build-sys: deprecate mips host

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20250924120426.2158655-26-marcandre.lureau@redhat.com>

docs/about/build-platforms.rst

@@ -44,8 +44,6 @@ Those hosts are officially supported, with various accelerators:
      - Accelerators
    * - Arm
      - hvf (64 bit only), kvm (64 bit only), tcg, xen
-   * - MIPS (64 bit little endian only)
-     - kvm, tcg
    * - PPC
      - kvm, tcg
    * - RISC-V

docs/about/deprecated.rst

@@ -172,8 +172,8 @@ This argument has always been ignored.
 Host Architectures
 ------------------
 
-Big endian MIPS since 7.2; 32-bit little endian MIPS since 9.2
-''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
+Big endian MIPS since 7.2; 32-bit little endian MIPS since 9.2, MIPS since 11.0
+'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
 
 As Debian 10 ("Buster") moved into LTS the big endian 32 bit version of
 MIPS moved out of support making it hard to maintain our
@@ -181,10 +181,7 @@ cross-compilation CI tests of the architecture. As we no longer have
 CI coverage support may bitrot away before the deprecation process
 completes.
 
-Likewise, the little endian variant of 32 bit MIPS is not supported by
-Debian 13 ("Trixie") and newer.
-
-64 bit little endian MIPS is still a supported host architecture.
+Likewise, MIPS is not supported by Debian 13 ("Trixie") and newer.
 
 System emulation on 32-bit x86 hosts (since 8.0)
 ''''''''''''''''''''''''''''''''''''''''''''''''

meson.build

@@ -5040,6 +5040,14 @@ elif host_long_bits < 64
   message()
   message('Support for 32-bit CPU host architecture ' + cpu + ' is going')
   message('to be dropped in a future QEMU release.')
+elif host_arch == 'mips'
+  message()
+  warning('DEPRECATED HOST CPU')
+  message()
+  message('Support for CPU host architecture ' + cpu + ' is going to be')
+  message('dropped as soon as the QEMU project stops supporting Debian 12')
+  message('("Bookworm"). Going forward, the QEMU project will not guarantee')
+  message('that QEMU will compile or work on this host CPU.')
 endif
 
 if not supported_oses.contains(host_os)