qemu: Ensure pip and the python venv aren't used for meson

Qemu wants to use a supported python version and a specific meson version
to "help" users and uses pip and creates a venv to do this. This is a nightmare
for us. Our versions stay up to date and should be supported so we don't
really need/want this wrapping. Tweak things to disable it.

There was breakage from the wrapper shown by:

bitbake qemu-system-native
<add DISTRO_FEATURES:remove = "opengl" to local.conf>
bitbake qemu-system-native -c configure

which would crash. The issue is the change in configuration removes pieces
from the sysroot but pyc files remainm as do pieces of pip which causes
problems.

(From OE-Core rev: aceef7785e637a0223ecf288e2f367b6bee4a505)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 46 insertions, 0 deletions

diff --git a/meta/recipes-devtools/qemu/qemu.inc b/meta/recipes-devtools/qemu/qemu.inc
index 9e187a0995..70515d980e 100644
--- a/meta/recipes-devtools/qemu/qemu.inc
+++ b/meta/recipes-devtools/qemu/qemu.inc
@@ -34,6 +34,7 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \
            file://fixedmeson.patch \
            file://fixmips.patch \
            file://0001-vfio-Include-libgen.h-for-basename-API.patch \
+           file://no-pip.patch \
            file://qemu-guest-agent.init \
            file://qemu-guest-agent.udev \
            "
diff --git a/meta/recipes-devtools/qemu/qemu/no-pip.patch b/meta/recipes-devtools/qemu/qemu/no-pip.patch
new file mode 100644
index 0000000000..f52b4e4b83
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/no-pip.patch
@@ -0,0 +1,45 @@
+qemu: Ensure pip and the python venv aren't used for meson
+
+Qemu wants to use a supported python version and a specific meson version
+to "help" users and uses pip and creates a venv to do this. This is a nightmare
+for us. Our versions stay up to date and should be supported so we don't
+really need/want this wrapping. Tweak things to disable it.
+
+There was breakage from the wrapper shown by:
+
+bitbake qemu-system-native
+<add DISTRO_FEATURES:remove = "opengl" to local.conf>
+bitbake qemu-system-native -c configure
+
+which would crash. The issue is the change in configuration removes pieces
+from the sysroot but pyc files remainm as do pieces of pip which causes
+problems.
+
+Ideally we'd convince upstream to allow some way to disable the venv on
+the understanding that if/when it breaks, we keep the pieces. The patch
+as it stands is a workaround.
+
+Upstream-Status: Inappropriate [oe specific]
+Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
+
+diff --git a/configure b/configure
+index 133f4e3235..e4c144b4e2 100755
+--- a/configure
++++ b/configure
+@@ -1009,7 +1009,7 @@ python="$(command -v "$python")"
+ echo "python determined to be '$python'"
+ echo "python version: $($python --version)"
+ 
+-python="$($python -B "${source_path}/python/scripts/mkvenv.py" create pyvenv)"
++python=python3
+ if test "$?" -ne 0 ; then
+     error_exit "python venv creation failed"
+ fi
+@@ -1017,6 +1017,7 @@ fi
+ # Suppress writing compiled files
+ python="$python -B"
+ mkvenv="$python ${source_path}/python/scripts/mkvenv.py"
++mkvenv=true
+ 
+ mkvenv_flags=""
+ if test "$download" = "enabled" ; then