64-bit emulator

Patch to allow emulator searches for emulator64-${ARCH} first on
64-bit OS.  If none is found, the original behavior which searchs
for 32-bit emulator-${ARCH} is performed as usual.

64-bit emulator (which still emulates Android built in 32-bit) offers
up to 20% speedup compared to its 32-bit counterpart.

Details:

android/main-emulator.c
 1) search emulator64 based on the OS
 2) dlopen lib64OpenglRender in 64-bit

Makefile.*
 1) Rules to build 64-bit executable emulator64-{x86,arm} and libraries
    emulator64-{libui,libqemu,target-i386,target-arm,libelff,common}
 2) remove -Wa,-32
 3) Changes prebuit toolchain path

android-configure.h
android/build/common.h
 1) no longer force 32-bit build (because now prebuilts/tools/gcc-sdk/gcc
    can now handle 64-bit
 2) set ANDROID_PREBUILTS to correctly locate ccache

android/config/*/config-host.h
 1) Detect HOST_X86_64 and HOST_X86_64/HOST_I386

Misc 64-bit porting clean-up
 1) use %zx to print variable of type size_t in hex
 2) use %zu to print variable of type size_t in dec
 3) Initialize query_parm to NULL
 4) use PRIu64 to replace PDUd64
 5) use PRId64/PRIu64/PRIX64 to print 64-bit
 6) drop PRUx64 because PRIx64 does the same
 7) cast pointer arith to intptr_t before casting to int
 8) fixed 1ULL<<63

Change-Id: Ife62a20063a6ec38d4a9b23977e840af1fce149a

1 files changed, 18 insertions, 3 deletions

diff --git a/android/build/common.sh b/android/build/common.sh
index de4e3c1..c7235ae 100644
--- a/android/build/common.sh
+++ b/android/build/common.sh
@@ -493,21 +493,20 @@ get_android_abs_build_var ()
 # Locate the Android prebuilt directory for your os
 # you should only call this if IN_ANDROID_BUILD is "yes"
 #
-# This will set ANDROID_PREBUILT_HOST_TAG and ANDROID_PREBUILT
+# This will set ANDROID_PREBUILT_HOST_TAG, ANDROID_PREBUILT and ANDROID_PREBUILTS
 #
 locate_android_prebuilt ()
 {
     # locate prebuilt directory
     ANDROID_PREBUILT_HOST_TAG=$OS
     ANDROID_PREBUILT=$ANDROID_TOP/prebuilt/$ANDROID_PREBUILT_HOST_TAG
+    ANDROID_PREBUILTS=$ANDROID_TOP/prebuilts/misc/$ANDROID_PREBUILT_HOST_TAG
     if [ ! -d $ANDROID_PREBUILT ] ; then
         # this can happen when building on x86_64
         case $OS in
             linux-x86_64)
                 ANDROID_PREBUILT_HOST_TAG=linux-x86
                 ANDROID_PREBUILT=$ANDROID_TOP/prebuilt/$ANDROID_PREBUILT_HOST_TAG
-                log "Forcing usage of 32-bit prebuilts"
-                force_32bit_binaries
                 ;;
             *)
         esac
@@ -516,7 +515,22 @@ locate_android_prebuilt ()
             exit 1
         fi
     fi
+    if [ ! -d $ANDROID_PREBUILTS ] ; then
+        # this can happen when building on x86_64
+        case $OS in
+            linux-x86_64)
+                ANDROID_PREBUILT_HOST_TAG=linux-x86
+                ANDROID_PREBUILTS=$ANDROID_TOP/prebuilts/misc/$ANDROID_PREBUILT_HOST_TAG
+                ;;
+            *)
+        esac
+        if [ ! -d $ANDROID_PREBUILTS ] ; then
+            echo "Can't find the prebuilts directory $ANDROID_PREBUILTS in Android build"
+            exit 1
+        fi
+    fi
     log "Prebuilt   : ANDROID_PREBUILT=$ANDROID_PREBUILT"
+    log "Prebuilts  : ANDROID_PREBUILTS=$ANDROID_PREBUILTS"
 }
 
 ## Build configuration file support
@@ -561,6 +575,7 @@ add_android_config_mk ()
     fi
     echo "HOST_PREBUILT_TAG := $HOST_TAG" >> $config_mk
     echo "PREBUILT          := $ANDROID_PREBUILT" >> $config_mk
+    echo "PREBUILTS         := $ANDROID_PREBUILTS" >> $config_mk
 }
 
 # Find pattern $1 in string $2