Version:           2.1.5 (using KDE KDE 3.1.4)
Installed from:    Compiled From Sources
Compiler:          gcc 3.3.2 
OS:          Linux

Using gcc 3.3.2 I can not compile kdevelop 2.1.5 from sources. The bug has been reported to Gentoo bug database:
http://bugs.gentoo.org/show_bug.cgi?id=36545

The following patch should fix the problem:
--- kdevelop-2.1.5_for_KDE_3.1/kdevelop/doctreeview.cpp.orig	2003-12-29 16:26:45.000000000 +0100
+++ kdevelop-2.1.5_for_KDE_3.1/kdevelop/doctreeview.cpp	2003-12-29 16:27:00.000000000 +0100
@@ -826,7 +826,7 @@
     void changePathes();
     virtual void refresh();
     #if KDE_QTVER >= 3
-    void DocTreeKDELibsFolder::appendBooks(QDir dir);
+    void appendBooks(QDir dir);
     #endif
 };


Basically, in the class definition of DocTreeKDELibsFolder, one function is qualified with the class name. This is no good.
This change is required for building kdevelop 2.1.5 on the Gentoo amd64 platform.