From: Hans-Peter Nilsson <hp@bitrange.com>
Date: Wed, 15 Oct 2014 01:03:59 +0000 (+0200)
Subject: If "=" is the first character in a ldscript input file, force a sysroot prefix.
X-Git-Tag: gdb-7.9.0-release~928
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=bfa234344327776fb3b16e8bfd9c8de6ec73ae31;p=external%2Fbinutils.git

If "=" is the first character in a ldscript input file, force a sysroot prefix.

	* ldlang.c (lang_add_input_file): If the first character in the
	filename is '=', prepend the sysroot and force the context of that
	input file to non-sysroot.

The "input_flags.sysrooted = 0" thing described in the comment is
covered by the testsuite part ("root-anchored =-prefixed script
inside"), but only observable for --with-sysroot configurations.
---

diff --git a/ld/ChangeLog b/ld/ChangeLog
index dd7c75e..49a0a66 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,5 +1,8 @@
 2014-10-15  Hans-Peter Nilsson  <hp@axis.com>
 
+	* ldlang.c (lang_add_input_file): If the first character in the
+	filename is '=', prepend the sysroot and force the context of that
+	input file to non-sysroot.
 	* ld.texinfo (Options): When mentioning "=" and sysroot, mention
 	that --sysroot controls it, not only through the configuration.
 	(input files in linker scripts): When mentioning
diff --git a/ld/ldlang.c b/ld/ldlang.c
index 5960e5c..c4da07f 100644
--- a/ld/ldlang.c
+++ b/ld/ldlang.c
@@ -1118,6 +1118,26 @@ lang_add_input_file (const char *name,
 		     lang_input_file_enum_type file_type,
 		     const char *target)
 {
+  if (name != NULL && *name == '=')
+    {
+      lang_input_statement_type *ret;
+      char *sysrooted_name
+	= concat (ld_sysroot, name + 1, (const char *) NULL);
+
+      /* We've now forcibly prepended the sysroot, making the input
+	 file independent of the context.  Therefore, temporarily
+	 force a non-sysrooted context for this statement, so it won't
+	 get the sysroot prepended again when opened.  (N.B. if it's a
+	 script, any child nodes with input files starting with "/"
+	 will be handled as "sysrooted" as they'll be found to be
+	 within the sysroot subdirectory.)  */
+      unsigned int outer_sysrooted = input_flags.sysrooted;
+      input_flags.sysrooted = 0;
+      ret = new_afile (sysrooted_name, file_type, target, TRUE);
+      input_flags.sysrooted = outer_sysrooted;
+      return ret;
+    }
+
   return new_afile (name, file_type, target, TRUE);
 }