Enable plugin support via configure script

svn-id: r12895

Makefile.common

@@ -31,36 +31,12 @@ DEPDIR := .deps
 # Plugin settings
 ######################################################################
 
-# Whether to build plugins or now (TODO: should be set by configure script
-#BUILD_PLUGINS := 1
-
 # Plugin prefix. Typically "lib" on Unix, and nothing everywhere else
 PLUGIN_PREFIX := lib
 # Plugin suffix. For static/shared libs this is typically ".so"/".a" on Unix,
 # ".dll"/".lib" on Windows, ".bundle"/".a" on OS X, etc.
 PLUGIN_SUFFIX := .so
 
-ifdef BUILD_PLUGINS
-# TODO: The following stuff should be controlled by 'configure'
-
-# Define DYNAMIC_MODULES during building
-CXXFLAGS += -DDYNAMIC_MODULES
-
-# Uncomment these for Mac OS X
-#PLUGIN_LDFLAGS  += -bundle -bundle_loader $(EXECUTABLE)
-#PRE_OBJS_FLAGS  := -all_load
-#POST_OBJS_FLAGS := 
-#LIBS            += -ldl
-
-# Uncomment these for Linux
-CXXFLAGS        += -fpic
-PLUGIN_LDFLAGS  += -shared
-PRE_OBJS_FLAGS  := -Wl,-export-dynamic -Wl,-whole-archive
-POST_OBJS_FLAGS := -Wl,-no-whole-archive
-LIBS            += -ldl
-
-endif
-
 ######################################################################
 # Module settings
 ######################################################################

common.rules

@@ -10,7 +10,7 @@ ifdef PLUGIN
 # one of several build rules
 PLUGIN-$(MODULE) := $(MODULE)/$(PLUGIN_PREFIX)$(MODULE)$(PLUGIN_SUFFIX)
 $(PLUGIN-$(MODULE)): $(MODULE_OBJS) $(EXECUTABLE)
-	$(CXX) $(PLUGIN_LDFLAGS) $(filter-out $(EXECUTABLE),$+) $(LIBS) -o $@
+	$(CXX) $(PLUGIN_LDFLAGS) $(filter-out $(EXECUTABLE),$+) -o $@
 PLUGIN:=
 plugins: $(PLUGIN-$(MODULE))
 

configure

@@ -38,6 +38,7 @@ _build_sword1=yes
 _build_sword2=yes
 _build_queen=yes
 _need_memalign=no
+_build_plugins=no
 # more defaults
 _backend=sdl
 _ranlib=ranlib
@@ -193,19 +194,26 @@ Optional Features:
   --disable-sword1         don't build the Broken Sword I engine
   --disable-sword2         don't build the Broken Sword II engine
   --disable-queen          don't build the Flight of the Amazon Queen engine
+  --enable-plugins         build engines as loadable mdoules instead of
+                           static linking them
 
 Optional Libraries:
   --with-alsa-prefix=PFX   Prefix where alsa is installed (optional)
   --disable-alsa           disable ALSA midi sound support [autodetect]
+
   --with-ogg-prefix=PFX    Prefix where libogg is installed (optional)
   --with-vorbis-prefix=PFX Prefix where libvorbis is installed (optional)
   --disable-vorbis         disable Ogg Vorbis support [autodetect]
+
   --with-mad-prefix=PFX    Prefix where libmad is installed (optional)
   --disable-mad            disable libmad (MP3) support [autodetect]
+
   --with-zlib-prefix=PFX   Prefix where zlib is installed (optional)
   --disable-zlib           disable zlib (compression) support [autodetect]
-  --disable-mpeg2          disable mpeg2 codec for cutscenes [autodetect]
+
   --with-mpeg2-prefix=PFX  Prefix where libmpeg2 is installed (optional)
+  --disable-mpeg2          disable mpeg2 codec for cutscenes [autodetect]
+
   --with-sdl-prefix=PFX    Prefix where the sdl-config script is installed
 
 Some influential environment variables:
@@ -240,6 +248,7 @@ for ac_option in $@; do
       --enable-zlib)		_zlib=yes	;;
       --disable-zlib)		_zlib=no	;;
       --disable-mpeg2)          _mpeg2=no       ;;
+      --enable-plugins)         _build_plugins=yes ;;
       --with-mpeg2-prefix=*)
 	_prefix=`echo $ac_option | cut -d '=' -f 2`
 	MPEG2_CFLAGS="-I$_prefix/include"
@@ -556,6 +565,44 @@ EOF
     
 fi
 
+#
+# Check whether plugin support is requested and possible
+#
+echocheck "Plugin support"
+_mak_plugins=
+if test "$_build_plugins" = yes ; then
+    case $hosttype in
+	Linux)
+_mak_plugins='
+BUILD_PLUGINS := 1
+CXXFLAGS      += -DDYNAMIC_MODULES
+CXXFLAGS        += -fpic
+PLUGIN_LDFLAGS  += -shared
+PRE_OBJS_FLAGS  := -Wl,-export-dynamic -Wl,-whole-archive
+POST_OBJS_FLAGS := -Wl,-no-whole-archive
+LIBS            += -ldl
+'
+	    ;;
+	Darwin)
+_mak_plugins='
+BUILD_PLUGINS := 1
+CXXFLAGS      += -DDYNAMIC_MODULES
+PLUGIN_LDFLAGS  += -bundle -bundle_loader $(EXECUTABLE)
+PRE_OBJS_FLAGS  := -all_load
+POST_OBJS_FLAGS :=
+LIBS            += -ldl
+'
+	    ;;
+	*)
+	    _build_plugins=no
+	    ;;
+    esac
+fi
+echo "$_build_plugins"
+
+#
+# Check for Ogg Vorbis
+#
 echocheck "Ogg Vorbis"
 if test "$_vorbis" = auto ; then
   _vorbis=no
@@ -575,6 +622,9 @@ else
 fi
 echo "$_vorbis"
 
+#
+# Check for MAD (MP3 library)
+#
 echocheck "MAD"
 if test "$_mad" = auto ; then
   _mad=no
@@ -593,6 +643,9 @@ else
 fi
 echo "$_mad"
 
+#
+# Check for ALSA
+#
 echocheck "ALSA >= 0.9"
 if test "$_alsa" = auto ; then
   _alsa=no
@@ -611,6 +664,9 @@ else
 fi
 echo "$_alsa"
 
+#
+# Check for ZLib
+#
 echocheck "zlib"
 if test "$_zlib" = auto ; then
   _zlib=no
@@ -630,6 +686,9 @@ else
 fi
 echo "$_zlib"
 
+#
+# Check for LibMPEG2
+#
 echocheck "libmpeg2 >= 0.3.2"
 if test "$_mpeg2" = auto ; then
   _mpeg2=no
@@ -659,6 +718,9 @@ fi
 echo "$_mpeg2"
 rm -f $TMPC $TMPO
 
+#
+# Check which engines ("frontends") are to be built
+#
 echo
 echo "Engines:"
 if test "$_build_scumm" = yes ; then
@@ -767,6 +829,7 @@ BACKEND := $_backend
 MODULES += $MODULES
 MODULE_DIRS += $MODULE_DIRS
 
+$_mak_plugins
 $_make_def_HAVE_GCC3
 $_mak_scumm
 $_mak_simon