tests/tcg: list test targets in Makefile.prereqs

Omit the rules altogether for targets that do not have a compiler.
Makefile.qemu now is only invoked if the tests are actually built/run.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20220401141326.1244422-14-pbonzini@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220419091020.3008144-17-alex.bennee@linaro.org>

tests/Makefile.include

@@ -36,19 +36,16 @@ export SRC_PATH
 
 SPEED = quick
 
-# Build up our target list from the filtered list of ninja targets
-TARGETS=$(patsubst libqemu-%.fa, %, $(filter libqemu-%.fa, $(ninja-targets)))
-
 -include tests/tcg/Makefile.prereqs
 config-host.mak: $(SRC_PATH)/tests/tcg/configure.sh
 tests/tcg/Makefile.prereqs: config-host.mak
 
 # Per guest TCG tests
-BUILD_TCG_TARGET_RULES=$(patsubst %,build-tcg-tests-%, $(TARGETS))
-CLEAN_TCG_TARGET_RULES=$(patsubst %,clean-tcg-tests-%, $(TARGETS))
-RUN_TCG_TARGET_RULES=$(patsubst %,run-tcg-tests-%, $(TARGETS))
+BUILD_TCG_TARGET_RULES=$(patsubst %,build-tcg-tests-%, $(TCG_TESTS_TARGETS))
+CLEAN_TCG_TARGET_RULES=$(patsubst %,clean-tcg-tests-%, $(TCG_TESTS_TARGETS))
+RUN_TCG_TARGET_RULES=$(patsubst %,run-tcg-tests-%, $(TCG_TESTS_TARGETS))
 
-$(foreach TARGET,$(TARGETS), \
+$(foreach TARGET,$(TCG_TESTS_TARGETS), \
         $(eval $(BUILD_DIR)/tests/tcg/config-$(TARGET).mak: config-host.mak))
 
 $(BUILD_TCG_TARGET_RULES): build-tcg-tests-%: $(if $(CONFIG_PLUGIN),test-plugins)
@@ -84,6 +81,9 @@ clean-tcg: $(CLEAN_TCG_TARGET_RULES)
 
 .PHONY: check-venv check-avocado check-acceptance check-acceptance-deprecated-warning
 
+# Build up our target list from the filtered list of ninja targets
+TARGETS=$(patsubst libqemu-%.fa, %, $(filter libqemu-%.fa, $(ninja-targets)))
+
 TESTS_VENV_DIR=$(BUILD_DIR)/tests/venv
 TESTS_VENV_REQ=$(SRC_PATH)/tests/requirements.txt
 TESTS_RESULTS_DIR=$(BUILD_DIR)/tests/results

tests/tcg/Makefile.qemu

@@ -95,7 +95,6 @@ all:
 
 .PHONY: guest-tests
 
-ifneq ($(GUEST_BUILD),)
 guest-tests: $(GUEST_BUILD)
 
 run-guest-tests: guest-tests
@@ -105,16 +104,6 @@ run-guest-tests: guest-tests
 	 		SRC_PATH="$(SRC_PATH)" SPEED=$(SPEED) run), \
 	"RUN", "tests for $(TARGET_NAME)")
 
-else
-guest-tests:
-	$(call quiet-command, true, "BUILD", \
-		"$(TARGET) guest-tests SKIPPED")
-
-run-guest-tests:
-	$(call quiet-command, true, "RUN", \
-		"tests for $(TARGET) SKIPPED")
-endif
-
 # It doesn't matter if these don't exits
 .PHONY: clean-guest-tests
 clean-guest-tests:

tests/tcg/configure.sh

@@ -81,7 +81,9 @@ fi
 : ${cross_ld_tricore="tricore-ld"}
 
 makefile=tests/tcg/Makefile.prereqs
-: > $makefile
+echo "# Automatically generated by configure - do not modify" > $makefile
+
+tcg_tests_targets=
 for target in $target_list; do
   arch=${target%%-*}
 
@@ -228,18 +230,15 @@ for target in $target_list; do
   echo "target=$target" >> $config_target_mak
   case $target in
     *-softmmu)
+      test -f $source_path/tests/tcg/$arch/Makefile.softmmu-target || continue
       qemu="qemu-system-$arch"
       ;;
     *-linux-user|*-bsd-user)
       qemu="qemu-$arch"
       ;;
   esac
 
-  echo "run-tcg-tests-$target: $qemu\$(EXESUF)" >> $makefile
-
   eval "target_compiler_cflags=\${cross_cc_cflags_$arch}"
-  echo "QEMU=$PWD/$qemu" >> $config_target_mak
-  echo "CROSS_CC_GUEST_CFLAGS=$target_compiler_cflags" >> $config_target_mak
 
   got_cross_cc=no
 
@@ -362,8 +361,16 @@ for target in $target_list; do
                       echo "CROSS_CC_HAS_I386_NOPIE=y" >> $config_target_mak
                       ;;
               esac
+              got_cross_cc=yes
               break
           fi
       done
   fi
+  if test $got_cross_cc = yes; then
+      echo "QEMU=$PWD/$qemu" >> $config_target_mak
+      echo "CROSS_CC_GUEST_CFLAGS=$target_compiler_cflags" >> $config_target_mak
+      echo "run-tcg-tests-$target: $qemu\$(EXESUF)" >> $makefile
+      tcg_tests_targets="$tcg_tests_targets $target"
+  fi
 done
+echo "TCG_TESTS_TARGETS=$tcg_tests_targets" >> $makefile