build: Disable some unnecessary features

build.sh

@@ -123,6 +123,17 @@ set -x # Print commands from now on
     --disable-lzo \
     --disable-smartcard \
     --disable-usb-redir \
+    --disable-bochs \
+    --disable-cloop \
+    --disable-dmg \
+    --disable-vdi \
+    --disable-vvfat \
+    --disable-qcow1 \
+    --disable-qed \
+    --disable-parallels \
+    --disable-sheepdog \
+    --without-default-devices \
+    --disable-blobs \
     ${user_opts}
 
 time make -j"${job_count}" subdir-i386-softmmu 2>&1 | tee build.log

default-configs/i386-softmmu.mak

@@ -25,3 +25,4 @@
 CONFIG_ISAPC=y
 CONFIG_I440FX=y
 CONFIG_Q35=y
+CONFIG_XBOX=y

hw/i386/Kconfig

@@ -99,3 +99,9 @@ config VMPORT
 config VMMOUSE
     bool
     depends on VMPORT
+
+config XBOX
+    select PC
+    select USB_OHCI
+    select USB_STORAGE_BOT
+    select AC97