python: Fix cross compiling issue

If the target and host have the same type, the system
may try to execute the instructions from the target
version.  This can lead to illegal instructions
as well as the wrong copy of the code running.

Add CROSSPYTHONPATH for PYTHON_FOR_BUILD and export
the correct path to fix it.

(From OE-Core rev: 1cda7afd4173100e4185ee8759f6b2770bc93b72)

Signed-off-by: Jackie Huang <jackie.huang@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 32 insertions, 0 deletions

diff --git a/meta/recipes-devtools/python/python/add-CROSSPYTHONPATH-for-PYTHON_FOR_BUILD.patch b/meta/recipes-devtools/python/python/add-CROSSPYTHONPATH-for-PYTHON_FOR_BUILD.patch
new file mode 100644
index 0000000000..5ba54806eb
--- /dev/null
+++ b/meta/recipes-devtools/python/python/add-CROSSPYTHONPATH-for-PYTHON_FOR_BUILD.patch
@@ -0,0 +1,31 @@
+configure.ac: add CROSSPYTHONPATH into PYTHONPATH for PYTHON_FOR_BUILD
+
+When building x86->x86 the system will try to execute .so and related items
+from the default PYTHONPATH.  This will fail if the target CPU contains
+instructions that the host CPU does not have, add CROSSPYTHONPATH
+into PYTHONPATH so we can prepend the list to find correct libs.
+
+Upstream-Status: Inappropriate [OE-Core integration specific]
+
+Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
+Signed-off-by: Jackie Huang <jackie.huang@windriver.com>
+---
+ configure.ac | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+index 87a4f02..f20cc7b 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -33,7 +33,7 @@ if test "$cross_compiling" = yes; then
+            AC_MSG_ERROR([python$PACKAGE_VERSION interpreter not found])
+        fi
+         AC_MSG_RESULT($interp)
+-       PYTHON_FOR_BUILD='_PYTHON_PROJECT_BASE=$(abs_builddir) _PYTHON_HOST_PLATFORM=$(_PYTHON_HOST_PLATFORM) PYTHONPATH=$(shell test -f pybuilddir.txt && echo $(abs_builddir)/`cat pybuilddir.txt`:)$(srcdir)/Lib:$(srcdir)/Lib/plat-$(MACHDEP) '$interp
++       PYTHON_FOR_BUILD='_PYTHON_PROJECT_BASE=$(abs_builddir) _PYTHON_HOST_PLATFORM=$(_PYTHON_HOST_PLATFORM) PYTHONPATH=$(CROSSPYTHONPATH):$(shell test -f pybuilddir.txt && echo $(abs_builddir)/`cat pybuilddir.txt`:)$(srcdir)/Lib:$(srcdir)/Lib/plat-$(MACHDEP) '$interp
+     fi
+ elif test "$cross_compiling" = maybe; then
+     AC_MSG_ERROR([Cross compiling required --host=HOST-TUPLE and --build=ARCH])
+-- 
+2.5.0
+
diff --git a/meta/recipes-devtools/python/python_2.7.9.bb b/meta/recipes-devtools/python/python_2.7.9.bb
index bc20417674..f585a53d58 100644
--- a/meta/recipes-devtools/python/python_2.7.9.bb
+++ b/meta/recipes-devtools/python/python_2.7.9.bb
@@ -26,6 +26,7 @@ SRC_URI += "\
   file://parallel-makeinst-create-bindir.patch \
   file://use_sysroot_ncurses_instead_of_host.patch \
   file://avoid_parallel_make_races_on_pgen.patch \
+  file://add-CROSSPYTHONPATH-for-PYTHON_FOR_BUILD.patch \
 "
 
 S = "${WORKDIR}/Python-${PV}"