Remove built-in libmpeg2 (only support external dependency)

Author: FrodeSolheim

Makefile.am

@@ -1558,13 +1558,7 @@ endif
 #	softfloat/softfloatx80.h
 #endif
 
-if BUILTIN_LIBMPEG2
-SUBDIRS += libmpeg2
-AM_CPPFLAGS += -I$(s)/libmpeg2/include
-fs_uae_LDADD += \
-	libmpeg2/libmpeg2/.libs/libmpeg2.a \
-	libmpeg2/libmpeg2/convert/.libs/libmpeg2convert.a
-else
+if WITH_LIBMPEG2
 CM_CFLAGS += @LIBMPEG2_CFLAGS@
 LIBS += @LIBMPEG2_LIBS@
 endif

bootstrap

@@ -1,9 +1,5 @@
 #!/bin/sh
 set -e
-echo "Bootstrapping libmpeg2..."
-cd libmpeg2
-./bootstrap
-cd ..
 echo "Boostrapping fs-uae..."
 # version number is cached in autom4te.cache
 rm -Rf autom4te.cache

configure.ac

@@ -225,15 +225,12 @@ AS_IF([test "x$with_glew" = xyes], [
 ])
 
 AC_ARG_WITH(libmpeg2, AS_HELP_STRING(
-    [--without-libmpeg2], [or --with-libmpeg2=builtin to use included version]))
-AM_CONDITIONAL([BUILTIN_LIBMPEG2], [test x$with_libmpeg2 = xbuiltin])
+    [--without-libmpeg2], [Disable libmpeg2 usage]))
 AS_IF([test "x$with_libmpeg2" != xno], [
-    AS_IF([test "x$with_libmpeg2" = xbuiltin], [
-    ], [
-        PKG_CHECK_MODULES([LIBMPEG2], [libmpeg2 libmpeg2convert])
-    ])
+    PKG_CHECK_MODULES([LIBMPEG2], [libmpeg2 libmpeg2convert])
     AC_DEFINE([WITH_LIBMPEG2], [1], [Define to 1 to use libmpeg2])
 ])
+AM_CONDITIONAL([WITH_LIBMPEG2], [test x$with_libmpeg2 != xno])
 
 AM_CONDITIONAL([BUILTIN_MANYMOUSE], [true])
 
@@ -880,8 +877,6 @@ OPT_FEATURE([A_ZIP], [zip], [zip],
 
 AC_DEFINE([FPU_UAE], [1], [Define to 1])
 
-AC_CONFIG_SUBDIRS([libmpeg2])
-
 # Write Makefile
 
 AC_CONFIG_FILES([