6bb1cadd56
that builds the following additional llvm/clang tools: - bugpoint - llc - lli - llvm-ar - llvm-as - llvm-bcanalyzer - llvm-diff - llvm-dis - llvm-extract - llvm-ld - llvm-link - llvm-mc - llvm-nm - llvm-objdump - llvm-prof - llvm-ranlib - llvm-rtdyld - llvm-stub - macho-dump - opt These tools are mainly useful for people that want to manipulate llvm bitcode (.bc) and llvm assembly language (.ll) files, or want to tinker with llvm and clang themselves. MFC after: 2 weeks
78 lines
2.6 KiB
C
78 lines
2.6 KiB
C
/*===- llvm-stub.c - Stub executable to run llvm bitcode files ------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This tool is used by the gccld program to enable transparent execution of
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// bitcode files by the user. Specifically, gccld outputs two files when asked
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// to compile a <program> file:
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// 1. It outputs the LLVM bitcode file to <program>.bc
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// 2. It outputs a stub executable that runs lli on <program>.bc
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//
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// This allows the end user to just say ./<program> and have the JIT executed
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// automatically. On unix, the stub executable emitted is actually a bourne
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// shell script that does the forwarding. Windows does not like #!/bin/sh
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// programs in .exe files, so we make it an actual program, defined here.
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//
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//===----------------------------------------------------------------------===*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "llvm/Config/config.h"
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#if defined(HAVE_UNISTD_H) && !defined(_MSC_VER)
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#include <unistd.h>
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#endif
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#ifdef _WIN32
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#include <process.h>
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#include <io.h>
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#endif
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int main(int argc, char** argv) {
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const char *Interp = getenv("LLVMINTERP");
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const char **Args;
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if (Interp == 0) Interp = "lli";
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/* Set up the command line options to pass to the JIT. */
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Args = (const char**)malloc(sizeof(char*) * (argc+2));
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/* argv[0] is the JIT */
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Args[0] = Interp;
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#ifdef LLVM_ON_WIN32
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{
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int len = strlen(argv[0]);
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if (len < 4 || strcmp(argv[0] + len - 4, ".exe") != 0) {
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/* .exe suffix is stripped off of argv[0] if the executable was run on the
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* command line without one. Put it back on.
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*/
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argv[0] = strcat(strcpy((char*)malloc(len + 5), argv[0]), ".exe");
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}
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}
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#endif
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/* argv[1] is argv[0] + ".bc". */
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Args[1] = strcat(strcpy((char*)malloc(strlen(argv[0])+4), argv[0]), ".bc");
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/* The rest of the args are as before. */
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memcpy((char **)Args+2, argv+1, sizeof(char*)*argc);
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/* Run the JIT. */
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#if !defined(_WIN32) || defined(__MINGW64__)
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execvp(Interp, (char **)Args); /* POSIX execvp takes a char *const[]. */
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#else
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execvp(Interp, Args); /* windows execvp takes a const char *const *. */
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#endif
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/* if _execv returns, the JIT could not be started. */
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fprintf(stderr, "Could not execute the LLVM JIT. Either add 'lli' to your"
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" path, or set the\ninterpreter you want to use in the LLVMINTERP "
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"environment variable.\n");
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return 1;
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}
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