simple X window program not compile, plz help
walter harms
wharms at bfs.de
Mon Nov 1 03:56:55 PDT 2010
Hi Eric,
you should take a look at the "Motif_Programming_Manual_6a".
make you self familar with the names like "toolkit","widget" etc, and try to understand
what that means. IMHO most problems occur because ppl do not understand what it actualy
means.
Do not forget to install all the required -dev packages. When you can not find a "*.h" file
normaly you are missing one.
BTW: Going with Xt has some advantages because they do not change every year, they do not
need a special browser, and most bugs are fixed since they are in use for years.
that is what some people (and companies) are looking for.
re,
wh
eric lin schrieb:
> dear Alan or any x window user/programers:
>
> it compile success by your last suggestion
> but when I run it,
> Segmentation fault (anyone can tell me why?)(that book's code actually is already illegal on my system's x window grammer, plus
> I have hard time to figure it out what that book's authors's explanation. But I won't abondon it in short time.)
> that book is really pretty unorganized, especially code in ununiform. But that is so far I can get most approach to X on linux, which is I borrow from Los Angeles's central city library at downtown. I also see another book, "Motif", in that library also doing graphic on Unix, written by c++. I search a little bit on google's motif part, i find a simple c code and I copy it and try to compile it on my system, but it not work
> -------------------------------
> root at eric-laptop:/home/eric# gcc try3.c -lXaw -lXt -lX11 -lXm
> try3.c:2:20: error: Xm/Xm.h: No such file or directory
> try3.c:3:22: error: Xm/PushB.h: No such file or directory
> try3.c:8: error: expected ‘)’ before ‘*’ token
> try3.c: In function ‘main’:
> try3.c:13: error: ‘Widget’ undeclared (first use in this function)
> try3.c:13: error: (Each undeclared identifier is reported only once
> try3.c:13: error: for each function it appears in.)
> try3.c:13: error: expected ‘;’ before ‘top_wid’
> try3.c:14: error: ‘XtAppContext’ undeclared (first use in this function)
> try3.c:14: error: expected ‘;’ before ‘app’
> try3.c:16: error: ‘top_wid’ undeclared (first use in this function)
> try3.c:16: error: ‘app’ undeclared (first use in this function)
> try3.c:16: error: ‘NULL’ undeclared (first use in this function)
> try3.c:19: error: ‘button’ undeclared (first use in this function)
> try3.c:25: error: ‘XmNactivateCallback’ undeclared (first use in this function)
> try3.c:25: error: ‘pushed_fn’ undeclared (first use in this function)
> try3.c: At top level:
> try3.c:32: error: expected ‘)’ before ‘w’
> root at eric-laptop:/home/eric# cat try3.c
>
> #include <Xm/Xm.h>
> #include <Xm/PushB.h>
>
> /* Prototype Callback function */
>
> void pushed_fn(Widget , XtPointer ,
> XmPushButtonCallbackStruct *);
>
>
> main(int argc, char **argv)
>
> { Widget top_wid, button;
> XtAppContext app;
>
> top_wid = XtVaAppInitialize(&app, "Push", NULL, 0,
> &argc, argv, NULL, NULL);
>
> button = XmCreatePushButton(top_wid, "Push_me", NULL, 0);
>
> /* tell Xt to manage button */
> XtManageChild(button);
>
> /* attach fn to widget */
> XtAddCallback(button, XmNactivateCallback, pushed_fn, NULL);
>
> XtRealizeWidget(top_wid); /* display widget hierarchy */
> XtAppMainLoop(app); /* enter processing loop */
>
> }
>
> void pushed_fn(Widget w, XtPointer client_data,
> XmPushButtonCallbackStruct *cbs)
> {
> printf("Don't Push Me!!\n");
> }
>
> ---------------------------------------------
> so if anyone know how to make it compile, I will be highly appreciate and I am glad to borrow that Motif book from my citi library again.
> plz help
> and
> thx your time and effort and patience, Eric, fsshl at luxmail.com
> ----------------------------------------------------------------
> ///////////////////////////////////////////////////////////////////
> -----------------
>
> --- alan.coopersmith at oracle.com wrote:
>
> From: Alan Coopersmith <alan.coopersmith at oracle.com>
> To: fsshl at luxmail.com
> CC: xorg at lists.freedesktop.org
> Subject: Re: simple X window program not compile, plz help
> Date: Sun, 31 Oct 2010 20:24:36 -0700
>
> eric lin wrote:
>> Dear X window advanced programers:
>>
>> on my ubuntu/linux, I tried a simple x window program by c
>> as following:
>>
>> ---------------------------------------
>>
>> #include <stdlib.h>
>> #include <stdio.h>
>> #include <X11/Intrinsic.h> /* for creation routines */
>> #include <X11/StringDefs.h> /* for resource names */
>> #include <X11/Xaw/Form.h> /* to define the formWidgetClass */
>>
>> int main()
>> {
>> XtAppContext appContext;
>> Widget toplevel, form;
>>
>> toplevel = XtVaAppInitialize( &appContext,
>> "2D-Editor", /* Application class name */
>> NULL, 0, /* option list (not used)
>> &argc, argv, /* command line parameters */
>> NULL, /* fallback resources (not
>> used) */
>> NULL /* end of the variable
>> argument list */
>> , 0);
>>
>> if (toplevel == NULL) {
>> fprintf(stderr, "Failed to connect to X server!" );
>> exit(1);
>> }
>> return (0);
>> }
>>
>> ---------------------------------------------------------------
>> this is I copy from page 146 and page 150 of book "X Window Programming from SCRATCH"
>>
>> ----------------
>> eric at eric-laptop:~$ gcc try2.c
>> try2.c: In function ‘main’:
>> try2.c:20: warning: not enough variable arguments to fit a sentinel
>> /tmp/cc06w66r.o: In function `main':
>> try2.c:(.text+0x41): undefined reference to `XtVaAppInitialize'
>> collect2: ld returned 1 exit status
>
> You need to tell it what libraries to link with - the automated way would be
> gcc try2.c `pkg-config --libs xt`
>
> The manual way would be
> gcc try2.c -lXt -lX11
>
> When you start calling Xaw functions, you'd add it:
> gcc try2.c `pkg-config --libs xt xaw7`
> or
> gcc try2.c -lXaw -lXt -lX11
>
> But really, if you want to learn to write apps that people will use, you should
> be learning GTK or Qt, not the ancient and mostly unmaintained Xaw.
>
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