XCore Exchange

Posted: **Tue Sep 19, 2017 10:05 am**

I have made a local copy of app_tiwisl_simple_webserver called _app_tiwisl_simple_webserver.

The system has compiled fine and works as expected I guess. I have discussed it in http://www.teigfam.net/oyvind/home/tech ... otes-wifi/

module_wifi_tiwisl has been modified, I have added wifi_led_server.h and wifi_led_server.xc (incomplete). I use git repositories.

xmake complains about .build/src/xhttpd.xc.pca.xml.decouple which I can't find (I see "invisible" files). It may not have been stored to disk.

Speculative: I don't know if this started when I originally had created wifi_led_server.h and wifi_led_server.xc in the build project _app_tiwisl_simple_webserver and then later on dragged and dropped them down to module_wifi_tiwisl, which is the right place I guess. Then delete them in _app_tiwisl_simple_webserver. However, when I now tried to delete them in module_wifi_tiwisl and create them anew (with contents copied from copies) it didn't help.

I saw an include of wifi_tiwisl_server.h in wifi_tiwisl_spi.h that I removed, no help.

Is there some kind of relationship here that I don't see? The built and the used modules? Hmm..

Both 14.3.0 and 14.2.4 give the same error.

I'd certainly like a hint to learn how to get around this.

==== BUILD LOG (also attached) ====

Code: Select all

20:34:56 **** Build of configuration Default for project _app_tiwisl_simple_webserver ****
xmake all 
Checking build modules
Using build modules: module_spi_master module_wifi_tiwisl
Analyzing httpd.c
Analyzing hci_helper.c
Analyzing hci_pkg.c
Analyzing tiwisl_event_handler.c
Analyzing main.xc
Analyzing xhttpd.xc
In file included from ../src/xhttpd.xc:1:
../src/xhttpd.h:11:56: error: parse error before "i_wifi_led_server"
void xhttpd (chanend c_wifi, client wifi_led_server_if i_wifi_led_server);
                                                       ^
../src/xhttpd.xc:56:6: error: conflicting types for 'xhttpd'
void xhttpd (chanend c_wifi, client wifi_led_server_if i_wifi_led_server)
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../src/xhttpd.h:11:1: note: previous declaration of 'xhttpd' was here
void xhttpd (chanend c_wifi, client wifi_led_server_if i_wifi_led_server);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
xmake[1]: *** [.build/src/xhttpd.xc.pca.xml.decouple] Error 1
xmake: *** [analyze] Error 2
 
20:34:57 Build Finished (took 899ms)

Posted: **Tue Sep 19, 2017 12:40 pm**

Hi. Both declarations appear to be the same. Please comment out one of the declarations, save and recompile to test again. Guessing the issue is the double declarations.

Posted: **Tue Sep 19, 2017 2:37 pm**

Thanks. But there is only one declaration, in the header file xhttpd.h. It seems like the compiler sees it two times in different contexts, since it starts with

Code: Select all

../src/xhttpd.h:11:56: error: parse error before "i_wifi_led_server"
void xhttpd (chanend c_wifi, client wifi_led_server_if i_wifi_led_server);
                                                       ^

Then it tells that it has seen it before, and at that very line.

If I comment away the only declaration there is, in xhttpd.h I get this expected result:

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Compiling main.xc
../src/main.xc:41:19: error: unknown function identifier `xhttpd' (possibly missing prototype?)
      on tile[0]: xhttpd(c_wifi, i_wifi_led_server[1]); // The main webserver thread is here
                  ^
xmake[1]: *** [.build/src/main.xc.o] Error 1
xmake: *** [bin//_app_tiwisl_simple_webserver.xe] Error 2

But I'd certainly like any thread here!

Posted: **Tue Sep 19, 2017 3:16 pm**

I have a fix. I moved #include "xhttpd.h" between wifi_led_server.h and wifi_tiwisl_server.h

in main.xc

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#include "wifi_led_server.h" // Added by Teig
#include "xhttpd.h"
#include "wifi_tiwisl_server.h"

and in xhttpd.xc:

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#include "httpd.h"
#include "wifi_led_server.h" // Added by Teig
#include "xhttpd.h"
#include "wifi_tiwisl_server.h"

I was so confused by the rather strange accusation by the compiler that it had seen something defined before at the exact place where I knew it had seen something, that I thought it a compiler error.

I guess this isn't called compiler error in C/XC, since it certainly stops me. Great.

But I still think a less confusing error message could have been given, or isn't that possible or even wanted?

XCore Exchange

"Parse error" causing "conflicting types" with "previous declaration" back to line of parse error

"Parse error" causing "conflicting types" with "previous declaration" back to line of parse error

Re: "Parse error" causing "conflicting types" with "previous declaration" back to line of parse error

Re: "Parse error" causing "conflicting types" with "previous declaration" back to line of parse error

Re: "Parse error" causing "conflicting types" with "previous declaration" back to line of parse error