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182 lines
5.7 KiB
182 lines
5.7 KiB
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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@@ -581,6 +581,10 @@ 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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@@ -1528,6 +1528,10 @@ 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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@@ -4441,6 +4441,7 @@ without notice.
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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{-W}@var{warn}@dots{}]
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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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--- a/gcc/doc/cppopts.texi
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+++ b/gcc/doc/cppopts.texi
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@@ -532,6 +532,12 @@ Search @var{dir} only for header files r
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If @var{dir} begins with @code{=}, then the @code{=} will be replaced
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by the sysroot prefix; see @option{--sysroot} and @option{-isysroot}.
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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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@@ -494,8 +494,8 @@ Objective-C and Objective-C++ Dialects}.
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@item Directory Options
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@xref{Directory Options,,Options for Directory Search}.
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@gccoptlist{-B@var{prefix} -I@var{dir} -iplugindir=@var{dir} @gol
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--iquote@var{dir} -L@var{dir} -specs=@var{file} -I- @gol
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---sysroot=@var{dir} --no-sysroot-suffix}
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+-iquote@var{dir} -iremap@var{src}:@var{dst} -L@var{dir} -specs=@var{file} @gol
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+-I- --sysroot=@var{dir} --no-sysroot-suffix}
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@item Machine Dependent Options
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@xref{Submodel Options,,Hardware Models and Configurations}.
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@@ -11479,6 +11479,12 @@ be searched for header files only for th
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"@var{file}"}; they are not searched for @code{#include <@var{file}>},
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otherwise just like @option{-I}.
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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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@@ -751,6 +751,9 @@ 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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@@ -224,6 +224,64 @@ 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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@@ -286,6 +344,7 @@ _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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@@ -297,6 +356,7 @@ _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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@@ -304,6 +364,7 @@ _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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