Remove obsolete build option 'FLTK_OPTION_STD'

This option is no longer needed since FLTK 1.5 always requires C++11.

FL/Fl_Table.H

@@ -22,17 +22,7 @@
 #include <FL/Fl_Group.H>
 #include <FL/Fl_Scroll.H>
 
-// EXPERIMENTAL
-// We use either std::vector or the private class Fl_Int_Vector
-// depending on the build option FLTK_OPTION_STD or --enable-use_std.
-// This option allows to use std::string and std::vector in FLTK 1.4.x
-
-#if (FLTK_USE_STD)
 #include <vector>
-typedef std::vector<int> Fl_Int_Vector;
-#else
-class Fl_Int_Vector; // private class declared in src/Fl_Int_Vector.H
-#endif
 
 /**
   A table of widgets or other content.
@@ -167,8 +157,8 @@ private:
   };
   unsigned int flags_;
 
-  Fl_Int_Vector *_colwidths;            // column widths in pixels
-  Fl_Int_Vector *_rowheights;           // row heights in pixels
+  std::vector<int> *_colwidths;         // column widths in pixels
+  std::vector<int> *_rowheights;        // row heights in pixels
 
   // number of columns and rows == size of corresponding vectors
   int col_size();                       // size of the column widths vector

FL/fl_ask.H

@@ -1,7 +1,7 @@
 //
 // Standard dialog header file for the Fast Light Tool Kit (FLTK).
 //
-// Copyright 1998-2022 by Bill Spitzak and others.
+// Copyright 1998-2025 by Bill Spitzak and others.
 //
 // This library is free software. Distribution and use rights are outlined in
 // the file "COPYING" which should have been included with this file.  If this
@@ -24,9 +24,7 @@
 #include <FL/Enumerations.H>
 #include <FL/fl_attr.h>
 
-#if (FLTK_USE_STD)
 #include <string>
-#endif
 
 class Fl_Widget;
 
@@ -76,13 +74,12 @@ FL_EXPORT const char *fl_input(int maxchar, const char *label, const char *deflt
 FL_EXPORT const char *fl_password(int maxchar, const char *label, const char *deflt = 0, ...)
     __fl_attr((__format__(__printf__, 2, 4)));
 
-// since FLTK 1.4.0 -- only with option FLTK_USE_STD
+// since FLTK 1.4.0 -- optional
+// since FLTK 1.5.0 -- always
 
 // - fl_input_str()    with limited input size, returns std::string
 // - fl_password_str() with limited input size, returns std::string
 
-#if (FLTK_USE_STD)
-
 FL_EXPORT std::string fl_input_str(int maxchar, const char *label, const char *deflt = 0, ...)
     __fl_attr((__format__(__printf__, 2, 4)));
 
@@ -95,8 +92,6 @@ FL_EXPORT std::string fl_password_str(int maxchar, const char *label, const char
 FL_EXPORT std::string fl_password_str(int &ret, int maxchar, const char *label, const char *deflt = 0, ...)
     __fl_attr((__format__(__printf__, 3, 5)));
 
-#endif
-
 FL_EXPORT Fl_Widget *fl_message_icon();
 extern FL_EXPORT Fl_Font fl_message_font_;
 extern FL_EXPORT Fl_Fontsize fl_message_size_;