shiny new avifile test macro let's give it a ride

Original commit message from CVS:
shiny new avifile test macro
let's give it a ride

common

@@ -1 +1 @@
-Subproject commit 49b94b4d92a9621d42aa6c80bd720e2abc747fe4
+Subproject commit e400d0fc2780dac2ee516286893d4f312d065f86

m4/as-avifile.m4

@@ -0,0 +1,150 @@
+# AS_AVIFILE 0.1.0
+# CXXFLAGS and LIBS for avifile
+# taken from Autostar Sandbox, http://autostars.sourceforge.net/
+# constructed by careful cross-pollination from various sources and lots of
+# hard labour
+
+dnl Usage:
+dnl AS_AVIFILE(MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
+dnl Test for avifile, and defines 
+dnl - AVIFILE_CXXFLAGS (C++ compiler flags)
+dnl - AVIFILE_LDFLAGS (linker flags, stripping and path)
+dnl as well as set HAVE_AVIFILE to yes or no
+dnl
+dnl FIXME: should define AVIFILE_VERSION
+dnl
+dnl prerequisites: 
+dnl - working C++ compiler
+dnl - usable libstdc++
+dnl - AC_PATH_XTRA
+
+AC_DEFUN(AS_AVIFILE, 
+[
+  HAVE_AVIFILE="no"
+
+  dnl first look for avifile-config
+  AC_PATH_PROG(AVIFILE_CONFIG, avifile-config, no)
+  min_avifile_version=ifelse([$1], ,0.7.0,$1)
+  if test "x$AVIFILE_CONFIG" != "xno"; then
+    dnl now that we have it, we need to save libs and cflags
+    AVIFILE_LDFLAGS=`avifile-config --libs`
+    AVIFILE_CXXFLAGS=`avifile-config --cflags`
+    AC_SUBST(AVIFILE_LDFLAGS)
+    AC_SUBST(AVIFILE_CXXFLAGS)
+    HAVE_AVIFILE="yes"
+  fi
+
+  dnl we got this far, now start checking if we have the right version
+  if test "x$HAVE_AVIFILE" = "xyes";
+  then
+    AC_MSG_CHECKING(for avifile - version >= $min_avifile_version)
+    dnl first get the version number from avifile-config
+    avifile_major_version=`$AVIFILE_CONFIG $avifile_args --version | \
+         sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
+    avifile_minor_version=`$AVIFILE_CONFIG $avifile_args --version | \
+         sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
+    avifile_micro_version=`$AVIFILE_CONFIG $avifile_config_args --version | \
+         sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
+
+    dnl now run a short C app that tells us if the version is ok or not
+    dnl all of this is boilerplate code from other examples
+    rm -f conf.avifiletest
+    AC_TRY_RUN([
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+char*
+my_strdup (char *str)
+{
+  char *new_str;
+  
+  if (str)
+  {
+    new_str = (char *) malloc ((strlen (str) + 1) * sizeof (char));
+    strcpy (new_str, str);
+  }
+  else
+    new_str = NULL;
+  
+  return new_str;
+}
+
+int
+main ()
+{
+  int major, minor, micro;
+  char *tmp_version;
+
+  system ("touch conf.avifiletest");
+
+  /* HP/UX 9 (%@#!) writes to sscanf strings */
+  tmp_version = my_strdup ("$min_avifile_version");
+  if (sscanf (tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) 
+  {
+    printf ("%s, bad version string\n", "$min_avifile_version");
+    exit (1);
+  }
+  if (($avifile_major_version > major) ||
+     (($avifile_major_version == major) && ($avifile_minor_version > minor)) || 
+     (($avifile_major_version == major) && ($avifile_minor_version == minor) && ($avifile_micro_version >= micro)))
+    return 0;
+  else
+  {
+    printf ("\n*** 'avifile-config --version' returned %d.%d.%d, but the minimum version\n", $avifile_major_version, $avifile_minor_version, $avifile_micro_version); 
+    printf ("*** of AVIFILE required is %d.%d.%d. If avifile-config is correct, then it is\n", major, minor, micro);
+    printf ("*** best to upgrade to the required version.\n");
+    printf ("*** If avifile-config was wrong, set the environment variable AVIFILE_CONFIG\n");
+    printf ("*** to point to the correct copy of avifile-config, and remove the file\n");
+    printf ("*** config.cache (if it exists) before re-running configure\n");
+    return 1;
+  }
+}
+    ], 
+    [ 
+      AC_MSG_RESULT(yes)
+      HAVE_AVIFILE="yes"
+    ],
+    [ 
+      HAVE_AVIFILE="no"
+    ])
+  fi
+  if test "x$HAVE_AVIFILE" = "xyes";
+  then
+    dnl now try to compile a sample test app
+
+    dnl first save whatever language we're currently testing in
+    dnl AC_LANG_SAVE
+    dnl AC_LANG_CPLUSPLUS
+    AC_LANG_PUSH(C++)
+    ac_save_CXXFLAGS=$CXXFLAGS
+    ac_save_LDFLAGS=$LDFLAGS
+    dnl add X flags, because it looks like avifile needs libXv and libXxf86vm
+    CXXFLAGS="$XXCFLAGS $AVIFILE_CXXFLAGS" 
+    LDFLAGS="$LDFLAGS $AVIFILE_LDFLAGS $X_LIBS -lXv -lXxf86vm"
+
+    AC_MSG_CHECKING(compilation of avifile test program)
+    dnl try the compile
+    AC_TRY_LINK([
+#include <stdio.h>
+#include <stdlib.h>
+#include <avifile.h>
+#include <creators.h>
+      ],[ 
+/* function body */
+IVideoDecoder *decoder;
+BITMAPINFOHEADER bh;
+
+decoder = Creators::CreateVideoDecoder (bh);
+      ],
+      AC_MSG_RESULT(succeeded)
+      HAVE_AVIFILE="yes",
+      AC_MSG_RESULT(failed)
+      HAVE_AVIFILE="no",
+    )
+    AC_LANG_RESTORE
+    CXXFLAGS="$ac_save_CXXFLAGS"
+    LDFLAGS="$ac_save_LDFLAGS"
+  fi
+])
+