Do not require a cross-compiler prefix for e.g. i386 on x86_64, or
big endian on little endian.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 configure | 34 +++++++++++++++++++++-------------
 1 file changed, 21 insertions(+), 13 deletions(-)

diff --git a/configure b/configure
index b1aa97e470..28f8c6188b 100755
--- a/configure
+++ b/configure
@@ -2058,19 +2058,27 @@ probe_target_compiler() {
   compute_target_variable $1 target_objcopy objcopy
   compute_target_variable $1 target_ranlib ranlib
   compute_target_variable $1 target_strip strip
-  if test "$1" = $cpu; then
-    : ${target_cc:=$cc}
-    : ${target_ccas:=$ccas}
-    : ${target_as:=$as}
-    : ${target_ld:=$ld}
-    : ${target_ar:=$ar}
-    : ${target_as:=$as}
-    : ${target_ld:=$ld}
-    : ${target_nm:=$nm}
-    : ${target_objcopy:=$objcopy}
-    : ${target_ranlib:=$ranlib}
-    : ${target_strip:=$strip}
-  fi
+  case "$1:$cpu" in
+    aarch64:aarch64_be | aarch64_be:aarch64 | \
+    arm:armeb | armeb:arm | \
+    i386:x86_64 | \
+    ppc:ppc64* | \
+    ppc64*:ppc64* | \
+    sparc:sparc64 | \
+    "$cpu:$cpu")
+      : ${target_cc:=$cc}
+      : ${target_ccas:=$ccas}
+      : ${target_as:=$as}
+      : ${target_ld:=$ld}
+      : ${target_ar:=$ar}
+      : ${target_as:=$as}
+      : ${target_ld:=$ld}
+      : ${target_nm:=$nm}
+      : ${target_objcopy:=$objcopy}
+      : ${target_ranlib:=$ranlib}
+      : ${target_strip:=$strip}
+      ;;
+  esac
   if test -n "$target_cc"; then
     case $1 in
       i386|x86_64)
-- 
2.36.1