On Sun, Aug 31, 2014 at 4:51 PM, Andi Kleen <a...@firstfloor.org> wrote: > From: Andi Kleen <a...@linux.intel.com> > > To use gcc-{ar,ranlib} for boot strap we need to add a -B option > to the tool. Since ar has weird and unusual argument conventions > implement the code by hand instead of using any libraries. > > v2: Fix typo > v3: Improve comments. Use strlen. Use DIR_SEPARATOR. Add prefixes at > begin.
Ok. Thanks, Richard. > gcc/: > > 2014-08-31 Andi Kleen <a...@linux.intel.com> > > * file-find.c (add_prefix_begin): Add. > (do_add_prefix): Rename from add_prefix with first argument. > (add_prefix): Add new wrapper. > * file-find.h (add_prefix_begin): Add. > * gcc-ar.c (main): Support -B option. > --- > gcc/file-find.c | 23 ++++++++++++++++++++--- > gcc/file-find.h | 1 + > gcc/gcc-ar.c | 43 +++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 64 insertions(+), 3 deletions(-) > > diff --git a/gcc/file-find.c b/gcc/file-find.c > index 87d486d..be608b2 100644 > --- a/gcc/file-find.c > +++ b/gcc/file-find.c > @@ -105,15 +105,16 @@ find_a_file (struct path_prefix *pprefix, const char > *name, int mode) > return 0; > } > > -/* Add an entry for PREFIX to prefix list PPREFIX. */ > +/* Add an entry for PREFIX to prefix list PREFIX. > + Add at beginning if FIRST is true. */ > > void > -add_prefix (struct path_prefix *pprefix, const char *prefix) > +do_add_prefix (struct path_prefix *pprefix, const char *prefix, bool first) > { > struct prefix_list *pl, **prev; > int len; > > - if (pprefix->plist) > + if (pprefix->plist && !first) > { > for (pl = pprefix->plist; pl->next; pl = pl->next) > ; > @@ -138,6 +139,22 @@ add_prefix (struct path_prefix *pprefix, const char > *prefix) > *prev = pl; > } > > +/* Add an entry for PREFIX at the end of prefix list PREFIX. */ > + > +void > +add_prefix (struct path_prefix *pprefix, const char *prefix) > +{ > + do_add_prefix (pprefix, prefix, false); > +} > + > +/* Add an entry for PREFIX at the begin of prefix list PREFIX. */ > + > +void > +add_prefix_begin (struct path_prefix *pprefix, const char *prefix) > +{ > + do_add_prefix (pprefix, prefix, true); > +} > + > /* Take the value of the environment variable ENV, break it into a path, and > add of the entries to PPREFIX. */ > > diff --git a/gcc/file-find.h b/gcc/file-find.h > index b438056..0754d99 100644 > --- a/gcc/file-find.h > +++ b/gcc/file-find.h > @@ -40,6 +40,7 @@ struct path_prefix > extern void find_file_set_debug (bool); > extern char *find_a_file (struct path_prefix *, const char *, int); > extern void add_prefix (struct path_prefix *, const char *); > +extern void add_prefix_begin (struct path_prefix *, const char *); > extern void prefix_from_env (const char *, struct path_prefix *); > extern void prefix_from_string (const char *, struct path_prefix *); > > diff --git a/gcc/gcc-ar.c b/gcc/gcc-ar.c > index aebaa92..b5199e6 100644 > --- a/gcc/gcc-ar.c > +++ b/gcc/gcc-ar.c > @@ -132,9 +132,52 @@ main (int ac, char **av) > const char **nargv; > bool is_ar = !strcmp (PERSONALITY, "ar"); > int exit_code = FATAL_EXIT_CODE; > + int i; > > setup_prefixes (av[0]); > > + /* Not using getopt for now. */ > + for (i = 0; i < ac; i++) > + if (!strncmp (av[i], "-B", 2)) > + { > + const char *arg = av[i] + 2; > + const char *end; > + size_t len; > + > + memmove (av + i, av + i + 1, sizeof (char *) * ((ac + 1) - i)); > + ac--; > + if (*arg == 0) > + { > + arg = av[i + 1]; > + if (!arg) > + { > + fprintf (stderr, "Usage: gcc-ar [-B prefix] ar arguments > ...\n"); > + exit (EXIT_FAILURE); > + } > + memmove (av + i, av + i + 1, sizeof (char *) * ((ac + 1) - i)); > + ac--; > + i++; > + } > + /* else it's a joined argument */ > + > + len = strlen (arg); > + if (len > 0) > + len--; > + end = arg + len; > + > + /* Always add a dir separator for the prefix list. */ > + if (end > arg && !IS_DIR_SEPARATOR (*end)) > + { > + static const char dir_separator_str[] = { DIR_SEPARATOR, 0 }; > + arg = concat (arg, dir_separator_str, NULL); > + } > + > + add_prefix_begin (&path, arg); > + add_prefix_begin (&target_path, arg); > + break; > + } > + > + > /* Find the GCC LTO plugin */ > plugin = find_a_file (&target_path, LTOPLUGINSONAME, R_OK); > if (!plugin) > -- > 2.0.4 >