+++ /dev/null
-Forward ported from attachment to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47047
-
---- a/gcc/c-family/c-opts.c
-+++ b/gcc/c-family/c-opts.c
-@@ -581,6 +581,10 @@ c_common_handle_option (size_t scode, co
- add_path (xstrdup (arg), SYSTEM, 0, true);
- break;
-
-+ case OPT_iremap:
-+ add_cpp_remap_path (arg);
-+ break;
-+
- case OPT_iwithprefix:
- add_prefixed_path (arg, SYSTEM);
- break;
---- a/gcc/c-family/c.opt
-+++ b/gcc/c-family/c.opt
-@@ -1528,6 +1528,10 @@ iquote
- C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
- -iquote <dir> Add <dir> to the end of the quote include path
-
-+iremap
-+C ObjC C++ ObjC++ Joined Separate
-+-iremap <src:dst> Convert <src> to <dst> if it occurs as prefix in __FILE__.
-+
- iwithprefix
- C ObjC C++ ObjC++ Joined Separate
- -iwithprefix <dir> Add <dir> to the end of the system include path
---- a/gcc/doc/cpp.texi
-+++ b/gcc/doc/cpp.texi
-@@ -4441,6 +4441,7 @@ without notice.
- @c man begin SYNOPSIS
- cpp [@option{-D}@var{macro}[=@var{defn}]@dots{}] [@option{-U}@var{macro}]
- [@option{-I}@var{dir}@dots{}] [@option{-iquote}@var{dir}@dots{}]
-+ [@option{-iremap}@var{src}:@var{dst}]
- [@option{-W}@var{warn}@dots{}]
- [@option{-M}|@option{-MM}] [@option{-MG}] [@option{-MF} @var{filename}]
- [@option{-MP}] [@option{-MQ} @var{target}@dots{}]
---- a/gcc/doc/cppopts.texi
-+++ b/gcc/doc/cppopts.texi
-@@ -532,6 +532,12 @@ Search @var{dir} only for header files r
- If @var{dir} begins with @code{=}, then the @code{=} will be replaced
- by the sysroot prefix; see @option{--sysroot} and @option{-isysroot}.
-
-+@item -iremap @var{src}:@var{dst}
-+@opindex iremap
-+Replace the prefix @var{src} in __FILE__ with @var{dst} at expansion time.
-+This option can be specified more than once. Processing stops at the first
-+match.
-+
- @item -fdirectives-only
- @opindex fdirectives-only
- When preprocessing, handle directives, but do not expand macros.
---- a/gcc/doc/invoke.texi
-+++ b/gcc/doc/invoke.texi
-@@ -494,8 +494,8 @@ Objective-C and Objective-C++ Dialects}.
- @item Directory Options
- @xref{Directory Options,,Options for Directory Search}.
- @gccoptlist{-B@var{prefix} -I@var{dir} -iplugindir=@var{dir} @gol
---iquote@var{dir} -L@var{dir} -specs=@var{file} -I- @gol
----sysroot=@var{dir} --no-sysroot-suffix}
-+-iquote@var{dir} -iremap@var{src}:@var{dst} -L@var{dir} -specs=@var{file} @gol
-+-I- --sysroot=@var{dir} --no-sysroot-suffix}
-
- @item Machine Dependent Options
- @xref{Submodel Options,,Hardware Models and Configurations}.
-@@ -11463,6 +11463,12 @@ be searched for header files only for th
- "@var{file}"}; they are not searched for @code{#include <@var{file}>},
- otherwise just like @option{-I}.
-
-+@item -iremap @var{src}:@var{dst}
-+@opindex iremap
-+Replace the prefix @var{src} in __FILE__ with @var{dst} at expansion time.
-+This option can be specified more than once. Processing stops at the first
-+match.
-+
- @item -L@var{dir}
- @opindex L
- Add directory @var{dir} to the list of directories to be searched
---- a/libcpp/include/cpplib.h
-+++ b/libcpp/include/cpplib.h
-@@ -751,6 +751,9 @@ extern void cpp_set_lang (cpp_reader *,
- /* Set the include paths. */
- extern void cpp_set_include_chains (cpp_reader *, cpp_dir *, cpp_dir *, int);
-
-+/* Provide src:dst pair for __FILE__ remapping. */
-+extern void add_cpp_remap_path (const char *);
-+
- /* Call these to get pointers to the options, callback, and deps
- structures for a given reader. These pointers are good until you
- call cpp_finish on that reader. You can either edit the callbacks
---- a/libcpp/macro.c
-+++ b/libcpp/macro.c
-@@ -224,6 +224,64 @@ static const char * const monthnames[] =
- "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
- };
-
-+static size_t remap_pairs;
-+static char **remap_src;
-+static char **remap_dst;
-+
-+void
-+add_cpp_remap_path (const char *arg)
-+{
-+ const char *arg_dst;
-+ size_t len;
-+
-+ arg_dst = strchr(arg, ':');
-+ if (arg_dst == NULL)
-+ {
-+ fprintf(stderr, "Invalid argument for -iremap\n");
-+ exit(1);
-+ }
-+
-+ len = arg_dst - arg;
-+ ++arg_dst;
-+
-+ remap_src = (char **) xrealloc(remap_src, sizeof(char *) * (remap_pairs + 1));
-+ remap_dst = (char **) xrealloc(remap_dst, sizeof(char *) * (remap_pairs + 1));
-+
-+ remap_src[remap_pairs] = (char *) xmalloc(len + 1);
-+ memcpy(remap_src[remap_pairs], arg, len);
-+ remap_src[remap_pairs][len] = '\0';
-+ remap_dst[remap_pairs] = xstrdup(arg_dst);
-+ ++remap_pairs;
-+}
-+
-+static const char *
-+cpp_remap_file (const char *arg, char **tmp_name)
-+{
-+ char *result;
-+ size_t i, len;
-+
-+ for (i = 0; i < remap_pairs; ++i)
-+ {
-+ len = strlen (remap_src[i]);
-+ if (strncmp (remap_src[i], arg, len))
-+ continue;
-+ if (arg[len] == '\0')
-+ return xstrdup (remap_dst[i]);
-+ if (arg[len] != '/')
-+ continue;
-+ arg += len;
-+ len = strlen (remap_dst[i]);
-+ result = (char *) xmalloc (len + strlen (arg) + 1);
-+ memcpy(result, remap_dst[i], len);
-+ strcpy(result + len, arg);
-+ *tmp_name = result;
-+
-+ return result;
-+ }
-+
-+ return arg;
-+}
-+
- /* Helper function for builtin_macro. Returns the text generated by
- a builtin macro. */
- const uchar *
-@@ -286,6 +344,7 @@ _cpp_builtin_macro_text (cpp_reader *pfi
- {
- unsigned int len;
- const char *name;
-+ char *tmp_name = NULL;
- uchar *buf;
-
- if (node->value.builtin == BT_FILE)
-@@ -297,6 +356,7 @@ _cpp_builtin_macro_text (cpp_reader *pfi
- if (!name)
- abort ();
- }
-+ name = cpp_remap_file (name, &tmp_name);
- len = strlen (name);
- buf = _cpp_unaligned_alloc (pfile, len * 2 + 3);
- result = buf;
-@@ -304,6 +364,7 @@ _cpp_builtin_macro_text (cpp_reader *pfi
- buf = cpp_quote_string (buf + 1, (const unsigned char *) name, len);
- *buf++ = '"';
- *buf = '\0';
-+ free (tmp_name);
- }
- break;
-
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