : string

The command line option to the C compiler to enable profiling.

val load_path : string list ref

Directories in the search path for .cmi and .cmo files

val interface_suffix : string ref

Suffix for interface file names

val exec_magic_number : string

Magic number for bytecode executable files

val cmi_magic_number : string

Magic number for compiled interface files

val cmo_magic_number : string

Magic number for object bytecode files

val cma_magic_number : string

Magic number for archive files

val cmx_magic_number : string

Magic number for compilation unit descriptions

val cmxa_magic_number : string

Magic number for libraries of compilation unit descriptions

val ast_intf_magic_number : string

Magic number for file holding an interface syntax tree

val ast_impl_magic_number : string

Magic number for file holding an implementation syntax tree

val cmxs_magic_number : string

Magic number for dynamically-loadable plugins

val cmt_magic_number : string

Magic number for compiled interface files

val max_tag : int

Biggest tag that can be stored in the header of a regular block.

val lazy_tag : int

Normally the same as Obj.lazy_tag. Separate definition because of technical reasons for bootstrapping.

val max_young_wosize : int

Maximal size of arrays that are directly allocated in the minor heap

val stack_threshold : int

Size in words of safe area at bottom of VM stack, see runtime/caml/config.h

val stack_safety_margin : int

Size in words of the safety margin between the bottom of the stack and the stack pointer. This margin can be used by intermediate computations of some instructions, or the event handler.

val architecture : string

Name of processor type for the native-code compiler

val model : string

Name of processor submodel for the native-code compiler

val system : string

Name of operating system for the native-code compiler

val asm : string

The assembler (and flags) to use for assembling ocamlopt-generated code.

val asm_cfi_supported : bool

Whether assembler understands CFI directives

val with_frame_pointers : bool

Whether assembler should maintain frame pointers

val ext_obj : string

Extension for object files, e.g. .o under Unix.

val ext_asm : string

Extension for assembler files, e.g. .s under Unix.

val ext_lib : string

Extension for library files, e.g. .a under Unix.

val ext_dll : string

Extension for dynamically-loaded libraries, e.g. .so under Unix.

val default_executable_name : string

Name of executable produced by linking if none is given with -o, e.g. a.out under Unix.

val systhread_supported : bool

Whether the system thread library is implemented

val flexdll_dirs : string list

Directories needed for the FlexDLL objects

val host : string

Whether the compiler is a cross-compiler

val target : string

Whether the compiler is a cross-compiler

val profiling : bool

Whether profiling with gprof is supported on this platform

val flambda : bool

Whether the compiler was configured for flambda

val with_flambda_invariants : bool

Whether the invariants checks for flambda are enabled

val spacetime : bool

Whether the compiler was configured for Spacetime profiling

val enable_call_counts : bool

Whether call counts are to be available when Spacetime profiling

val profinfo : bool

Whether the compiler was configured for profiling

val profinfo_width : int

How many bits are to be used in values' headers for profiling information

val libunwind_available : bool

Whether the libunwind library is available on the target

val libunwind_link_flags : string

Linker flags to use libunwind

val safe_string : bool

Whether the compiler was configured with -force-safe-string; in that case, the -unsafe-string compile-time option is unavailable

Since 4.05.0

val default_safe_string : bool

Whether the compiler was configured to use the -safe-string or -unsafe-string compile-time option by default.

Since 4.06.0

val flat_float_array : bool

Whether the compiler and runtime automagically flatten float arrays

val windows_unicode : bool

Whether Windows Unicode runtime is enabled

val afl_instrument : bool

Whether afl-fuzz instrumentation is generated by default

val print_config : out_channel -> unit

Access to configuration values

val config_var : string -> string option

the configuration value of a variable, if it exists