Bug#886422: /usr/include/glibmm-2.4/glibmm/variant.h: Incompatible with clang++-6.0

[Philipp Marek]

Package: libglibmm-2.4-dev
Version: 2.54.1-2
Severity: normal
File: /usr/include/glibmm-2.4/glibmm/variant.h


Trying to compile some sources (pulseview from the sigrok project) with 
clang++-6.0 I get this error:

    /usr/include/glibmm-2.4/glibmm/variant.h:2132:3: error: use of this statement in a constexpr function is a C++14 extension [-Werror,-Wc++14-extensions]
      (void)arg;
      ^

If the message is correct, this header file should be fixed; if it ain't, 
I guess that clang++-6.0 is at fault.


Thanks!


-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'testing-debug'), (500, 'unstable'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.14.0-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=de_AT.UTF-8, LC_CTYPE=de_AT.UTF-8 (charmap=UTF-8), LANGUAGE=de_AT:de (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages libglibmm-2.4-dev:amd64 depends on:
ii  libglib2.0-dev     2.54.2-5
ii  libglibmm-2.4-1v5  2.54.1-2
ii  libsigc++-2.0-dev  2.10.0-1
ii  pkg-config         0.29-4+b1

libglibmm-2.4-dev:amd64 recommends no packages.

Versions of packages libglibmm-2.4-dev:amd64 suggests:
pn  libglibmm-2.4-doc  <none>
pn  libgtkmm-3.0-dev   <none>

-- no debconf information

--