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181 lines
5.4 KiB
181 lines
5.4 KiB
commit 331735a357a73c7b8adc205241ac3cc6543d985e
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Author: Felix Fietkau <nbd@openwrt.org>
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Date: Tue Nov 17 12:38:22 2015 +0000
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gcc: add a patch to 5.x that supports translation of __FILE__ paths
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Signed-off-by: Felix Fietkau <nbd@openwrt.org>
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SVN-Revision: 47490
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Forward ported from attachment to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47047
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--- a/gcc/c-family/c-opts.c
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+++ b/gcc/c-family/c-opts.c
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@@ -588,6 +588,10 @@ c_common_handle_option (size_t scode, co
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add_path (xstrdup (arg), SYSTEM, 0, true);
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break;
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+ case OPT_iremap:
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+ add_cpp_remap_path (arg);
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+ break;
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+
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case OPT_iwithprefix:
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add_prefixed_path (arg, SYSTEM);
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break;
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--- a/gcc/c-family/c.opt
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+++ b/gcc/c-family/c.opt
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@@ -1825,6 +1825,10 @@ iquote
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C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
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-iquote <dir> Add <dir> to the end of the quote include path.
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+iremap
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+C ObjC C++ ObjC++ Joined Separate
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+-iremap <src:dst> Convert <src> to <dst> if it occurs as prefix in __FILE__.
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+
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iwithprefix
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C ObjC C++ ObjC++ Joined Separate
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-iwithprefix <dir> Add <dir> to the end of the system include path.
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--- a/gcc/doc/cpp.texi
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+++ b/gcc/doc/cpp.texi
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@@ -4272,6 +4272,7 @@ Refer to the GCC manual for full documen
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@c man begin SYNOPSIS
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cpp [@option{-D}@var{macro}[=@var{defn}]@dots{}] [@option{-U}@var{macro}]
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[@option{-I}@var{dir}@dots{}] [@option{-iquote}@var{dir}@dots{}]
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+ [@option{-iremap}@var{src}:@var{dst}]
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[@option{-M}|@option{-MM}] [@option{-MG}] [@option{-MF} @var{filename}]
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[@option{-MP}] [@option{-MQ} @var{target}@dots{}]
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[@option{-MT} @var{target}@dots{}]
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--- a/gcc/doc/cppopts.texi
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+++ b/gcc/doc/cppopts.texi
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@@ -220,6 +220,12 @@ extensions @samp{.i}, @samp{.ii} or @sam
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extensions that GCC uses for preprocessed files created by
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@option{-save-temps}.
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+@item -iremap @var{src}:@var{dst}
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+@opindex iremap
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+Replace the prefix @var{src} in __FILE__ with @var{dst} at expansion time.
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+This option can be specified more than once. Processing stops at the first
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+match.
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+
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@item -fdirectives-only
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@opindex fdirectives-only
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When preprocessing, handle directives, but do not expand macros.
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--- a/gcc/doc/invoke.texi
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+++ b/gcc/doc/invoke.texi
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@@ -11871,6 +11871,12 @@ by @option{-fplugin=@var{name}} instead
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@option{-fplugin=@var{path}/@var{name}.so}. This option is not meant
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to be used by the user, but only passed by the driver.
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+@item -iremap @var{src}:@var{dst}
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+@opindex iremap
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+Replace the prefix @var{src} in __FILE__ with @var{dst} at expansion time.
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+This option can be specified more than once. Processing stops at the first
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+match.
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+
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@item -L@var{dir}
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@opindex L
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Add directory @var{dir} to the list of directories to be searched
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--- a/libcpp/include/cpplib.h
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+++ b/libcpp/include/cpplib.h
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@@ -820,6 +820,9 @@ extern void cpp_set_lang (cpp_reader *,
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/* Set the include paths. */
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extern void cpp_set_include_chains (cpp_reader *, cpp_dir *, cpp_dir *, int);
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+/* Provide src:dst pair for __FILE__ remapping. */
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+extern void add_cpp_remap_path (const char *);
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+
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/* Call these to get pointers to the options, callback, and deps
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structures for a given reader. These pointers are good until you
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call cpp_finish on that reader. You can either edit the callbacks
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--- a/libcpp/macro.c
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+++ b/libcpp/macro.c
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@@ -227,6 +227,64 @@ static const char * const monthnames[] =
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"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
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};
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+static size_t remap_pairs;
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+static char **remap_src;
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+static char **remap_dst;
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+
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+void
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+add_cpp_remap_path (const char *arg)
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+{
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+ const char *arg_dst;
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+ size_t len;
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+
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+ arg_dst = strchr(arg, ':');
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+ if (arg_dst == NULL)
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+ {
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+ fprintf(stderr, "Invalid argument for -iremap\n");
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+ exit(1);
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+ }
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+
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+ len = arg_dst - arg;
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+ ++arg_dst;
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+
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+ remap_src = (char **) xrealloc(remap_src, sizeof(char *) * (remap_pairs + 1));
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+ remap_dst = (char **) xrealloc(remap_dst, sizeof(char *) * (remap_pairs + 1));
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+
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+ remap_src[remap_pairs] = (char *) xmalloc(len + 1);
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+ memcpy(remap_src[remap_pairs], arg, len);
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+ remap_src[remap_pairs][len] = '\0';
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+ remap_dst[remap_pairs] = xstrdup(arg_dst);
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+ ++remap_pairs;
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+}
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+
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+static const char *
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+cpp_remap_file (const char *arg, char **tmp_name)
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+{
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+ char *result;
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+ size_t i, len;
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+
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+ for (i = 0; i < remap_pairs; ++i)
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+ {
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+ len = strlen (remap_src[i]);
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+ if (strncmp (remap_src[i], arg, len))
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+ continue;
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+ if (arg[len] == '\0')
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+ return xstrdup (remap_dst[i]);
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+ if (arg[len] != '/')
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+ continue;
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+ arg += len;
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+ len = strlen (remap_dst[i]);
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+ result = (char *) xmalloc (len + strlen (arg) + 1);
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+ memcpy(result, remap_dst[i], len);
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+ strcpy(result + len, arg);
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+ *tmp_name = result;
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+
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+ return result;
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+ }
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+
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+ return arg;
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+}
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+
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/* Helper function for builtin_macro. Returns the text generated by
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a builtin macro. */
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const uchar *
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@@ -290,6 +348,7 @@ _cpp_builtin_macro_text (cpp_reader *pfi
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{
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unsigned int len;
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const char *name;
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+ char *tmp_name = NULL;
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uchar *buf;
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if (node->value.builtin == BT_FILE)
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@@ -301,6 +360,7 @@ _cpp_builtin_macro_text (cpp_reader *pfi
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if (!name)
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abort ();
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}
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+ name = cpp_remap_file (name, &tmp_name);
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len = strlen (name);
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buf = _cpp_unaligned_alloc (pfile, len * 2 + 3);
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result = buf;
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@@ -308,6 +368,7 @@ _cpp_builtin_macro_text (cpp_reader *pfi
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buf = cpp_quote_string (buf + 1, (const unsigned char *) name, len);
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*buf++ = '"';
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*buf = '\0';
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+ free (tmp_name);
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}
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break;
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