tests/tcg: Add docker_as and docker_ld cmds

At least for the TriCore target no easily available c compiler exists.
Thus we need to rely on "as" and "ld". This allows us to run them
through the docker image. We don't test the generation capabilities of
docker images as they are assumed to work.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
[AJB: fix quoting, only handle docker & clear, test -n, tweak commit msg]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

Message-Id: <20210512102051.12134-12-alex.bennee@linaro.org>

tests/tcg/Makefile.qemu

@@ -22,6 +22,8 @@ quiet-@ = $(if $(V),,@)
 quiet-command = $(quiet-@)$(call quiet-command-run,$1,$2,$3)
 
 CROSS_CC_GUEST:=
+CROSS_AS_GUEST:=
+CROSS_LD_GUEST:=
 DOCKER_IMAGE:=
 
 -include tests/tcg/config-$(TARGET).mak
@@ -42,6 +44,8 @@ cross-build-guest-tests:
 	$(call quiet-command, \
 	   (mkdir -p tests/tcg/$(TARGET) && cd tests/tcg/$(TARGET) && \
 	    $(MAKE) -f $(TCG_MAKE) TARGET="$(TARGET)" CC="$(CROSS_CC_GUEST)" \
+			$(if $(CROSS_AS_GUEST),AS="$(CROSS_AS_GUEST)") \
+			$(if $(CROSS_LD_GUEST),LD="$(CROSS_LD_GUEST)") \
 			SRC_PATH="$(SRC_PATH)" BUILD_STATIC=$(CROSS_CC_GUEST_STATIC) \
 			EXTRA_CFLAGS="$(CROSS_CC_GUEST_CFLAGS)"), \
 	"BUILD","$(TARGET) guest-tests with $(CROSS_CC_GUEST)")
@@ -59,11 +63,24 @@ DOCKER_COMPILE_CMD="$(DOCKER_SCRIPT) cc \
 		-i qemu/$(DOCKER_IMAGE) \
 		-s $(SRC_PATH) -- "
 
+DOCKER_AS_CMD=$(if $(DOCKER_CROSS_AS_GUEST),"$(DOCKER_SCRIPT) cc \
+		--cc $(DOCKER_CROSS_AS_GUEST) \
+		-i qemu/$(DOCKER_IMAGE) \
+		-s $(SRC_PATH) -- ")
+
+DOCKER_LD_CMD=$(if $(DOCKER_CROSS_LD_GUEST),"$(DOCKER_SCRIPT) cc \
+		--cc $(DOCKER_CROSS_LD_GUEST) \
+		-i qemu/$(DOCKER_IMAGE) \
+		-s $(SRC_PATH) -- ")
+
+
 .PHONY: docker-build-guest-tests
 docker-build-guest-tests: docker-image-$(DOCKER_IMAGE)
 	$(call quiet-command, \
 	  (mkdir -p tests/tcg/$(TARGET) && cd tests/tcg/$(TARGET) && \
 	   $(MAKE) -f $(TCG_MAKE) TARGET="$(TARGET)" CC=$(DOCKER_COMPILE_CMD) \
+			$(if $(DOCKER_AS_CMD),AS=$(DOCKER_AS_CMD)) \
+			$(if $(DOCKER_LD_CMD),LD=$(DOCKER_LD_CMD)) \
 			SRC_PATH="$(SRC_PATH)" BUILD_STATIC=y \
 			EXTRA_CFLAGS="$(CROSS_CC_GUEST_CFLAGS)"), \
 	"BUILD","$(TARGET) guest-tests with docker qemu/$(DOCKER_IMAGE)")

tests/tcg/configure.sh

@@ -75,7 +75,13 @@ fi
 for target in $target_list; do
   arch=${target%%-*}
 
+  # reset all container fields
   container_image=
+  container_hosts=
+  container_cross_cc=
+  container_cross_as=
+  container_cross_ld=
+
   case $target in
     aarch64-*)
       # We don't have any bigendian build tools so we only use this for AArch64
@@ -273,7 +279,16 @@ for target in $target_list; do
       for host in $container_hosts; do
           if test "$host" = "$ARCH"; then
               echo "DOCKER_IMAGE=$container_image" >> $config_target_mak
-              echo "DOCKER_CROSS_CC_GUEST=$container_cross_cc" >> $config_target_mak
+              echo "DOCKER_CROSS_CC_GUEST=$container_cross_cc" >> \
+                   $config_target_mak
+              if test -n "$container_cross_as"; then
+                  echo "DOCKER_CROSS_AS_GUEST=$container_cross_as" >> \
+                      $config_target_mak
+              fi
+              if test -n "$container_cross_ld"; then
+                  echo "DOCKER_CROSS_LD_GUEST=$container_cross_ld" >> \
+                      $config_target_mak
+              fi
           fi
       done
   fi