Added checks for doxygen and STL.

README.alpha updated for latest changes.

m4/various.m4

@@ -28,3 +28,25 @@ AC_DEFUN([EDE_DEVELOPMENT], [
 		DEBUGFLAGS="$DEBUGFLAGS -pedantic"
 	fi
 ])
+
+dnl Some distributions split packages between STL runtime
+dnl and development versions; this will ensure we have development packages
+dnl Code is based on AC_CXX_HAVE_STL from Todd Veldhuizen and Luc Maisonobe
+AC_DEFUN([EDE_CHECK_STL], [
+	AC_MSG_CHECKING(for reasonable STL support)
+	AC_LANG_CPLUSPLUS
+	AC_TRY_COMPILE([
+		#include <list>
+		#include <deque>
+		using namespace std;
+	],[
+		list<int> x; x.push_back(5);
+		list<int>::iterator iter = x.begin(); if (iter != x.end()) ++iter; return 0;
+	], ac_cv_cxx_have_stl=yes, ac_cv_cxx_have_stl=no)
+
+	if eval "test $ac_cv_cxx_have_stl = no"; then
+		AC_MSG_ERROR(You don't have STL (C++ standard library) packages installed, or your version of compiler is too old. Please fix this first)
+	else
+		AC_MSG_RESULT(yes)
+	fi
+])