tests: simplify Makefile invocation for tests/tcg

Remove the DOCKER_SCRIPT and TARGET variable from the Makefile invocation
for tests/tcg.  For DOCKER_SCRIPT, resolve the path to docker.py in configure;
for TARGET, move it to config-$(TARGET).mak and use a symbolic link to break
the cycle.

The symbolic link is still needed because tests/tcg includes dummy config files
for targets that are not buildable.  Once that is cleaned up, the symbolic link
will go away too.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20220929114231.583801-20-alex.bennee@linaro.org>

configure

@@ -1784,6 +1784,9 @@ if test $use_containers = "yes"; then
         podman) container=podman ;;
         no) container=no ;;
     esac
+    if test "$container" != "no"; then
+        docker_py="$python $source_path/tests/docker/docker.py --engine $container"
+    fi
 fi
 
 # cross compilers defaults, can be overridden with --cross-cc-ARCH
@@ -2153,16 +2156,16 @@ write_target_makefile() {
 write_container_target_makefile() {
   echo "EXTRA_CFLAGS=$target_cflags"
   if test -n "$container_cross_cc"; then
-    echo "CC=\$(DOCKER_SCRIPT) cc --cc $container_cross_cc -i qemu/$container_image -s $source_path --"
-    echo "CCAS=\$(DOCKER_SCRIPT) cc --cc $container_cross_cc -i qemu/$container_image -s $source_path --"
+    echo "CC=$docker_py cc --cc $container_cross_cc -i qemu/$container_image -s $source_path --"
+    echo "CCAS=$docker_py cc --cc $container_cross_cc -i qemu/$container_image -s $source_path --"
   fi
-  echo "AR=\$(DOCKER_SCRIPT) cc --cc $container_cross_ar -i qemu/$container_image -s $source_path --"
-  echo "AS=\$(DOCKER_SCRIPT) cc --cc $container_cross_as -i qemu/$container_image -s $source_path --"
-  echo "LD=\$(DOCKER_SCRIPT) cc --cc $container_cross_ld -i qemu/$container_image -s $source_path --"
-  echo "NM=\$(DOCKER_SCRIPT) cc --cc $container_cross_nm -i qemu/$container_image -s $source_path --"
-  echo "OBJCOPY=\$(DOCKER_SCRIPT) cc --cc $container_cross_objcopy -i qemu/$container_image -s $source_path --"
-  echo "RANLIB=\$(DOCKER_SCRIPT) cc --cc $container_cross_ranlib -i qemu/$container_image -s $source_path --"
-  echo "STRIP=\$(DOCKER_SCRIPT) cc --cc $container_cross_strip -i qemu/$container_image -s $source_path --"
+  echo "AR=$docker_py cc --cc $container_cross_ar -i qemu/$container_image -s $source_path --"
+  echo "AS=$docker_py cc --cc $container_cross_as -i qemu/$container_image -s $source_path --"
+  echo "LD=$docker_py cc --cc $container_cross_ld -i qemu/$container_image -s $source_path --"
+  echo "NM=$docker_py cc --cc $container_cross_nm -i qemu/$container_image -s $source_path --"
+  echo "OBJCOPY=$docker_py cc --cc $container_cross_objcopy -i qemu/$container_image -s $source_path --"
+  echo "RANLIB=$docker_py cc --cc $container_cross_ranlib -i qemu/$container_image -s $source_path --"
+  echo "STRIP=$docker_py cc --cc $container_cross_strip -i qemu/$container_image -s $source_path --"
 }
 
 
@@ -2558,6 +2561,8 @@ for target in $target_list; do
   fi
   if test $got_cross_cc = yes; then
       mkdir -p tests/tcg/$target
+      ln -sf ../config-$target.mak tests/tcg/$target/config-target.mak
+      echo "TARGET=$target" >> "$config_target_mak"
       echo "QEMU=$PWD/$qemu" >> "$config_target_mak"
       echo "run-tcg-tests-$target: $qemu\$(EXESUF)" >> $makefile
       tcg_tests_targets="$tcg_tests_targets $target"

tests/Makefile.include

@@ -50,23 +50,20 @@ $(foreach TARGET,$(TCG_TESTS_TARGETS), \
 .PHONY: $(TCG_TESTS_TARGETS:%=build-tcg-tests-%)
 $(TCG_TESTS_TARGETS:%=build-tcg-tests-%): build-tcg-tests-%: $(BUILD_DIR)/tests/tcg/config-%.mak
 	$(call quiet-command, \
-            $(MAKE) -C tests/tcg/$* -f ../Makefile.target $(SUBDIR_MAKEFLAGS) \
-                        DOCKER_SCRIPT="$(DOCKER_SCRIPT)" \
-                        TARGET="$*" SRC_PATH="$(SRC_PATH)", \
+            $(MAKE) -C tests/tcg/$* -f ../Makefile.target $(SUBDIR_MAKEFLAGS), \
         "BUILD","$* guest-tests")
 
 .PHONY: $(TCG_TESTS_TARGETS:%=run-tcg-tests-%)
 $(TCG_TESTS_TARGETS:%=run-tcg-tests-%): run-tcg-tests-%: build-tcg-tests-%
 	$(call quiet-command, \
            $(MAKE) -C tests/tcg/$* -f ../Makefile.target $(SUBDIR_MAKEFLAGS) \
-                        TARGET="$*" SRC_PATH="$(SRC_PATH)" SPEED=$(SPEED) run, \
+                        SPEED=$(SPEED) run, \
         "RUN", "$* guest-tests")
 
 .PHONY: $(TCG_TESTS_TARGETS:%=clean-tcg-tests-%)
 $(TCG_TESTS_TARGETS:%=clean-tcg-tests-%): clean-tcg-tests-%:
 	$(call quiet-command, \
-           $(MAKE) -C tests/tcg/$* -f ../Makefile.target $(SUBDIR_MAKEFLAGS) \
-                        TARGET="$*" SRC_PATH="$(SRC_PATH)" clean, \
+           $(MAKE) -C tests/tcg/$* -f ../Makefile.target $(SUBDIR_MAKEFLAGS) clean, \
         "CLEAN", "$* guest-tests")
 
 .PHONY: build-tcg

tests/tcg/Makefile.target

@@ -31,7 +31,7 @@
 
 all:
 -include ../config-host.mak
--include ../config-$(TARGET).mak
+-include config-target.mak
 
 # Get semihosting definitions for user-mode emulation
 ifeq ($(filter %-softmmu, $(TARGET)),)