If the user has set the QEMU_COMMAND environment variable,
then use it when running QEMU. This can be useful for running
OVMF with development builds of QEMU.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <[email protected]>
---
 OvmfPkg/build.sh |   14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/OvmfPkg/build.sh b/OvmfPkg/build.sh
index d35d2e0..f3eb97c 100755
--- a/OvmfPkg/build.sh
+++ b/OvmfPkg/build.sh
@@ -143,7 +143,12 @@ done
 case $PROCESSOR in
   IA32)
     Processor=Ia32
-    if  [ -x `which qemu-system-i386` ]; then
+    if [ -n "$QEMU_COMMAND" ]; then
+      #
+      # The user set the QEMU_COMMAND variable. We'll use it to run QEMU.
+      #
+      :
+    elif  [ -x `which qemu-system-i386` ]; then
       QEMU_COMMAND=qemu-system-i386
     elif  [ -x `which qemu-system-x86_64` ]; then
       QEMU_COMMAND=qemu-system-x86_64
@@ -156,7 +161,12 @@ case $PROCESSOR in
     ;;
   X64)
     Processor=X64
-    QEMU_COMMAND=qemu-system-x86_64
+    if [ -z "$QEMU_COMMAND" ]; then
+      #
+      # The user didn't set the QEMU_COMMAND variable.
+      #
+      QEMU_COMMAND=qemu-system-x86_64
+    fi
     ;;
   *)
     echo Unsupported processor architecture: $PROCESSOR
-- 
1.7.10.4


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