[Qemu-devel] [PATCH] configure: Don't permit SDL or GTK on OSX

[Peter Maydell <peter.maydell@linaro.org>]

The cocoa GUI frontend assumes it is the only GUI (it redefines
main() so it always gets control before the rest of QEMU), so
it does not play well with other UIs like SDL or GTK. (Mostly
people building QEMU on OSX don't have the necessary dependencies
available for configure to build those other front ends, so
mostly this problem goes unnoticed.)

Make configure automatically disable the SDL and GTK front ends
if the cocoa front end is enabled. (We were sort of attempting
to do this for SDL before, but not in a way that worked very well.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
In an ideal world, we'd fix the Cocoa UI front end to play nicely
with others, but in the meantime, let's at least give a helpful
message to users if they try to select combinations of configure
options that won't work.

 configure | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/configure b/configure
index cd219d8..826858e 100755
--- a/configure
+++ b/configure
@@ -956,7 +956,6 @@ for opt do
   ;;
   --enable-cocoa)
       cocoa="yes" ;
-      sdl="no" ;
       audio_drv_list="coreaudio `echo $audio_drv_list | sed s,coreaudio,,g`"
   ;;
   --disable-system) softmmu="no"
@@ -1711,6 +1710,21 @@ else
 fi
 
 ##########################################
+# cocoa implies not SDL or GTK
+# (the cocoa UI code currently assumes it is always the active UI
+# and doesn't interact well with other UI frontend code)
+if test "$cocoa" = "yes"; then
+    if test "$sdl" = "yes"; then
+        error_exit "Cocoa and SDL UIs cannot both be enabled at once"
+    fi
+    if test "$gtk" = "yes"; then
+        error_exit "Cocoa and GTK UIs cannot both be enabled at once"
+    fi
+    gtk=no
+    sdl=no
+fi
+
+##########################################
 # L2TPV3 probe
 
 cat > $TMPC <<EOF
@@ -2287,9 +2301,7 @@ EOF
     if test "$_sdlversion" -lt 121 ; then
       sdl_too_old=yes
     else
-      if test "$cocoa" = "no" ; then
-        sdl=yes
-      fi
+      sdl=yes
     fi
 
     # static link with sdl ? (note: sdl.pc's --static --libs is broken)
-- 
1.9.1