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built atop the C language bindings, and user programs can link with them as such: # Bytecode ocamlc -cc g++ llvm.cma llvmbitwriter.cma -o example example.ml # Native ocamlopt -cc g++ llvm.cmxa llvmbitwriter.cmxa -o example.opt example.ml The vmcore.ml test exercises most/all of the APIs thus far bound. Unfortunately, they're not yet numerous enough to write hello world. But: $ cat example.ml (* example.ml *) open Llvm open Llvm_bitwriter let _ = let filename = Sys.argv.(1) in let m = create_module filename in let v = make_int_constant i32_type 42 false in let g = define_global "hello_world" v m in if not (write_bitcode_file m filename) then exit 1; dispose_module m; $ ocamlc -cc g++ llvm.cma llvm_bitwriter.cma -o example example.ml File "example.ml", line 11, characters 6-7: Warning Y: unused variable g. $ ./example example.bc $ llvm-dis < example.bc ; ModuleID = '<stdin>' @hello_world = global i32 42 ; <i32*> [#uses=0] The ocaml test cases provide effective tests for the C interfaces. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42093 91177308-0d34-0410-b5e6-96231b3b80d8
32 lines
1.7 KiB
C
32 lines
1.7 KiB
C
/*===-- bitwriter_ocaml.c - LLVM Ocaml Glue ---------------------*- C++ -*-===*\
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|* *|
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|* The LLVM Compiler Infrastructure *|
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|* *|
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|* This file was developed by Gordon Henriksen and is distributed under the *|
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|* University of Illinois Open Source License. See LICENSE.TXT for details. *|
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|* *|
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|*===----------------------------------------------------------------------===*|
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|* *|
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|* This file glues LLVM's ocaml interface to its C interface. These functions *|
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|* are by and large transparent wrappers to the corresponding C functions. *|
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|* *|
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|* Note that these functions intentionally take liberties with the CAMLparamX *|
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|* macros, since most of the parameters are not GC heap objects. *|
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|* *|
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\*===----------------------------------------------------------------------===*/
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#include "llvm-c/BitWriter.h"
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#include "llvm-c/Core.h"
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#include "caml/alloc.h"
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#include "caml/mlvalues.h"
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#include "caml/memory.h"
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/*===-- Modules -----------------------------------------------------------===*/
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/* Llvm.llmodule -> string -> bool */
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CAMLprim value llvm_write_bitcode_file(value M, value Path) {
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CAMLparam1(Path);
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int res = LLVMWriteBitcodeToFile((LLVMModuleRef) M, String_val(Path));
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CAMLreturn(Val_bool(res == 0));
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}
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