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72 lines
3.0 KiB
OCaml
72 lines
3.0 KiB
OCaml
(*
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* Copyright (C) 2011-2016 Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*)
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open Unix
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open Printf
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open Util
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(* for compat of OCaml before version 4.02.0 *)
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module Bytes = String
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(* Run a command and return its results as a process_status*string. *)
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let read_process (command : string) : Unix.process_status * string =
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let buffer_size = 2048 in
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let buffer = Buffer.create buffer_size in
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let str = Bytes.create buffer_size in
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let in_channel = Unix.open_process_in command in
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let chars_read = ref 1 in
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while !chars_read <> 0 do
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chars_read := input in_channel str 0 buffer_size;
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Buffer.add_substring buffer str 0 !chars_read
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done;
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let status = Unix.close_process_in in_channel in
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let output = Buffer.contents buffer in
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( status, output )
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(*Return None if gcc not found, caller should handle it*)
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let processor_macro ( full_path : string) : string option=
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let gcc_path = snd (read_process "which gcc") in
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if not (String.contains gcc_path '/' ) then
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(eprintf "warning: preprocessor is not found\n"; None)
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else
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let command = sprintf "gcc -x c -E -P \"%s\" 2>/dev/null" full_path in
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let output = read_process command in
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match fst output with
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| WEXITED exit_status ->
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if exit_status < 0 then
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failwithf "gcc exited with error code 0x%d\n" exit_status
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else if exit_status > 0 then
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failwithf "Preprocessor failed\n"
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else
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Some(snd output)
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| _ -> failwithf "Preprocessor stopped by signal\n"
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