gcc-4.7: Let cpp specs honor include searches in relocated install tree

Fix from Yocto Bug 2074

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

2 files changed, 46 insertions, 0 deletions

diff --git a/meta/recipes-devtools/gcc/gcc-4.7.inc b/meta/recipes-devtools/gcc/gcc-4.7.inc
index 7cfc388b7..784a3be32 100644
--- a/meta/recipes-devtools/gcc/gcc-4.7.inc
+++ b/meta/recipes-devtools/gcc/gcc-4.7.inc
@@ -63,6 +63,7 @@ SRC_URI = "svn://gcc.gnu.org/svn/gcc/branches;module=${BRANCH};proto=http \
 	   file://pr32219.patch \
 	   file://fortran-cross-compile-hack.patch \
 	   file://libgcc-sjlj-check.patch \
+	   file://cpp-honor-sysroot.patch \
 	  "
 
 S = "${TMPDIR}/work-shared/gcc-${PV}-${PR}/${BRANCH}"
@@ -103,6 +104,11 @@ EXTRA_OECONF_INTERMEDIATE = "--disable-libmudflap \
 
 EXTRA_OECONF_append_libc-uclibc = " --disable-decimal-float "
 
+EXTRA_OECONF_PATHS = " \ 
+                      --with-gxx-include-dir=${STAGING_DIR_TARGET}${target_includedir}/c++ \ 
+                      --with-sysroot=${STAGING_DIR_TARGET} \ 
+                      --with-build-sysroot=${STAGING_DIR_TARGET}"
+
 do_configure_prepend () {
         # teach gcc to find correct target includedir when checking libc ssp support
         mkdir -p ${B}/gcc
diff --git a/meta/recipes-devtools/gcc/gcc-4.7/cpp-honor-sysroot.patch b/meta/recipes-devtools/gcc/gcc-4.7/cpp-honor-sysroot.patch
new file mode 100644
index 000000000..731067741
--- /dev/null
+++ b/meta/recipes-devtools/gcc/gcc-4.7/cpp-honor-sysroot.patch
@@ -0,0 +1,40 @@
+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]
+
+Upstream-Status: Pending
+
+RP 2012/04/13
+
+Index: gcc-4_6-branch/gcc/gcc.c
+===================================================================
+--- gcc-4_6-branch.orig/gcc/gcc.c	2012-04-13 12:24:37.939671140 +0000
++++ gcc-4_6-branch/gcc/gcc.c	2012-04-13 12:24:54.439670688 +0000
+@@ -953,7 +953,7 @@
+                     %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},
+Index: gcc-4_6-branch/gcc/cp/lang-specs.h
+===================================================================
+--- gcc-4_6-branch.orig/gcc/cp/lang-specs.h	2012-04-13 12:25:01.019670594 +0000
++++ gcc-4_6-branch/gcc/cp/lang-specs.h	2012-04-13 12:25:07.567670180 +0000
+@@ -64,5 +64,5 @@
+   {".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},