Separate Impress Remote from Android build.

Previously the Impress Remote app could only be built within
gbuild when building the entirety of LO for Android, it can
now be enabled separately to be built within any LO build.

(Note that the app could still be built separately without doing a
full Android build of LO by using the android build tools and/or IDE.)

Conflicts:
	config_host.mk.in

Change-Id: I21d4389082a1492a3c9029d630f3fff97d9ba99a
Reviewed-on: https://gerrit.libreoffice.org/6146Reviewed-by: Björn Michaelsen <bjoern.michaelsen@canonical.com>
Tested-by: Björn Michaelsen <bjoern.michaelsen@canonical.com>

android/Module_android.mk

@@ -8,10 +8,17 @@
 
 $(eval $(call gb_Module_Module,android))
 
-ifeq ($(OS),ANDROID)
+ifeq ($(ENABLE_SDREMOTE_ANDROID),TRUE)
 
 $(eval $(call gb_Module_add_targets,android,\
     CustomTarget_sdremote \
+))
+
+endif
+
+ifeq ($(OS),ANDROID)
+
+$(eval $(call gb_Module_add_targets,android,\
     CustomTarget_lo4android \
     CustomTarget_android_desktop \
 ))

config_host.mk.in

@@ -160,6 +160,7 @@ export ENABLE_SCRIPTING_JAVASCRIPT=@ENABLE_SCRIPTING_JAVASCRIPT@
 export ENABLE_SDREMOTE=@ENABLE_SDREMOTE@
 export ENABLE_SDREMOTE_BLUETOOTH=@ENABLE_SDREMOTE_BLUETOOTH@
 export SYSTEM_BLUEZ=@SYSTEM_BLUEZ@
+export ENABLE_SDREMOTE_ANDROID=@ENABLE_SDREMOTE_ANDROID@
 export ENABLE_SILENT_MSI=@ENABLE_SILENT_MSI@
 export ENABLE_SYMBOLS=@ENABLE_SYMBOLS@
 export ENABLE_SYSTRAY_GTK=@ENABLE_SYSTRAY_GTK@

configure.ac

@@ -210,7 +210,8 @@ AC_ARG_WITH(android-ndk-toolchain-version,
 
 AC_ARG_WITH(android-sdk,
     AS_HELP_STRING([--with-android-sdk],
-        [Specify location of the Android SDK. Mandatory when building for Android.]),
+        [Specify location of the Android SDK. Mandatory when building for Android,
+        or when building the Impress Remote Android app.]),
 ,)
 
 ANDROID_NDK_HOME=
@@ -660,19 +661,11 @@ linux-android*)
         AC_MSG_ERROR([the --with-android-ndk-toolchain-version option is mandatory])
     fi
 
-    if test -z "$with_android_sdk"; then
-        AC_MSG_ERROR([the --with-android-sdk option is mandatory])
-    fi
-
     # Verify that the NDK and SDK options are proper
     if test ! -f "$ANDROID_NDK_HOME/platforms/android-9/arch-arm/usr/lib/libc.a"; then
         AC_MSG_ERROR([the --with-android-ndk option does not point to an Android NDK])
     fi
 
-    if test ! -d "$ANDROID_SDK_HOME/platforms"; then
-        AC_MSG_ERROR([the --with-android-sdk option does not point to an Android SDK])
-    fi
-
     AC_DEFINE(HAVE_FT_FACE_GETCHARVARIANTINDEX)
     BUILD_TYPE="$BUILD_TYPE FONTCONFIG FREETYPE"
     ;;
@@ -682,6 +675,16 @@ linux-android*)
     ;;
 esac
 
+if echo "$host_os" | grep -q linux-android || test "$enable_sdremote_android" = "yes"; then
+    if test -z "$with_android_sdk"; then
+        AC_MSG_ERROR([the --with-android-sdk option is mandatory])
+    fi
+
+    if test ! -d "$ANDROID_SDK_HOME/platforms"; then
+        AC_MSG_ERROR([the --with-android-sdk option does not point to an Android SDK])
+    fi
+fi
+
 if test "$_os" = "AIX"; then
     AC_PATH_PROG(GAWK, gawk)
     if test -z "$GAWK"; then
@@ -997,7 +1000,7 @@ AC_ARG_ENABLE(packagekit,
 
 AC_ARG_ENABLE(sdremote,
     AS_HELP_STRING([--disable-sdremote],
-        [Determines whether to enable Impress remote control.]),
+        [Determines whether to enable Impress remote control (i.e. the server component).]),
 ,enable_sdremote=yes)
 
 AC_ARG_ENABLE(sdremote-bluetooth,
@@ -1005,6 +1008,12 @@ AC_ARG_ENABLE(sdremote-bluetooth,
         [Determines whether to build sdremote with bluetooth support.
          Requires dbus on Linux.]))
 
+AC_ARG_ENABLE(sdremote-android,
+    AS_HELP_STRING([--enable-sdremote-android],
+        [Determines whether to build the Impress Remote Android app -- requires
+        a correctly configured android sdk. Automatically enabled if ]),
+,enable_sdremote_android=no)
+
 AC_ARG_ENABLE(gconf,
     AS_HELP_STRING([--disable-gconf],
         [Determines whether to use the GConf support.]),
@@ -10116,6 +10125,17 @@ AC_SUBST(ENABLE_SDREMOTE)
 AC_SUBST(ENABLE_SDREMOTE_BLUETOOTH)
 AC_SUBST(SYSTEM_BLUEZ)
 
+AC_MSG_CHECKING([whether to enable Impress remote control android app])
+if echo "$host_os" | grep -q linux-android || test "$enable_sdremote_android" = "yes"; then
+    AC_MSG_RESULT([yes])
+    ENABLE_SDREMOTE_ANDROID=TRUE
+    AC_MSG_CHECKING([whether to enable Bluetooth support in Impress remote control])
+else
+    ENABLE_SDREMOTE=
+    AC_MSG_RESULT([no])
+fi
+AC_SUBST(ENABLE_SDREMOTE_ANDROID)
+
 dnl ===================================================================
 dnl Check whether the gtk 2.0 libraries are available.
 dnl ===================================================================