* Added configure options that allow building universal binaries.

git-svn-id: svn://rakshasa.no/libtorrent/trunk/rtorrent@889 e378c898-3ddf-0310-93e7-cc216c733640

scripts/common.m4

@@ -48,6 +48,52 @@ AC_DEFUN([TORRENT_ENABLE_EXTRA_DEBUG], [
 ])
 
 
+AC_DEFUN([TORRENT_WITH_SYSROOT], [
+  AC_ARG_WITH(sysroot,
+    [  --with-sysroot=PATH     compile and link with a specific sysroot.],
+    [
+      AC_MSG_CHECKING(for sysroot)
+
+      if test "$withval" = "no"; then
+        AC_MSG_RESULT(no)
+
+      elif test "$withval" = "yes"; then
+        AC_MSG_RESULT(not a path)
+        AC_MSG_ERROR(The sysroot option must point to a directory, like f.ex "/Developer/SDKs/MacOSX10.4u.sdk".)
+      else
+        AC_MSG_RESULT($withval)
+        
+        CXXFLAGS="$CXXFLAGS -isysroot $withval"
+        LDFLAGS="$LDFLAGS -Wl,-syslibroot,$withval"
+      fi
+    ])
+])
+
+
+AC_DEFUN([TORRENT_ENABLE_ARCH], [
+  AC_ARG_ENABLE(arch,
+    [  --enable-arch=ARCH        comma seprated list of architectures to compile for.],
+    [
+      AC_MSG_CHECKING(for target architectures)
+
+      if test "$enableval" = "yes"; then
+        AC_MSG_ERROR(no arch supplied)
+
+      elif test "$enableval" = "no"; then
+        AC_MSG_RESULT(using default)
+
+      else
+        AC_MSG_RESULT($enableval)
+
+        for i in `IFS=,; echo $enableval`; do
+          CXXFLAGS="$CXXFLAGS -arch $i"
+          LDFLAGS="$LDFLAGS -arch $i"
+        done
+      fi
+    ])
+])
+
+
 AC_DEFUN([TORRENT_OTFD], [
   AC_LANG_PUSH(C++)
   AC_MSG_CHECKING(for proper overloaded template function disambiguation)