[Debian-med-packaging] Bug#906645: FTBFS due to "Dunno about this gcc"

[Lumin]

Source: insighttoolkit4
Version: 4.13.0-dfsg1
Severity: serious
Justification: FTBFS in sid/experimental.

[ 14%] Building CXX object Modules/ThirdParty/VNL/src/vxl/vcl/CMakeFiles/itkvcl.dir/vcl_deprecated.cxx.o
cd /dev/shm/rdepends/insighttoolkit4-4.13.0-dfsg1/BUILD/Modules/ThirdParty/VNL/src/vxl/vcl && /usr/bin/c++  -DVXL_LEGACY_ERROR_REPORTING -DVXL_WARN_DEPRECATED -DVXL_WARN_DEPRECATED_ONCE -Ditkvcl_EXPORTS -I/dev/shm/rdepends/insighttoolkit4-4.13.0-dfsg1/Modules/ThirdParty/VNL/src/vxl/v3p/netlib -I/dev/shm/rdepends/insighttoolkit4-4.13.0-dfsg1/Modules/ThirdParty/VNL/src/vxl/vcl -I/dev/shm/rdepends/insighttoolkit4-4.13.0-dfsg1/Modules/ThirdParty/VNL/src/vxl/core -I/dev/shm/rdepends/insighttoolkit4-4.13.0-dfsg1/BUILD/Modules/ThirdParty/VNL/src/vxl/v3p/netlib -I/dev/shm/rdepends/insighttoolkit4-4.13.0-dfsg1/BUILD/Modules/ThirdParty/VNL/src/vxl/vcl -I/dev/shm/rdepends/insighttoolkit4-4.13.0-dfsg1/BUILD/Modules/ThirdParty/VNL/src/vxl/core  -g -O2 -fdebug-prefix-map=/dev/shm/rdepends/insighttoolkit4-4.13.0-dfsg1=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -I/usr/include/nifti  -Wall -Wcast-align -Wdisabled-optimization -Wextra -Wformat=2 -Winvalid-pch -Wno-format-nonliteral -Wpointer-arith -Wshadow -Wunused -Wwrite-strings -funit-at-a-time -Wno-strict-overflow -Wno-deprecated -Wno-invalid-offsetof -Woverloaded-virtual -Wstrict-null-sentinel  -w  -fPIC   -o CMakeFiles/itkvcl.dir/vcl_deprecated.cxx.o -c /dev/shm/rdepends/insighttoolkit4-4.13.0-dfsg1/Modules/ThirdParty/VNL/src/vxl/vcl/vcl_deprecated.cxx
In file included from /dev/shm/rdepends/insighttoolkit4-4.13.0-dfsg1/Modules/ThirdParty/VNL/src/vxl/vcl/vcl_iostream.h:5,
                 from /dev/shm/rdepends/insighttoolkit4-4.13.0-dfsg1/Modules/ThirdParty/VNL/src/vxl/vcl/vcl_deprecated.cxx:4:
/dev/shm/rdepends/insighttoolkit4-4.13.0-dfsg1/Modules/ThirdParty/VNL/src/vxl/vcl/vcl_compiler.h:90:4: error: #error "Dunno about this gcc"
 #  error "Dunno about this gcc"
    ^~~~~
make[2]: *** [Modules/ThirdParty/VNL/src/vxl/vcl/CMakeFiles/itkvcl.dir/build.make:66: Modules/ThirdParty/VNL/src/vxl/vcl/CMakeFiles/itkvcl.dir/vcl_deprecated.cxx.o] Error 1
make[2]: Leaving directory '/dev/shm/rdepends/insighttoolkit4-4.13.0-dfsg1/BUILD'
make[1]: *** [CMakeFiles/Makefile2:1636: Modules/ThirdParty/VNL/src/vxl/vcl/CMakeFiles/itkvcl.dir/all] Error 2
make[1]: Leaving directory '/dev/shm/rdepends/insighttoolkit4-4.13.0-dfsg1/BUILD'
make: *** [Makefile:166: all] Error 2