id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
18624	Vbox 6.0.6 build failure on Linux with gcc 9.1.0	berolinux		"Building vbox 6.0.6 on Linux with gcc 9.1.0 results in

{{{
kBuild: Compiling VBoxSVC - /home/bero/abf/virtualbox/BUILD/VirtualBox-6.0.6/src/VBox/Main/src-server/PerformanceImpl.cpp
/usr/include/c++/9.1.0/limits: In static member function ‘static constexpr double std::numeric_limits<double>::max()’:
/usr/include/c++/9.1.0/limits:1743:44: error: unable to find numeric literal operator ‘operator""""-0.0L’
 1743 |       max() _GLIBCXX_USE_NOEXCEPT { return __DBL_MAX__; }
      |                                            ^~~~~~~~~~~
/usr/include/c++/9.1.0/limits:1743:44: note: use ‘-fext-numeric-literals’ to enable more built-in suffixes
In file included from /usr/include/c++/9.1.0/bits/uniform_int_dist.h:35,
                 from /usr/include/c++/9.1.0/bits/stl_algo.h:66,
                 from /usr/include/c++/9.1.0/algorithm:62,
                 from /home/bero/abf/virtualbox/BUILD/VirtualBox-6.0.6/src/VBox/Main/src-server/PerformanceImpl.cpp:44:
/usr/include/c++/9.1.0/limits:1743:57: error: body of ‘constexpr’ function ‘static constexpr double std::numeric_limits<double>::max()’ not a return-statement
 1743 |       max() _GLIBCXX_USE_NOEXCEPT { return __DBL_MAX__; }
      |                                                         ^
/usr/include/c++/9.1.0/limits: In static member function ‘static constexpr double std::numeric_limits<double>::lowest()’:
/usr/include/c++/9.1.0/limits:1747:35: error: unable to find numeric literal operator ‘operator""""-0.0L’
 1747 |       lowest() noexcept { return -__DBL_MAX__; }
      |                                   ^~~~~~~~~~~
/usr/include/c++/9.1.0/limits:1747:35: note: use ‘-fext-numeric-literals’ to enable more built-in suffixes
/usr/include/c++/9.1.0/limits:1747:48: error: body of ‘constexpr’ function ‘static constexpr double std::numeric_limits<double>::lowest()’ not a return-statement
 1747 |       lowest() noexcept { return -__DBL_MAX__; }
      |                                                ^
kmk: *** [/home/bero/abf/virtualbox/BUILD/VirtualBox-6.0.6/kBuild/footer-pass2-compiling-targets.kmk:277: /home/bero/abf/virtualbox/BUILD/VirtualBox-6.0.6/out/linux.amd64/release/obj/VBoxSVC/src-server/PerformanceImpl.o] Error 1
}}}

While the error message looks like a problem in <limits> itself, the limits header works perfectly elsewhere (may be related to PCH usage in vbox?)"	defect	new	other	VirtualBox 6.0.6				other	Linux