Compiling Fl.cxx...
In file included from ../FL/Fl_Text_Display.H:30,
                 from ../FL/Fl_Text_Editor.H:26,
                 from Fl_Screen_Driver.H:28,
                 from Fl.cxx:23:
../FL/Fl_Text_Buffer.H:170: error: parse error before `{' token
../FL/Fl_Text_Buffer.H:173: error: semicolon missing after declaration of `
   Fl_Text_Selection'
../FL/Fl_Text_Buffer.H: In member function `int Fl_Text_Selection::start().
   const':
../FL/Fl_Text_Buffer.H:122: error: `mSelected' undeclared (first use this.
   function)
../FL/Fl_Text_Buffer.H:122: error: (Each undeclared identifier is reported only.
   once for each function it appears in.)
../FL/Fl_Text_Buffer.H:122: error: `mStart' undeclared (first use this.
   function)
../FL/Fl_Text_Buffer.H: In member function `int Fl_Text_Selection::end() const
   ':
../FL/Fl_Text_Buffer.H:135: error: `mEnd' undeclared (first use this function)
../FL/Fl_Text_Buffer.H: At global scope:
../FL/Fl_Text_Buffer.H:173: error: parse error before `:' token
../FL/Fl_Text_Buffer.H:176: error: `int mEnd' used prior to declaration
../FL/Fl_Text_Buffer.H:177: error: `bool mSelected' used prior to declaration
../FL/Fl_Text_Buffer.H:178: error: parse error before `}' token
gmake[1]: *** [Fl.o] Error 1
gmake: *** [all] Error 1

--- fl_attr.h.orig	2024-03-25 11:58:09.415052446 +0100
+++ fl_attr.h	2024-03-25 11:58:09.413456991 +0100
@@ -168,11 +168,11 @@
 #endif
 #endif /* gcc 4.5.0 */
 
-#if FL_GCC_VERSION > 30100 /* gcc 3.1.0 */
+#if FL_GCC_VERSION >= 30400 /* gcc 3.4.0 */
 #ifndef FL_DEPRECATED
 #define FL_DEPRECATED(msg, func) func __attribute__((deprecated))
 #endif
-#endif /* gcc 3.1.0 */
+#endif /* gcc 3.4.0 */
 
 #endif /* __GNUC__ */