Bug#946294: clutter-1.0: Please make autopkgtests cross-test-friendly

[Steve Langasek]

Package: clutter-1.0
Version: 1.26.2+dfsg-12
Severity: minor
Tags: patch
User: ubuntu-devel at lists.ubuntu.com
Usertags: origin-ubuntu focal ubuntu-patch

Dear maintainers,

In Ubuntu, we are in the process of moving the i386 architecture to a
compatibility-only layer on amd64, and therefore we are also moving our
autopkgtest infrastructure to test i386 binaries in a cross-environment.

This requires changes to some tests so that they are cross-aware and can do
the right thing.

The clutter-1.0 tests currently fail in this environment, because they are
build tests that do not invoke the toolchain in a cross-aware manner.  I've
verified that the attached patch lets the tests successfully build (and run)
i386 tests on an amd64 host.

Note that upstream autopkgtest doesn't currently set DEB_HOST_ARCH so this
is a complete no-op in Debian for the moment.  Support for cross-testing in
autopkgtest is currently awaiting review at
https://salsa.debian.org/ci-team/autopkgtest/merge_requests/69 and once
landed, will still have no effect unless autopkgtest is invoked with a '-a'
option.  So this change should be safe to land in your package despite this
not being upstream in autopkgtest.

Thanks for considering,
-- 
Steve Langasek                   Give me a lever long enough and a Free OS
Debian Developer                   to set it on, and I can move the world.
Ubuntu Developer                                   https://www.debian.org/
slangasek at ubuntu.com                                     vorlon at debian.org
-------------- next part --------------
diff -Nru clutter-1.0-1.26.2+dfsg/debian/tests/build clutter-1.0-1.26.2+dfsg/debian/tests/build
--- clutter-1.0-1.26.2+dfsg/debian/tests/build	2019-08-27 02:44:04.000000000 -0700
+++ clutter-1.0-1.26.2+dfsg/debian/tests/build	2019-12-06 10:28:51.000000000 -0800
@@ -11,6 +11,12 @@
 export XDG_RUNTIME_DIR="$WORKDIR"
 trap "rm -rf $WORKDIR" 0 INT QUIT ABRT PIPE TERM
 cd $WORKDIR
+
+if [ -n "$DEB_HOST_MULTIARCH" ]; then
+    export PKG_CONFIG_PATH="/usr/lib/$DEB_HOST_MULTIARCH/pkgconfig"
+    CROSS_COMPILE="$DEB_HOST_GNU_TYPE-"
+fi
+
 cat <<EOF > cally.c
 #include <cally/cally.h>
 
@@ -53,7 +59,7 @@
             ;;
     esac
 
-    gcc -o "${lib}-test" "${code}" $(pkg-config --cflags --libs ${packages})
+    ${CROSS_COMPILE}gcc -o "${lib}-test" "${code}" $(pkg-config --cflags --libs ${packages})
     echo "build ($lib): OK"
     [ -x "${lib}-test" ]
     dbus-run-session -- xvfb-run -a "./${lib}-test"