yocto-poky/meta/recipes-devtools/gcc/gcc-4.8/0027-cpp-honor-sysroot.patch

From a0f9bd09c816ad29ecf7c29d6c27f7df97710364 Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Fri, 29 Mar 2013 09:22:00 +0400
Subject: [PATCH 27/35] cpp: honor sysroot.

Currently, if the gcc toolchain is relocated and installed from sstate, then you try and compile
preprocessed source (.i or .ii files), the compiler will try and access the builtin sysroot location
rather than the --sysroot option specified on the commandline. If access to that directory is
permission denied (unreadable), gcc will error.

This happens when ccache is in use due to the fact it uses preprocessed source files.

The fix below adds %I to the cpp-output spec macro so the default substitutions for -iprefix,
-isystem, -isysroot happen and the correct sysroot is used.

[YOCTO #2074]

RP 2012/04/13

Signed-off-by: Khem Raj <raj.khem@gmail.com>

Upstream-Status: Pending
---
 gcc/cp/lang-specs.h |    2 +-
 gcc/gcc.c           |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/gcc/cp/lang-specs.h b/gcc/cp/lang-specs.h
index a001c3e..1aae1e4 100644
--- a/gcc/cp/lang-specs.h
+++ b/gcc/cp/lang-specs.h
@@ -63,5 +63,5 @@ along with GCC; see the file COPYING3.  If not see
   {".ii", "@c++-cpp-output", 0, 0, 0},
   {"@c++-cpp-output",
    "%{!M:%{!MM:%{!E:\
-    cc1plus -fpreprocessed %i %(cc1_options) %2\
+    cc1plus -fpreprocessed %i %I %(cc1_options) %2\
     %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
diff --git a/gcc/gcc.c b/gcc/gcc.c
index 51062aa..cf6b99e 100644
--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -1042,7 +1042,7 @@ static const struct compiler default_compilers[] =
                     %W{o*:--output-pch=%*}}%V}}}}}}", 0, 0, 0},
   {".i", "@cpp-output", 0, 0, 0},
   {"@cpp-output",
-   "%{!M:%{!MM:%{!E:cc1 -fpreprocessed %i %(cc1_options) %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
+   "%{!M:%{!MM:%{!E:cc1 -fpreprocessed %i %I %(cc1_options) %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
   {".s", "@assembler", 0, 0, 0},
   {"@assembler",
    "%{!M:%{!MM:%{!E:%{!S:as %(asm_debug) %(asm_options) %i %A }}}}", 0, 0, 0},
-- 
1.7.10.4