[Qemu-devel] [PATCH v2 01/15] configure: add the disable-tcg option

[Yang Zhong]

Add the disable-tcg option into configure and echo CONFIG_TCG=y into
$config_target_mak. The default tcg is enabled for all build, only i386
and x86_64 softmmu option can be disabled. This operation do not make
big change with the older build command.

The new configure build command like below
(1)./configure
   tcg is defaultly enabled

(2)./configure --disable-tcg --target-list=x86_64-softmmu
   tcg is disabled in x86_64-softmmu

(3)./configure --disable-tcg --target-list=i386-softmmu
   tcg is disabled in i386-softmmu

If the --target-list include other softmmus or user options, the configure
command will report error and configure is aborted.
The error as:
ERROR: The current aarch64-softmmu can't support disable-tcg,
    only i386-softmmu|x86_64-softmmu support disable-tcg
or
ERROR: The user build can't support disable-tcg,
    only i386-softmmu|x86_64-softmmu support disable-tcg

Signed-off-by: Yang Zhong <address@hidden>
---
 configure | 43 ++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 42 insertions(+), 1 deletion(-)

diff --git a/configure b/configure
index c571ad1..61ce514 100755
--- a/configure
+++ b/configure
@@ -224,6 +224,7 @@ cap_ng=""
 attr=""
 libattr=""
 xfs=""
+tcg="yes"
 
 vhost_net="no"
 vhost_scsi="no"
@@ -953,6 +954,10 @@ for opt do
   ;;
   --enable-hax) hax="yes"
   ;;
+  --disable-tcg) tcg="no"
+  ;;
+  --enable-tcg) tcg="yes"
+  ;;
   --disable-tcg-interpreter) tcg_interpreter="no"
   ;;
   --enable-tcg-interpreter) tcg_interpreter="yes"
@@ -1715,6 +1720,24 @@ case " $target_list " in
   ;;
 esac
 
+if test "$tcg" = "no"; then
+   for target in $target_list; do
+      if test "$softmmu" = "yes"; then
+        case $target in
+           i386-softmmu|x86_64-softmmu)
+           ;;
+        *)
+           error_exit "The current $target can't support disable-tcg,"\
+              "only i386-softmmu|x86_64-softmmu support disable-tcg"
+           ;;
+        esac
+     else
+        error_exit "The user build can't support disable-tcg,"\
+           "only i386-softmmu|x86_64-softmmu support disable-tcg"
+     fi
+   done
+fi
+
 feature_not_found() {
   feature=$1
   remedy=$2
@@ -5119,7 +5142,6 @@ echo "module support    $modules"
 echo "host CPU          $cpu"
 echo "host big endian   $bigendian"
 echo "target list       $target_list"
-echo "tcg debug enabled $debug_tcg"
 echo "gprof enabled     $gprof"
 echo "sparse enabled    $sparse"
 echo "strip binaries    $strip_opt"
@@ -5173,6 +5195,11 @@ echo "Linux AIO support $linux_aio"
 echo "ATTR/XATTR support $attr"
 echo "Install blobs     $blobs"
 echo "KVM support       $kvm"
+echo "TCG support       $tcg"
+if test "$tcg" = "yes" ; then
+    echo "TCG debug enabled $debug_tcg"
+    echo "TCG interpreter   $tcg_interpreter"
+fi
 echo "HAX support       $hax"
 echo "RDMA support      $rdma"
 echo "TCG interpreter   $tcg_interpreter"
@@ -6231,6 +6258,7 @@ fi
 if test "$target_user_only" = "yes" ; then
   echo "CONFIG_USER_ONLY=y" >> $config_target_mak
   echo "CONFIG_QEMU_INTERP_PREFIX=\"$interp_prefix1\"" >> $config_target_mak
+  echo "CONFIG_TCG=y" >> $config_target_mak
 fi
 if test "$target_linux_user" = "yes" ; then
   echo "CONFIG_LINUX_USER=y" >> $config_target_mak
@@ -6250,6 +6278,19 @@ if test "$target_bsd_user" = "yes" ; then
   echo "CONFIG_BSD_USER=y" >> $config_target_mak
 fi
 
+if test "$target_softmmu" = "yes" ; then
+   case "$target_name" in
+     i386|x86_64)
+       if test "$tcg" = "yes" ; then
+         echo "CONFIG_TCG=y" >> $config_target_mak
+       fi
+       ;;
+     *)
+       echo "CONFIG_TCG=y" >> $config_target_mak
+       ;;
+   esac
+fi
+
 # generate QEMU_CFLAGS/LDFLAGS for targets
 
 cflags=""
-- 
1.9.1