Bug#914752: opencv: FTBFS against python3.7.1: error: invalid conversion from 'const char*' to 'char*' [-fpermissive]

[Gilles Filippini]

Source: opencv
Version: 3.2.0+dfsg-4.1+b1
Severity: serious
Tags: ftbfs
Justification: FTBFS

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Hi,

OpenCV FTBFS aginst python3.7.1 which is transitioning as default for python3:

/build/opencv-mrTo2C/opencv-3.2.0+dfsg/modules/python/src2/cv2.cpp:730:34: error: invalid conversion from 'const char*' to 'char*' [-fpermissive]
     char* str = PyString_AsString(obj);

Full builg log:
https://buildd.debian.org/status/fetch.php?pkg=opencv&arch=arm64&ver=3.2.0%2Bdfsg-4.1%2Bb2&stamp=1542824858&raw=0

Thanks,

_g.

- -- System Information:
Debian Release: buster/sid
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.14.0-3-amd64 (SMP w/4 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8), LANGUAGE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

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