Fix Python 3.7 breakage (RH BZ 1577396).

Resolves: rhbz#1577396

_gdb.spec.Patch.include

@@ -512,3 +512,7 @@ Patch122: gdb-rhbz1553104-s390x-arch12-test.patch
 # This patch should be removed on the next rebase.
 Patch123: gdb-aarch64-guard-sve-macros.patch
 
+# Fix build breakage with Python 3.7
+# RHBZ #1577396
+Patch124: gdb-fix-python37-breakage.patch
+

_gdb.spec.patch.include

@@ -121,3 +121,4 @@
 %patch121 -p1
 %patch122 -p1
 %patch123 -p1
+%patch124 -p1

_patch_order

@@ -121,3 +121,4 @@ gdb-archer.patch
 gdb-vla-intel-fix-print-char-array.patch
 gdb-rhbz1553104-s390x-arch12-test.patch
 gdb-aarch64-guard-sve-macros.patch
+gdb-fix-python37-breakage.patch

gdb-fix-python37-breakage.patch

@@ -0,0 +1,68 @@
+From FEDORA_PATCHES Mon Sep 17 00:00:00 2001
+From: Paul Koning <paul_koning@dell.com>
+Date: Fri, 8 Jun 2018 13:26:36 -0400
+Subject: gdb-fix-python37-breakage.patch
+
+FileName: gdb-fix-python37-breakage.patch
+
+;; Fix build breakage with Python 3.7
+;; RHBZ #1577396
+
+Fix build issue with Python 3.7
+
+Originally reported in
+https://bugzilla.redhat.com/show_bug.cgi?id=1577396 -- gdb build fails
+with Python 3.7 due to references to a Python internal function whose
+declaration changed in 3.7.
+
+gdb/ChangeLog
+2018-06-08  Paul Koning  <paul_koning@dell.com>
+
+	    PR gdb/23252
+
+	    * python/python.c (do_start_initialization):
+	    Avoid call to internal Python API.
+	    (init__gdb_module): New function.
+
+diff --git a/gdb/python/python.c b/gdb/python/python.c
+--- a/gdb/python/python.c
++++ b/gdb/python/python.c
+@@ -1810,6 +1810,17 @@ finalize_python (void *ignore)
+   restore_active_ext_lang (previous_active);
+ }
+ 
++#ifdef IS_PY3K
++/* This is called via the PyImport_AppendInittab mechanism called
++   during initialization, to make the built-in _gdb module known to
++   Python.  */
++PyMODINIT_FUNC
++init__gdb_module (void)
++{
++  return PyModule_Create (&python_GdbModuleDef);
++}
++#endif
++
+ static bool
+ do_start_initialization ()
+ {
+@@ -1850,6 +1861,9 @@ do_start_initialization ()
+      remain alive for the duration of the program's execution, so
+      it is not freed after this call.  */
+   Py_SetProgramName (progname_copy);
++
++  /* Define _gdb as a built-in module.  */
++  PyImport_AppendInittab ("_gdb", init__gdb_module);
+ #else
+   Py_SetProgramName (progname.release ());
+ #endif
+@@ -1859,9 +1873,7 @@ do_start_initialization ()
+   PyEval_InitThreads ();
+ 
+ #ifdef IS_PY3K
+-  gdb_module = PyModule_Create (&python_GdbModuleDef);
+-  /* Add _gdb module to the list of known built-in modules.  */
+-  _PyImport_FixupBuiltin (gdb_module, "_gdb");
++  gdb_module = PyImport_ImportModule ("_gdb");
+ #else
+   gdb_module = Py_InitModule ("_gdb", python_GdbMethods);
+ #endif

gdb.spec

@@ -26,7 +26,7 @@ Version: 8.1.50.%{snapsrc}
 
 # The release always contains a leading reserved number, start it at 1.
 # `upstream' is not a part of `name' to stay fully rpm dependencies compatible for the testing.
-Release: 17%{?dist}
+Release: 18%{?dist}
 
 License: GPLv3+ and GPLv3+ with exceptions and GPLv2+ and GPLv2+ with exceptions and GPL+ and LGPLv2+ and LGPLv3+ and BSD and Public Domain and GFDL
 Group: Development/Debuggers
@@ -1026,6 +1026,9 @@ then
 fi
 
 %changelog
+* Fri Jun  8 2018 Sergio Durigan Junior <sergiodj@redhat.com> - 8.1.50.20180605-18.fc29
+- Fix Python 3.7 breakage (RH BZ 1577396).
+
 * Tue Jun  5 2018 Sergio Durigan Junior <sergiodj@redhat.com> - 8.1.50.20180605-17.fc29
 - Rebase to FSF GDB 8.1.50.20180605 (8.2pre).