configure.ac: require LLVM for r300g on x86 and x86_64

diff --git a/configure.ac b/configure.ac
index d8c50ce..1012ca5 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1780,9 +1780,16 @@ dnl Gallium Radeon r300g configuration
 dnl
 AC_ARG_ENABLE([gallium-r300],
     [AS_HELP_STRING([--enable-gallium-r300],
-        [build gallium r300 @<:@default=DRI-only@:>@])],
+        [build gallium r300 @<:@default=build DRI driver only@:>@])],
     [enable_gallium_r300="$enableval"],
     [enable_gallium_r300=auto])
+if test "x$enable_gallium_r300" != xno; then
+    if test "x$MESA_LLVM" = x0; then
+        case "$host_cpu" in
+        i*86|x86_64) AC_MSG_ERROR([LLVM is required to build Gallium R300 on x86 and x86_64]);;
+        esac
+    fi
+fi
 if test "x$enable_gallium_r300" = xauto; then
     GALLIUM_DRIVERS_DIRS="$GALLIUM_DRIVERS_DIRS r300"
     gallium_check_st "radeon/drm" "dri-r300"