python: Fix PGEN linking errors

Parallel make races when linking PGEN affects target's python
compilation as well, adds patch from python-native to modify the
Makefile and avoid parallel make races, also updates upstream status

(From OE-Core rev: 4f0d1015aa3331ae7b376f836d3188b6017abfb1)

Signed-off-by: Alejandro Hernandez <alejandro.hernandez@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 27 insertions, 0 deletions

diff --git a/meta/recipes-devtools/python/python/avoid_parallel_make_races_on_pgen.patch b/meta/recipes-devtools/python/python/avoid_parallel_make_races_on_pgen.patch
new file mode 100644
index 0000000000..e9bae324f7
--- /dev/null
+++ b/meta/recipes-devtools/python/python/avoid_parallel_make_races_on_pgen.patch
@@ -0,0 +1,27 @@
+Upstream-Status: Pending
+
+Avoids parallel make races linking errors when making Parser/PGEN
+
+- Implements Richard Purdie's idea
+
+Signed-Off-By: Richard Purdie <richard.purdie@linuxfoundation.org>
+Signed-Off-By: Alejandro Hernandez <alejandro.hernandez@linux.intel.com>
+
+Index: Python-2.7.9/Makefile.pre.in
+===================================================================
+--- Python-2.7.9.orig/Makefile.pre.in
++++ Python-2.7.9/Makefile.pre.in
+@@ -611,12 +611,10 @@ Modules/grpmodule.o: $(srcdir)/Modules/g
+ 
+ Modules/pwdmodule.o: $(srcdir)/Modules/pwdmodule.c $(srcdir)/Modules/posixmodule.h
+ 
+-$(GRAMMAR_H): $(GRAMMAR_INPUT) $(PGENSRCS)
++$(GRAMMAR_H): $(GRAMMAR_INPUT) $(PGENSRCS) $(PGEN)
+                @$(MKDIR_P) Include
+-               $(MAKE) $(PGEN)
+                $(HOSTPGEN) $(GRAMMAR_INPUT) $(GRAMMAR_H) $(GRAMMAR_C)
+ $(GRAMMAR_C): $(GRAMMAR_H) $(GRAMMAR_INPUT) $(PGENSRCS)
+-               $(MAKE) $(GRAMMAR_H)
+                touch $(GRAMMAR_C)
+ 
+ $(PGEN):       $(PGENOBJS)