tests/tcg: don't iterate through other arch compilers

There should only be one compiler per architecture. Those cases where
the same compiler can deal with a different architecture should be
explicitly set for both cross_cc and docker configurations. Otherwise
you get strangeness like:

  --cross-cc-aarch64=/bin/false

causing the logic to attempt to use a locally available
arm-linux-gnueabihf-gcc rather than forcing the use of the docker
image which is what is implied by the command line option.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210512102051.12134-10-alex.bennee@linaro.org>

1 files changed, 59 insertions, 89 deletions

diff --git a/tests/tcg/configure.sh b/tests/tcg/configure.sh
index cf6062a..e6c1be5 100755
--- a/tests/tcg/configure.sh
+++ b/tests/tcg/configure.sh
@@ -74,35 +74,6 @@ fi
 
 for target in $target_list; do
   arch=${target%%-*}
-  case $arch in
-    arm|armeb)
-      arches=arm
-      ;;
-    aarch64|aarch64_be)
-      arches="aarch64 arm"
-      ;;
-    mips*)
-      arches=mips
-      ;;
-    ppc*)
-      arches=ppc
-      ;;
-    sh4|sh4eb)
-      arches=sh4
-      ;;
-    x86_64)
-      arches="x86_64 i386"
-      ;;
-    xtensa|xtensaeb)
-      arches=xtensa
-      ;;
-    alpha|cris|hexagon|hppa|i386|microblaze|microblazeel|m68k|openrisc|riscv64|s390x|sh4|sparc64)
-      arches=$target
-      ;;
-    *)
-      continue
-      ;;
-  esac
 
   container_image=
   case $target in
@@ -236,70 +207,69 @@ for target in $target_list; do
   echo "CROSS_CC_GUEST_CFLAGS=$target_compiler_cflags" >> $config_target_mak
 
   got_cross_cc=no
-  for i in $arch $arches; do
-    if eval test "x\${cross_cc_$i+yes}" != xyes; then
-      continue
-    fi
 
-    eval "target_compiler=\${cross_cc_$i}"
-    if ! has $target_compiler; then
-      continue
-    fi
-    write_c_skeleton
-    if ! do_compiler "$target_compiler" $target_compiler_cflags -o $TMPE $TMPC -static ; then
-      # For host systems we might get away with building without -static
-      if ! do_compiler "$target_compiler" $target_compiler_cflags -o $TMPE $TMPC ; then
-        continue
-      fi
-      echo "CROSS_CC_GUEST_STATIC=y" >> $config_target_mak
-    else
-      echo "CROSS_CC_GUEST_STATIC=y" >> $config_target_mak
-    fi
-    echo "CROSS_CC_GUEST=$target_compiler" >> $config_target_mak
+  if eval test "x\${cross_cc_$arch}" != xyes; then
+      eval "target_compiler=\${cross_cc_$arch}"
 
-    # Test for compiler features for optional tests. We only do this
-    # for cross compilers because ensuring the docker containers based
-    # compilers is a requirememt for adding a new test that needs a
-    # compiler feature.
-    case $target in
-        aarch64-*)
-            if do_compiler "$target_compiler" $target_compiler_cflags \
-               -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=armv8.3-a -o $TMPE $TMPC; then
-                echo "CROSS_CC_HAS_ARMV8_3=y" >> $config_target_mak
-            fi
-            if do_compiler "$target_compiler" $target_compiler_cflags \
-               -mbranch-protection=standard -o $TMPE $TMPC; then
-                echo "CROSS_CC_HAS_ARMV8_BTI=y" >> $config_target_mak
-            fi
-            if do_compiler "$target_compiler" $target_compiler_cflags \
-               -march=armv8.5-a+memtag -o $TMPE $TMPC; then
-                echo "CROSS_CC_HAS_ARMV8_MTE=y" >> $config_target_mak
-            fi
-        ;;
-        ppc*)
-            if do_compiler "$target_compiler" $target_compiler_cflags \
-               -mpower8-vector -o $TMPE $TMPC; then
-                echo "CROSS_CC_HAS_POWER8_VECTOR=y" >> $config_target_mak
-            fi
-        ;;
-        i386-linux-user)
-            if do_compiler "$target_compiler" $target_compiler_cflags \
-                -Werror -fno-pie -o $TMPE $TMPC; then
-                echo "CROSS_CC_HAS_I386_NOPIE=y" >> $config_target_mak
-            fi
-        ;;
-    esac
+      if has $target_compiler; then
+          write_c_skeleton
+          if ! do_compiler "$target_compiler" $target_compiler_cflags \
+                 -o $TMPE $TMPC -static ; then
+              # For host systems we might get away with building without -static
+              if do_compiler "$target_compiler" $target_compiler_cflags \
+                     -o $TMPE $TMPC ; then
+                  got_cross_cc=yes
+                  echo "CROSS_CC_GUEST_STATIC=y" >> $config_target_mak
+                  echo "CROSS_CC_GUEST=$target_compiler" >> $config_target_mak
+              fi
+          else
+              got_cross_cc=yes
+              echo "CROSS_CC_GUEST_STATIC=y" >> $config_target_mak
+              echo "CROSS_CC_GUEST=$target_compiler" >> $config_target_mak
+          fi
+      fi
+  fi
 
-    enabled_cross_compilers="$enabled_cross_compilers $target_compiler"
-    got_cross_cc=yes
-    break
-  done
+  if test $got_cross_cc = yes; then
+      # Test for compiler features for optional tests. We only do this
+      # for cross compilers because ensuring the docker containers based
+      # compilers is a requirememt for adding a new test that needs a
+      # compiler feature.
 
-  if test $got_cross_cc = no && test "$container" != no && test -n "$container_image"; then
+      case $target in
+          aarch64-*)
+              if do_compiler "$target_compiler" $target_compiler_cflags \
+                             -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=armv8.3-a -o $TMPE $TMPC; then
+                  echo "CROSS_CC_HAS_ARMV8_3=y" >> $config_target_mak
+              fi
+              if do_compiler "$target_compiler" $target_compiler_cflags \
+                             -mbranch-protection=standard -o $TMPE $TMPC; then
+                  echo "CROSS_CC_HAS_ARMV8_BTI=y" >> $config_target_mak
+              fi
+              if do_compiler "$target_compiler" $target_compiler_cflags \
+                             -march=armv8.5-a+memtag -o $TMPE $TMPC; then
+                  echo "CROSS_CC_HAS_ARMV8_MTE=y" >> $config_target_mak
+              fi
+              ;;
+          ppc*)
+              if do_compiler "$target_compiler" $target_compiler_cflags \
+                             -mpower8-vector -o $TMPE $TMPC; then
+                  echo "CROSS_CC_HAS_POWER8_VECTOR=y" >> $config_target_mak
+              fi
+              ;;
+          i386-linux-user)
+              if do_compiler "$target_compiler" $target_compiler_cflags \
+                             -Werror -fno-pie -o $TMPE $TMPC; then
+                  echo "CROSS_CC_HAS_I386_NOPIE=y" >> $config_target_mak
+              fi
+              ;;
+      esac
+  elif test $got_cross_cc = no && test "$container" != no && \
+          test -n "$container_image"; then
       for host in $container_hosts; do
           if test "$host" = "$ARCH"; then
               echo "DOCKER_IMAGE=$container_image" >> $config_target_mak