Hello all,
Wanted to leave this note for anybody running into gcc8 compiling issues.
This was built on archlinux using their gcc 8.1.0-1 package. Fortunately
there are fixes floating around, please see attached patches.
- Python-2.7.14
Error (sorry for the lack of details, lost the log file:-/ ):
/bin/sh: line 5: 25857 Segmentation fault (core dumped) ...
Fix:
Place attached patch gcc8_python.patch (also available at [1]) under
$SAGEDIR/build/pkgs/python2/patches. I guess this is now fixed at 2.7.15,
see [2].
- linbox-1.5.2
Error:
../../linbox/matrix/densematrix/blas-transposed-matrix.h:74:8: error: too
many template-parameter-lists
class TransposedBlasMatrix< TransposedBlasMatrix< Matrix > > : public
Matrix {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Fix:
Place attached patch gcc8_linbox.patch (also available at [3]) under
$SAGEDIR/build/pkgs/linbox/patches
Best,
f
[1]: https://mail.python.org/pipermail/python-dev/2018-January/152011.html
[2]:
https://github.com/python/cpython/commit/0b91f8a668201fc58fa732b8acc496caedfdbae0
[3]:
https://git.archlinux.org/svntogit/community.git/tree/trunk/linbox-gcc8.patch?h=packages/linbox
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--- linbox-1.5.2/linbox/matrix/densematrix/blas-transposed-matrix.h.orig 2018-05-06 10:35:33.852181382 +0000
+++ linbox-1.5.2/linbox/matrix/densematrix/blas-transposed-matrix.h 2018-05-06 10:35:59.598847558 +0000
@@ -67,9 +67,6 @@
/*! TransposedBlasMatrix.
* NO DOC
*/
-#if !defined(__INTEL_COMPILER) && !defined(__CUDACC__) & !defined(__clang__)
- template <>
-#endif
template< class Matrix >
class TransposedBlasMatrix< TransposedBlasMatrix< Matrix > > : public Matrix {
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;
