configure: don't enable ppc64abi32-linux-user by default

The user can still enable this explicitly but they will get a warning
at the end of configure for their troubles. This also drops any builds
of ppc64abi32 from our CI tests.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20200909112742.25730-7-alex.bennee@linaro.org>

configure

@@ -542,6 +542,8 @@ gettext=""
 bogus_os="no"
 malloc_trim=""
 
+deprecated_features=""
+
 # parse CC options first
 for opt do
   optarg=$(expr "x$opt" : 'x[^=]*=\(.*\)')
@@ -1720,26 +1722,25 @@ if [ "$bsd_user" = "yes" ]; then
     mak_wilds="${mak_wilds} $source_path/default-configs/*-bsd-user.mak"
 fi
 
-if test -z "$target_list_exclude"; then
-    for config in $mak_wilds; do
-        default_target_list="${default_target_list} $(basename "$config" .mak)"
-    done
-else
-    exclude_list=$(echo "$target_list_exclude" | sed -e 's/,/ /g')
-    for config in $mak_wilds; do
-        target="$(basename "$config" .mak)"
-        exclude="no"
-        for excl in $exclude_list; do
-            if test "$excl" = "$target"; then
-                exclude="yes"
-                break;
-            fi
-        done
-        if test "$exclude" = "no"; then
-            default_target_list="${default_target_list} $target"
+if test -z "$target_list_exclude" -a -z "$target_list"; then
+    # if the user doesn't specify anything lets skip deprecating stuff
+    target_list_exclude=ppc64abi32-linux-user
+fi
+
+exclude_list=$(echo "$target_list_exclude" | sed -e 's/,/ /g')
+for config in $mak_wilds; do
+    target="$(basename "$config" .mak)"
+    exclude="no"
+    for excl in $exclude_list; do
+        if test "$excl" = "$target"; then
+            exclude="yes"
+            break;
         fi
     done
-fi
+    if test "$exclude" = "no"; then
+        default_target_list="${default_target_list} $target"
+    fi
+done
 
 # Enumerate public trace backends for --help output
 trace_backend_list=$(echo $(grep -le '^PUBLIC = True$' "$source_path"/scripts/tracetool/backend/*.py | sed -e 's/^.*\/\(.*\)\.py$/\1/'))
@@ -7557,7 +7558,7 @@ TARGET_SYSTBL=""
 case "$target_name" in
   i386)
     mttcg="yes"
-	gdb_xml_files="i386-32bit.xml"
+    gdb_xml_files="i386-32bit.xml"
     TARGET_SYSTBL_ABI=i386
     TARGET_SYSTBL=syscall_32.tbl
   ;;
@@ -7667,6 +7668,7 @@ case "$target_name" in
     TARGET_SYSTBL_ABI=common,nospu,32
     echo "TARGET_ABI32=y" >> $config_target_mak
     gdb_xml_files="power64-core.xml power-fpu.xml power-altivec.xml power-spe.xml power-vsx.xml"
+    deprecated_features="ppc64abi32 ${deprecated_features}"
   ;;
   riscv32)
     TARGET_BASE_ARCH=riscv
@@ -8011,6 +8013,12 @@ fi
 touch ninjatool.stamp
 fi
 
+if test -n "${deprecated_features}"; then
+    echo "Warning, deprecated features enabled."
+    echo "Please see docs/system/deprecated.rst"
+    echo "  features: ${deprecated_features}"
+fi
+
 # Save the configure command line for later reuse.
 cat <<EOD >config.status
 #!/bin/sh