compiling C program containing Xutil functions [Unix Programming]

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From: happytoday on 12 Feb 2010 16:41

On Feb 9, 5:28 pm, Fred <fred.l.kleinschm...(a)boeing.com> wrote:
> On Feb 8, 3:10 pm, happytoday <ehabaziz2...(a)gmail.com> wrote:
>
>
>
> > On Feb 9, 12:30 am, toucan <tou...(a)zoo.invalid> wrote:
>
> > > happytoday wrote:
> > > > I failed to compile that program as written below with those error
> > > > messages :
> > > > The conditions of compiling this program are not available any longer
> > > > in the net so please help me compiling this program .
>
> > > > Error messages :
> > > > ------------------------
> > > > root @ Homer /export/home/unix.d/programs.d/clang.d/GUI>cc plot_data.c
> > > > "plot_data.c", line 15: warning: implicit function declaration:
> > > > create_int_dialog_entry
> > > > "plot_data.c", line 16: warning: implicit function declaration:
> > > > create_float_dialog_entry
> > > > "plot_data.c", line 20: warning: implicit function declaration:
> > > > set_up_dialog
> > > > "plot_data.c", line 24: warning: implicit function declaration:
> > > > read_dialog_window
> > > > Undefined first referenced
> > > > symbol in file
> > > > create_int_dialog_entry plot_data.o
> > > > create_float_dialog_entry plot_data.o
> > > > read_dialog_window plot_data.o
> > > > set_up_dialog plot_data..o
> > > > ld: fatal: Symbol referencing errors. No output written to a.out
>
> > > > Sources code :
> > > > ------------------------
> > > > #include </usr/openwin/share/include/X11/Xlib.h>
> > > > #include </usr/openwin/share/include/X11/Xutil.h>
>
> > > It would be better to write
> > > #include <X11/Xlib.h>
> > > #include <X11/Xutil.h>
>
> > > then, probably something like the following, assuming your
> > > lib files are in /usr/openwin/lib (e.g. libXlib.a if it's
> > > the correct name for your library)
> > > cc -I/usr/openwin/share/include -L/usr/openwin/lib -lXlib -lXutil
>
> > > > #include <stdio.h>
> > > > #include <math.h>
>
> > > > int main()
> > > > {
> > > > /* Define default values: */
>
> > > > int n = 0;
> > > > float x = 0.0;
>
> > > > /* Define contents of dialog window */
>
> > > > create_int_dialog_entry("n", &n);
> > > > create_float_dialog_entry("x", &x);
>
> > > > /* Create window with name "Setup" and top-left corner at (0,0) */
>
> > > > set_up_dialog("Setup", 0, 0);
>
> > > > /* Display the window and read the results */
>
> > > > read_dialog_window();
>
> > > > /* Print out the new values */
>
> > > > printf("n = %d, x = %f\n", n, x);
> > > > return 0;
> > > > }
>
> > The problem that I do not know what library files should be included
> > to resolve these functions
> > so I compiled with the below errors :
>
> > root @ Homer /clang>head plot_data.c
> > #include <X11/Xlib.h>
> > #include <X11/Xutil.h>
> > #include <stdio.h>
> > #include <math.h>
>
> > int main()
> > {
> > /* Define default values: */
>
> > int n = 0;
> > root @ Homer /clang>
>
> > root @ Homer /clang>cc -I/usr/openwin/share/include -L/usr/openwin/lib
> > -lXlib -lXutil plot_data.c
>
> Are you sure you want "-I/usr/openwin/share/include" instead of
> "-L/usr/openwin/share/include" ?
>
> Where are libX11.aand libXutil.a on your system?
>
> In my experience, Sun Unix platforms put them in "/usr/openwin",
> while most other -nix platforms put them (or at least links to them)
> in /usr/lib or /usr/X11R6.
>
> You need to find where thosw libraries are on your system, and
> set the "-L" options appropriately to point to them.
>
> > "plot_data.c", line 15: warning: implicit function declaration:
> > create_int_dialog_entry
>
> Line 15 of your source code apparently references a function
> named "create_int_directory_entry" without you having provided
> a prototype for that function.
>
> > "plot_data.c", line 16: warning: implicit function declaration:
> > create_float_dialog_entry
> > "plot_data.c", line 20: warning: implicit function declaration:
> > set_up_dialog
> > "plot_data.c", line 24: warning: implicit function declaration:
> > read_dialog_window
>
> Ditto for these warnings.
>
> > ld: fatal: library -lXlib: not found
> > ld: fatal: library -lXutil: not found
>
> libXlib.a and libXutil.a could not be found in the paths you provided.
>
> > ld: fatal: File processing errors. No output written to a.out- Hide quoted text -
>
> > - Show quoted text -
>
> --
> Fred K

Please visit this page and see what the examples written about
Graphical Interfaces: Dialog Boxes example :
http://docs.huihoo.com/gnu/c-basics/c_tutorial.html

From: happytoday on 12 Feb 2010 16:41

From: Flash Gordon on 16 Feb 2010 18:57

happytoday wrote:

<snip>

> Please visit this page and see what the examples written about
> Graphical Interfaces: Dialog Boxes example :
> http://docs.huihoo.com/gnu/c-basics/c_tutorial.html

Or better yet, don't use that tutorial. Apart from using "void main" it
lists strncpy as one of the most useful string functions (it's use is
highly specialised), it keeps having a space after the < of #include
directives, it keeps saying statement blocks are required where you can
alternatively use a single statement (although sometimes it does not
bother with the block it says you need when initially describing the
construct)...

That's what a cursory skim through shows.
--
Flash Gordon

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