python2: Fix build with gcc8

(From OE-Core rev: 910f68c9c8dc26e12d28ef29e956af63d100f121)

(From OE-Core rev: 04c2d53ef48a09747d0577d9ec1ffa548d247615)

(From OE-Core rev: 9a3772e9411864301ca2799b4d5827476a6b7fcf)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Martin Hundebøll <martin@geanix.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Ross Burton 2018-07-30 23:59:06 +02:00 committed by Richard Purdie
parent 33bf568714
commit 094c364e4e
3 changed files with 45 additions and 0 deletions

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@ -17,6 +17,7 @@ SRC_URI += "\
file://builddir.patch \
file://parallel-makeinst-create-bindir.patch \
file://revert_use_of_sysconfigdata.patch \
file://fix-gc-alignment.patch \
"
S = "${WORKDIR}/Python-${PV}"

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@ -0,0 +1,43 @@
Upstream-Status: Submitted
Signed-off-by: Ross Burton <ross.burton@intel.com>
Fix for over-aligned GC info
Patch by Florian Weimer
See: https://bugzilla.redhat.com/show_bug.cgi?id=1540316
Upstream discussion: https://mail.python.org/pipermail/python-dev/2018-January/152000.html
diff --git a/Include/objimpl.h b/Include/objimpl.h
index 55e83eced6..aa906144dc 100644
--- a/Include/objimpl.h
+++ b/Include/objimpl.h
@@ -248,6 +248,18 @@ PyAPI_FUNC(PyVarObject *) _PyObject_GC_Resize(PyVarObject *, Py_ssize_t);
/* for source compatibility with 2.2 */
#define _PyObject_GC_Del PyObject_GC_Del
+/* Former over-aligned definition of PyGC_Head, used to compute the
+ size of the padding for the new version below. */
+union _gc_head;
+union _gc_head_old {
+ struct {
+ union _gc_head *gc_next;
+ union _gc_head *gc_prev;
+ Py_ssize_t gc_refs;
+ } gc;
+ long double dummy;
+};
+
/* GC information is stored BEFORE the object structure. */
typedef union _gc_head {
struct {
@@ -255,7 +267,8 @@ typedef union _gc_head {
union _gc_head *gc_prev;
Py_ssize_t gc_refs;
} gc;
- long double dummy; /* force worst-case alignment */
+ double dummy; /* force worst-case alignment */
+ char dummy_padding[sizeof(union _gc_head_old)];
} PyGC_Head;
extern PyGC_Head *_PyGC_generation0;

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@ -28,6 +28,7 @@ SRC_URI += "\
file://add-CROSSPYTHONPATH-for-PYTHON_FOR_BUILD.patch \
file://pass-missing-libraries-to-Extension-for-mul.patch \
file://support_SOURCE_DATE_EPOCH_in_py_compile_2.7.patch \
file://fix-gc-alignment.patch \
"
S = "${WORKDIR}/Python-${PV}"