tests/tcg: gate pauth-% tests on having compiler support

Otherwise we end up failing to build our tests on CI which may have
older compilers that the user expects. We can get rid of this once we
can fallback to multiarch containers.
Signed-off-by: NAlex Bennée <alex.bennee@linaro.org>
Message-Id: <20200203090932.19147-14-alex.bennee@linaro.org>

tests/tcg/aarch64/Makefile.softmmu-target

@@ -61,7 +61,13 @@ run-memory-replay: memory-replay run-memory-record
 	   	  $(QEMU_OPTS) memory, \
 	  "$< on $(TARGET_NAME)")
 
-run-pauth-3: pauth-3
-pauth-3: CFLAGS += -march=armv8.3-a
+EXTRA_TESTS+=memory-record memory-replay
 
-EXTRA_TESTS+=memory-record memory-replay pauth-3
+ifneq ($(DOCKER_IMAGE)$(CROSS_CC_HAS_ARMV8_3),)
+pauth-3: CFLAGS += -march=armv8.3-a
+else
+pauth-3:
+	$(call skip-test, "BUILD of $@", "missing compiler support")
+run-pauth-3:
+	$(call skip-test, "RUN of pauth-3", "not built")
+endif

tests/tcg/aarch64/Makefile.target

@@ -18,9 +18,11 @@ run-fcvt: fcvt
 	$(call diff-out,$<,$(AARCH64_SRC)/fcvt.ref)
 
 # Pauth Tests
+ifneq ($(DOCKER_IMAGE)$(CROSS_CC_HAS_ARMV8_3),)
 AARCH64_TESTS += pauth-1 pauth-2 pauth-4
 run-pauth-%: QEMU_OPTS += -cpu max
 pauth-%: CFLAGS += -march=armv8.3-a
+endif
 
 # Semihosting smoke test for linux-user
 AARCH64_TESTS += semihosting

tests/tcg/configure.sh

@@ -227,6 +227,10 @@ for target in $target_list; do
                -march=armv8.1-a+sve -o $TMPE $TMPC; then
                 echo "CROSS_CC_HAS_SVE=y" >> $config_target_mak
             fi
+            if do_compiler "$target_compiler" $target_compiler_cflags \
+               -march=-march=armv8.3-a -o $TMPE $TMPC; then
+                echo "CROSS_CC_HAS_ARMV8_3=y" >> $config_target_mak
+            fi
         ;;
     esac