Include/graminit.h and Python/graminit.c always rebuilt (breaks cross builds)

[WanderingLogic]

BPO	22809
Nosy	@birkenfeld
Superseder	bpo-22625: When cross-compiling, don’t try to execute binaries

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2014-11-06.21:37:12.697>
created_at = <Date 2014-11-06.21:12:58.103>
labels = ['build']
title = 'Include/graminit.h and Python/graminit.c always rebuilt (breaks cross builds)'
updated_at = <Date 2014-11-06.21:37:12.695>
user = 'https://bugs.python.org/WanderingLogic'

bugs.python.org fields:

activity = <Date 2014-11-06.21:37:12.695>
actor = 'georg.brandl'
assignee = 'none'
closed = True
closed_date = <Date 2014-11-06.21:37:12.697>
closer = 'georg.brandl'
components = ['Build', 'Cross-Build']
creation = <Date 2014-11-06.21:12:58.103>
creator = 'WanderingLogic'
dependencies = []
files = []
hgrepos = []
issue_num = 22809
keywords = []
message_count = 2.0
messages = ['230765', '230767']
nosy_count = 2.0
nosy_names = ['georg.brandl', 'WanderingLogic']
pr_nums = []
priority = 'normal'
resolution = 'duplicate'
stage = None
status = 'closed'
superseder = '22625'
type = None
url = 'https://bugs.python.org/issue22809'
versions = ['Python 3.5']

[WanderingLogic]

changeset 92496:c2a53aa27cad (bpo-22359) broke cross builds. (Now "make touch; make" always tries to rebuild Include/graminit.h and Python/graminit.c by running "pgen". But "pgen" is a host executable and won't run on the build machine during a cross-build.)

I think the problem is here, around Makefile.pre.in line 750. The dependency was on PGENSRCS and is now on PGEN. Will changing it back to PGENSRCS break something else?

@@ -745,15 +746,13 @@
 
 $(IO_OBJS): $(IO_H)
 
-$(GRAMMAR_H): $(GRAMMAR_INPUT) $(PGENSRCS)
+$(GRAMMAR_H): $(GRAMMAR_INPUT) $(PGEN)

[birkenfeld]

Duplicate of bpo-22625.