Re: ERROR: glib-2.48 gthread-2.0 is required to compile QEMU

[Peter Maydell]

On Sun, 18 Oct 2020 at 15:38, Lee <380121850@163.com> wrote:
> Ubuntu 14.04.6 LTS, X86_64
> I  make source code of version qemu 5.1\5.0\4.2,and foud the error:glib-2.48 
> gthread-2.0 is required to compile QEMU
> try apt-get install libglib2.0-dev,and it is sucess :
> Reading state information... Done
> libglib2.0-dev is already the newest version.

I believe that Ubuntu 14.04 shipped with libglib2.0-dev
version 2.40.2 -- this is too old, as the QEMU error
message says.

The simplest thing to do would be for you to upgrade your Ubuntu
install -- 14.04 is now very old (it reached "end of standard
support", ie no more security fixes unless you're paying
Canonical for extended security maintenance, in April 2019).

QEMU's distro support policy is documented here:
https://www.qemu.org/docs/master/system/build-platforms.html
For distros like Ubuntu with a 'long-lifetime' type release
(like LTS), we support the most recent major version, and
the previous major version up until 2 years after the next
major version was released. So we support 20.04 LTS (the
most recent) and also will support 18.04 LTS until at least
April 2022 (since 20.04 was released in April 2020), but
anything older than that is not officially supported and
may or may not work.

> i found that version qemu 4.1 is OK,the same environment

QEMU 4.1 did not require the newer version of glib. (As we
develop QEMU we want to be able to use the extra features
in newer versions of our dependent libraries and to be able
to remove backwards-compatibility code that is needed only
when using older versions of those libraries, so sometimes
when all the distros and versions we support ship with a
new enough version of a library we will increase the
minimum required version that QEMU needs to build.)

thanks
-- PMM