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            strcat(child_name, "-win32");
#endif
            strcat(child_name, "-tcc");
            if (strcmp(argv[0], child_path)) {
                if (s->verbose > 0)
                    printf("tcc: using '%s'\n", child_name), fflush(stdout);
                execvp(argv[0] = child_path, argv);
            }
            tcc_error("'%s' not found", child_name);
        case 0: /* ignore -march etc. */
            break;
        default:
            tcc_warning("unsupported option \"-m%s\"", optarg);
    }
}
#else
#define exec_other_tcc(s, argv, optarg)
#endif

static void gen_makedeps(TCCState *s, const char *target, const char *filename)
{
    FILE *depout;
    char buf[1024], *ext;
    int i;

    if (!filename) {
        /* compute filename automatically
         * dir/file.o -> dir/file.d             */
        pstrcpy(buf, sizeof(buf), target);
        ext = tcc_fileextension(buf);
        pstrcpy(ext, sizeof(buf) - (ext-buf), ".d");
        filename = buf;
    }

    if (s->verbose)
        printf("<- %s\n", filename);

    /* XXX return err codes instead of error() ? */
    depout = fopen(filename, "w");
    if (!depout)
        tcc_error("could not open '%s'", filename);

    fprintf(depout, "%s : \\\n", target);
    for (i=0; i<s->nb_target_deps; ++i)
        fprintf(depout, " %s \\\n", s->target_deps[i]);
    fprintf(depout, "\n");
    fclose(depout);
}

static char *default_outputfile(TCCState *s, const char *first_file)
{
    char buf[1024];
    char *ext;
    const char *name = "a";

    if (first_file && strcmp(first_file, "-"))
        name = tcc_basename(first_file);
    pstrcpy(buf, sizeof(buf), name);
    ext = tcc_fileextension(buf);
#ifdef TCC_TARGET_PE
    if (s->output_type == TCC_OUTPUT_DLL)
        strcpy(ext, ".dll");
    else
    if (s->output_type == TCC_OUTPUT_EXE)
        strcpy(ext, ".exe");
    else
#endif
    if (( (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) ||
          (s->output_type == TCC_OUTPUT_PREPROCESS) )
        && *ext)
        strcpy(ext, ".o");
    else
        strcpy(buf, "a.out");

    return tcc_strdup(buf);
}

static void print_paths(const char *msg, char **paths, int nb_paths)
{
    int i;
    printf("%s:\n%s", msg, nb_paths ? "" : "  -\n");
    for(i = 0; i < nb_paths; i++)
        printf("  %s\n", paths[i]);
}

static void display_info(TCCState *s, int what)
{
    switch (what) {
    case 0:
        printf("tcc version %s ("
#ifdef TCC_TARGET_I386
        "i386"
# ifdef TCC_TARGET_PE
        " Win32"
# endif
#elif defined TCC_TARGET_X86_64
        "x86-64"
# ifdef TCC_TARGET_PE
        " Win64"
# endif
#elif defined TCC_TARGET_ARM
        "ARM"
# ifdef TCC_ARM_HARDFLOAT
        " Hard Float"
# endif
# ifdef TCC_TARGET_PE
        " WinCE"
# endif
#endif
#ifndef TCC_TARGET_PE
# ifdef __linux
        " Linux"
# endif
#endif
        ")\n", TCC_VERSION);
        break;
    case 1:
        printf("install: %s/\n", s->tcc_lib_path);
        /* print_paths("programs", NULL, 0); */
        print_paths("crt", s->crt_paths, s->nb_crt_paths);
        print_paths("libraries", s->library_paths, s->nb_library_paths);
        print_paths("include", s->sysinclude_paths, s->nb_sysinclude_paths);
        printf("elfinterp:\n  %s\n",  CONFIG_TCC_ELFINTERP);
        break;
    }
}

static int64_t getclock_us(void)
{
#ifdef _WIN32
    struct _timeb tb;
    _ftime(&tb);
    return (tb.time * 1000LL + tb.millitm) * 1000LL;
#else
    struct timeval tv;
    gettimeofday(&tv, NULL);
    return tv.tv_sec * 1000000LL + tv.tv_usec;
#endif
}

int main(int argc, char **argv)
{
    TCCState *s;
    int ret, optind, i, bench;
    int64_t start_time = 0;
    const char *first_file = NULL;

    s = tcc_new();
    s->output_type = TCC_OUTPUT_EXE;

    optind = tcc_parse_args(s, argc - 1, argv + 1);
    tcc_set_environment(s);

    if (optind == 0) {
        help();
        return 1;
    }

    if (s->option_m)
        exec_other_tcc(s, argv, s->option_m);

    if (s->verbose)
        display_info(s, 0);

    if (s->print_search_dirs || (s->verbose == 2 && optind == 1)) {
        tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
        display_info(s, 1);
        return 0;
    }

    if (s->verbose && optind == 1)
        return 0;

    if (s->nb_files == 0)
        tcc_error("no input files\n");

    /* check -c consistency : only single file handled. XXX: checks file type */
    if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) {
        if (s->nb_libraries != 0)
            tcc_error("cannot specify libraries with -c");
        /* accepts only a single input file */
        if (s->nb_files != 1)
            tcc_error("cannot specify multiple files with -c");
    }
    
    if (s->output_type == TCC_OUTPUT_PREPROCESS) {
        if (!s->outfile) {
            s->ppfp = stdout;
        } else {
            s->ppfp = fopen(s->outfile, "w");
            if (!s->ppfp)
                tcc_error("could not write '%s'", s->outfile);
        }
    }

    bench = s->do_bench;
    if (bench)
        start_time = getclock_us();

    tcc_set_output_type(s, s->output_type);

    /* compile or add each files or library */
    for(i = ret = 0; i < s->nb_files && ret == 0; i++) {
        const char *filename;

        filename = s->files[i];
        if (filename[0] == '-' && filename[1] == 'l') {
            if (tcc_add_library(s, filename + 2) < 0) {
                tcc_error_noabort("cannot find '%s'", filename);
                ret = 1;
            }
        } else {
            if (1 == s->verbose)
                printf("-> %s\n", filename);
            if (tcc_add_file(s, filename) < 0)
                ret = 1;
            if (!first_file)
                first_file = filename;
        }
    }

    if (0 == ret) {
        if (bench)
            tcc_print_stats(s, getclock_us() - start_time);

        if (s->output_type == TCC_OUTPUT_MEMORY) {
#ifdef TCC_IS_NATIVE
            ret = tcc_run(s, argc - 1 - optind, argv + 1 + optind);
#else
            tcc_error_noabort("-run is not available in a cross compiler");
            ret = 1;
#endif
        } else if (s->output_type == TCC_OUTPUT_PREPROCESS) {
             if (s->outfile)
                fclose(s->ppfp);
        } else {
            if (!s->outfile)
                s->outfile = default_outputfile(s, first_file);
            ret = !!tcc_output_file(s, s->outfile);
            /* dump collected dependencies */
            if (s->gen_deps && !ret)
                gen_makedeps(s, s->outfile, s->deps_outfile);
        }
    }

    tcc_delete(s);
    if (bench)
        tcc_memstats();
    return ret;
}