* modules/demux/mkv.cpp: Patch by Steve Lhomme (steve dot lhomme at free dot...

* modules/demux/mkv.cpp: Patch by Steve Lhomme (steve dot lhomme at free dot fr) to allow the Matroska demuxer to find all files in the same "family" in the same directory as the source file.
This will be useful to find segments corresponding to the different titles/domains (as in DVDs).

configure.ac

@@ -303,7 +303,7 @@ need_libc=false
 AC_CHECK_FUNCS(gettimeofday select strerror strtod strtol strtof strtoll strtoull isatty vasprintf asprintf swab sigrelse getpwuid memalign posix_memalign gethostbyname2 if_nametoindex atoll getenv putenv setenv gmtime_r ctime_r localtime_r lrintf daemon)
 
 dnl Check for usual libc functions
-AC_CHECK_FUNCS(strdup strndup atof lseek)
+AC_CHECK_FUNCS(strdup strndup atof)
 AC_CHECK_FUNCS(strcasecmp,,[AC_CHECK_FUNCS(stricmp)])
 AC_CHECK_FUNCS(strncasecmp,,[AC_CHECK_FUNCS(strnicmp)])
 AC_CHECK_FUNCS(strcasestr,,[AC_CHECK_FUNCS(stristr)])
@@ -1756,7 +1756,25 @@ AC_ARG_ENABLE(mkv,
 if test "${enable_mkv}" != "no" -a "${CXX}" != ""; then
   AC_LANG_PUSH(C++)
   AC_CHECK_HEADERS(ebml/EbmlVersion.h, [
+    AC_MSG_CHECKING(for libebml version >= 0.7.3)
+    AC_EGREP_CPP(yes,
+      [#include <ebml/EbmlVersion.h>
+       #ifdef LIBEBML_VERSION
+       #if LIBEBML_VERSION >= 0x000703
+       yes
+       #endif
+       #endif],
+      [AC_MSG_RESULT([yes])
         AC_CHECK_HEADERS(matroska/KaxVersion.h, [
+          AC_MSG_CHECKING(for libmatroska version >= 0.7.5)
+          AC_EGREP_CPP(yes,
+            [#include <matroska/KaxVersion.h>
+             #ifdef LIBMATROSKA_VERSION
+             #if LIBMATROSKA_VERSION >= 0x000705
+             yes
+             #endif
+             #endif],
+            [AC_MSG_RESULT([yes])
               AC_CHECK_HEADERS(matroska/KaxAttachments.h)
               VLC_ADD_CXXFLAGS([mkv],[])
               AC_CHECK_LIB(ebml_pic, main, [
@@ -1770,6 +1788,14 @@ if test "${enable_mkv}" != "no" -a "${CXX}" != ""; then
                   VLC_ADD_LDFLAGS([mkv],[-lmatroska -lebml])
                 ])
               ])
+            ],
+            [AC_MSG_RESULT([no])
+              AC_MSG_ERROR([Your libmatroska is too old: you may get a more recent one from http://dl.matroska.org/downloads/libmatroska/. Alternatively you can use --disable-mkv to disable the matroska plugin.])
+          ])
+        ])
+      ],
+      [AC_MSG_RESULT([no])
+        AC_MSG_ERROR([Your libebml is too old: you may get a more recent one from http://dl.matroska.org/downloads/libebml/. Alternatively you can use --disable-mkv to disable the matroska plugin.])
     ])
   ])
   AC_LANG_POP(C++)