--- pypoppler-0.12.1/acinclude.m4~	2009-09-26 20:31:23.000000000 +0200
+++ pypoppler-0.12.1/acinclude.m4	2010-07-18 11:15:40.554807025 +0200
@@ -43,12 +43,19 @@ AC_DEFUN([AM_CHECK_PYTHON_HEADERS],
 [AC_REQUIRE([AM_PATH_PYTHON])
 AC_MSG_CHECKING(for headers required to compile python extensions)
 dnl deduce PYTHON_INCLUDES
+if test "$cross_compiling" = yes; then
+  if test -z "$PYTHON_INCLUDES"; then
+    AC_MSG_ERROR(cross compiling: please set PYTHON_INCLUDES)
+  fi
+else
+dnl not indenting to minimize diff
 py_prefix=`$PYTHON -c "import sys; print sys.prefix"`
 py_exec_prefix=`$PYTHON -c "import sys; print sys.exec_prefix"`
 PYTHON_INCLUDES="-I${py_prefix}/include/python${PYTHON_VERSION}"
 if test "$py_prefix" != "$py_exec_prefix"; then
   PYTHON_INCLUDES="$PYTHON_INCLUDES -I${py_exec_prefix}/include/python${PYTHON_VERSION}"
 fi
+fi
 AC_SUBST(PYTHON_INCLUDES)
 dnl check if the headers exist:
 save_CPPFLAGS="$CPPFLAGS"