Bug#831189: librecad: FTBFS with GCC 6: cstdlib:75:25: fatal error: stdlib.h: No such file or directory

[Lucas Nussbaum]

Source: librecad
Version: 2.0.9-2
Severity: serious
Tags: stretch sid
User: debian-qa at lists.debian.org
Usertags: qa-ftbfs-20160713 qa-ftbfs
Justification: FTBFS with GCC 6 on amd64

Hi,

During a rebuild of all packages in sid using the gcc-defaults package
available in experimental to make GCC default to version 6, your package failed
to build on amd64. For more information about GCC 6 and Stretch, see:
- https://wiki.debian.org/GCC6
- https://lists.debian.org/debian-devel-announce/2016/06/msg00007.html

Relevant part (hopefully):
> g++ -c -m64 -pipe -g -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -std=gnu++0x -Wall -W -D_REENTRANT -fPIC -DQC_APPKEY="/LibreCAD" -DQC_APPNAME="LibreCAD" -DQC_COMPANYNAME="LibreCAD" -DQC_COMPANYKEY="LibreCAD" -DQC_VERSION="master" -DQC_DELAYED_SPLASH_SCREEN=1 -DHAS_BOOST=1 -DDWGSUPPORT -DQC_SCMREVISION="2.0.9" -DQC_APPDIR="librecad" -DQINITIMAGES_LIBRECAD=qInitImages_librecad -DQT_NO_DEBUG -DQT_SVG_LIB -DQT_PRINTSUPPORT_LIB -DQT_HELP_LIB -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I. -isystem /usr/include -I../../libraries/libdxfrw/src -I../../libraries/jwwlib/src -Icmd -Ilib/actions -Ilib/creation -Ilib/debug -Ilib/engine -Ilib/fileio -Ilib/filters -Ilib/generators -Ilib/gui -Ilib/information -Ilib/math -Ilib/modification -Ilib/scripting -Iactions -Imain -Itest -Iplugins -Iui -Iui/forms -I../res -isystem /usr/include/x86_64-linux-gnu/qt5 -isystem /usr/include/x86_64-linux-gnu/qt5/QtSvg -isystem /usr/include/x86_64-linux-gnu/qt5/QtPrintSupport -isystem /usr/include/x86_64-linux-gnu/qt5/QtHelp -isystem /usr/include/x86_64-linux-gnu/qt5/QtWidgets -isystem /usr/include/x86_64-linux-gnu/qt5/QtGui -isystem /usr/include/x86_64-linux-gnu/qt5/QtCore -I../../generated/librecad/moc -I../../generated/librecad/ui -I/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++-64 -o ../../generated/librecad/obj/rs_actioninterface.o lib/actions/rs_actioninterface.cpp
> In file included from /usr/include/c++/6/bits/stl_algo.h:59:0,
>                  from /usr/include/c++/6/algorithm:62,
>                  from /usr/include/x86_64-linux-gnu/qt5/QtCore/qglobal.h:88,
>                  from /usr/include/x86_64-linux-gnu/qt5/QtGui/qwindowdefs.h:37,
>                  from /usr/include/x86_64-linux-gnu/qt5/QtGui/qevent.h:37,
>                  from /usr/include/x86_64-linux-gnu/qt5/QtGui/QKeyEvent:1,
>                  from lib/actions/rs_actioninterface.cpp:27:
> /usr/include/c++/6/cstdlib:75:25: fatal error: stdlib.h: No such file or directory
>  #include_next <stdlib.h>
>                          ^
> compilation terminated.
> make[3]: *** [../../generated/librecad/obj/rs_actioninterface.o] Error 1

The full build log is available from:
   http://people.debian.org/~lucas/logs/2016/07/13/librecad_2.0.9-2_unstable_gcc6.log

A list of current common problems and possible solutions is available at
http://wiki.debian.org/qa.debian.org/FTBFS . You're welcome to contribute!

About the archive rebuild: The rebuild was done on EC2 VM instances from
Amazon Web Services, using a clean, minimal and up-to-date chroot. Every
failed build was retried once to eliminate random failures.