[kvm-unit-tests PATCH 29/32] configure: Fail on unknown arch

[Nicholas Piggin <npiggin@gmail.com>]

configure will accept an unknown arch, and if it is the name of a
directory in the source tree the command will silently succeed. Make
it only accept supported arch names.

Also print the full path of a missing test directory to disambiguate
the error in out of tree builds.

Cc: Alexandru Elisei <alexandru.elisei@arm.com>
Cc: Andrew Jones <andrew.jones@linux.dev>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Eric Auger <eric.auger@redhat.com>
Cc: Janosch Frank <frankja@linux.ibm.com>
Cc: Laurent Vivier <lvivier@redhat.com>
Cc: Nico Böhr <nrb@linux.ibm.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Thomas Huth <thuth@redhat.com>
Cc: kvm@vger.kernel.org
Cc: linux-s390@vger.kernel.org
Cc: kvmarm@lists.linux.dev
Cc: kvm-riscv@lists.infradead.org
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 configure | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/configure b/configure
index 6907ccbbb..ae522c556 100755
--- a/configure
+++ b/configure
@@ -45,7 +45,8 @@ usage() {
 	Usage: $0 [options]
 
 	Options include:
-	    --arch=ARCH            architecture to compile for ($arch)
+	    --arch=ARCH            architecture to compile for ($arch). ARCH can be one of:
+	                           arm, arm64, i386, ppc64, riscv32, riscv64, s390x, x86_64
 	    --processor=PROCESSOR  processor to compile for ($arch)
 	    --target=TARGET        target platform that the tests will be running on (qemu or
 	                           kvmtool, default is qemu) (arm/arm64 only)
@@ -321,11 +322,15 @@ elif [ "$arch" = "ppc64" ]; then
 elif [ "$arch" = "riscv32" ] || [ "$arch" = "riscv64" ]; then
     testdir=riscv
     arch_libdir=riscv
+elif [ "$arch" = "s390x" ]; then
+    testdir=s390x
 else
-    testdir=$arch
+    echo "arch $arch is not supported!"
+    arch=
+    usage
 fi
 if [ ! -d "$srcdir/$testdir" ]; then
-    echo "$testdir does not exist!"
+    echo "$srcdir/$testdir does not exist!"
     exit 1
 fi
 
-- 
2.42.0