Fail to build _curses module of Python 3.7.4 on AIX 7.1 using gcc

[LIUYONG]

BPO	37733
Nosy	@tiran, @aixtools, @kadler, @isidentical

^{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 2020-11-18.10:11:47.952>
created_at = <Date 2019-07-31.15:08:46.917>
labels = ['build', '3.7']
title = 'Fail to build _curses module of Python 3.7.4 on AIX 7.1 using gcc'
updated_at = <Date 2020-11-18.10:11:47.945>
user = 'https://bugs.python.org/LIUYONG'

bugs.python.org fields:

activity = <Date 2020-11-18.10:11:47.945>
actor = 'christian.heimes'
assignee = 'none'
closed = True
closed_date = <Date 2020-11-18.10:11:47.952>
closer = 'christian.heimes'
components = ['Build']
creation = <Date 2019-07-31.15:08:46.917>
creator = 'LIU YONG'
dependencies = []
files = []
hgrepos = []
issue_num = 37733
keywords = []
message_count = 5.0
messages = ['348811', '348898', '348917', '381285', '381322']
nosy_count = 6.0
nosy_names = ['christian.heimes', 'David.Edelsohn', 'Michael.Felt', 'kadler', 'BTaskaya', 'LIU YONG']
pr_nums = []
priority = 'normal'
resolution = 'out of date'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'compile error'
url = 'https://bugs.python.org/issue37733'
versions = ['Python 3.6', 'Python 3.7']

[LIUYONG]

Trying to build Python 3.7.4 on AIX 7.1 using gcc 6.3.0 but failed

Failed to build these modules:
_ctypes _curses _curses_panel

building '_curses' extension
gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -std=c99 -Wextra -Wno-unused-result -Wno-unused-parameter -Wno-missing-field-initializers -Werror=implicit-function-declaration -I./Include -I. -I/uxx/bxx/Python-3.7.4/Include -I/uxx/bxx/Python-3.7.4 -c /uxx/bxx/Python-3.7.4/Modules/_cursesmodule.c -o build/temp.aix-7.1-3.7/uxx/bxx/Python-3.7.4/Modules/_cursesmodule.o
Modules/ld_so_aix gcc -pthread -bI:Modules/python.exp build/temp.aix-7.1-3.7/uxx/bxx/Python-3.7.4/Modules/_cursesmodule.o -lncurses -o build/lib.aix-7.1-3.7/_curses.so
ld: 0711-317 ERROR: Undefined symbol: .box32
ld: 0711-317 ERROR: Undefined symbol: ._setqiflush
ld: 0711-317 ERROR: Undefined symbol: .setsyx
ld: 0711-317 ERROR: Undefined symbol: ._getsyx
ld: 0711-317 ERROR: Undefined symbol: .w32attroff
ld: 0711-317 ERROR: Undefined symbol: .w32attron
ld: 0711-317 ERROR: Undefined symbol: .w32attrset
ld: 0711-317 ERROR: Undefined symbol: .w32addch
ld: 0711-317 ERROR: Undefined symbol: _unctrl
ld: 0711-317 ERROR: Undefined symbol: .w32insch
ld: 0711-317 ERROR: Undefined symbol: .w32echochar
ld: 0711-317 ERROR: Undefined symbol: .p32echochar
ld: 0711-317 ERROR: Undefined symbol: .initscr32
ld: 0711-317 ERROR: Undefined symbol: wacs_map
ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more information.
collect2: error: ld returned 8 exit status
building '_curses_panel' extension
gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -std=c99 -Wextra -Wno-unused-result -Wno-unused-parameter -Wno-missing-field-initializers -Werror=implicit-function-declaration -I./Include -I. -I/uxx/bxx/Python-3.7.4/Include -I/uxx/bxx/Python-3.7.4 -c /uxx/bxx/Python-3.7.4/Modules/_curses_panel.c -o build/temp.aix-7.1-3.7/uxx/bxx/Python-3.7.4/Modules/_curses_panel.o
In file included from /opt/freeware/include/ncurses/panel.h:42:0,
                 from /uxx/bxx/Python-3.7.4/Modules/_curses_panel.c:17:
/opt/freeware/include/ncurses/curses.h:388:16: error: conflicting types for 'attr_t'
 typedef chtype attr_t;  /* ...must be at least as wide as chtype */
                ^~~~~~
In file included from ./Include/py_curses.h:36:0,
                 from /uxx/bxx/Python-3.7.4/Modules/_curses_panel.c:15:
/opt/freeware/lib/gcc/powerpc-ibm-aix7.1.0.0/6.3.0/include-fixed/curses.h:80:21: note: previous declaration of 'attr_t' was here
         typedef int attr_t;
                     ^~~~~~

[LIUYONG]

Additional information of environment
OS - AIX 7.1 (7100-05-03-1838)
gcc version 6.3.0 (GCC)
ncurses-6.1-2.ppc
ncurses-devel-6.1-2.ppc

I had tried to build Python3.7.3 and Python3.6.9, it hit same errors
It looks like some issue with ncurses version

[aixtools]

bpo-36210 needs a back-port to 3.7 and 3.6.

[kadler]

Both 3.6 and 3.7 are in security only mode so at this point, so if the issue is fixed in newer versions I think this issue could be closed.

[tiran]

Closing

As Kevin explained 3.7 only receives security fixes.