Pike-devel

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3045 discussions

pike version when cross compiling
by H. William Welliver III 02 Feb '18

02 Feb '18

I also noticed that the script run during make install assumes that the version of the pike executable running the installer is the version being installed. Perhaps it should actually look at the version it's installing? For instance, when cross compiling the version could theoretically be different and you'd get confusing results.

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strange error on cross-compiled pike 8
by H. William Welliver III 02 Feb '18

02 Feb '18

I cross compiled pike 8.0.498 on an amd64/linux system for use on an armv5tejl/linux system, and I’m getting a strange error when starting it up: -:1: Type mismatch for callback function `[]=: -:1: Expected: scope(0,function(zero, (0=zero) : 0)). -:1: Got : function(int(128..-129), int(128..-129) : int(0..-16777216)). -:1: Program constant "Buffer" is NULL. program.c:6011: Fatal error: Failed to initialize class '_Stdio' No stack - no backtrace. Aborted At first I thought it might be a dynamic loading problem, but _Stdio shouldn’t be a dynamic module, right? Anything obvious I might be missing?

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strlen
by ceder (-) Per Cederqvist ＠ Pike (-) developers forum 02 Feb '18

02 Feb '18

https://pike.lysator.liu.se/generated/manual/modref/ex/predef_3A_3A/strlen.… says that strlen is deprecated and that we are supposed to use sizeof instead. At the same time, I see new Pike code beeing committed that use strlen (282a8a93 by Grubba 2018-01-04, a5c5c7cd by Bill 2017-12-22, be932f508271a by Arne 2017-10-31, 26da463c by Martin 2017-02-21, ff2876e2cb by Grubba 2017-01-30) (in some cases this is just an strlen that is moved, but still). To be fair, there is also some new code that uses sizeof(string). I get why strlen(multiset|array|mapping|object thing) is deprecated, but peronally I'd like to keep strlen(string) as a supported function. I think it sometimes produces more readable code.

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gcc-7 fails to compile Pike
by Stephen R. van den Berg 01 Feb '18

01 Feb '18

In pikefarm, the devel2 host has gcc-6 and gcc-7 (Debian 7.2.0-19); by default it picks gcc-7 and then fails. Manually compiling with gcc-6 works, I think I already tried gcc-7 using -O1, and that also works. Still trying to investigate why exactly. The only visible odd warning during compilation is this one: Compiling backend.c In file included from /var/src/roxen/81pike/src/array.h:10:0, from /var/src/roxen/81pike/src/callback.h:10, from /var/src/roxen/81pike/src/backend.h:11, from /var/src/roxen/81pike/src/backend.cmod:13: /var/src/roxen/81pike/src/backend.cmod: In function ‘f_Backend_get_stats’: /var/src/roxen/81pike/src/svalue.h:753:13: warning: iteration 9223372036854775807 invokes undefined behavior [-Waggressive-loop-optimizations] while(num_--) \ ~~~~^ /var/src/roxen/81pike/src/interpret.h:265:6: note: in expansion of macro ‘free_mixed_svalues’ free_mixed_svalues(_sp_, x_); \ ^~~~~~~~~~~~~~~~~~ /var/src/roxen/81pike/src/interpret.h:279:7: note: in expansion of macro ‘pop_n_elems’ pop_n_elems (x2_ - 1); \ ^~~~~~~~~~~ /var/src/roxen/81pike/src/interpret.h:283:39: note: in expansion of macro ‘stack_unlink’ #define stack_pop_n_elems_keep_top(X) stack_unlink(X) ^~~~~~~~~~~~ /var/src/roxen/81pike/src/backend.cmod:947:1: note: in expansion of macro ‘stack_pop_n_elems_keep_top’ stack_pop_n_elems_keep_top(args); ^ ~~~~~~~~~~~~~~~~~~~~~~ /var/src/roxen/81pike/src/svalue.h:753:8: note: within this loop while(num_--) \ ^ /var/src/roxen/81pike/src/interpret.h:265:6: note: in expansion of macro ‘free_mixed_svalues’ free_mixed_svalues(_sp_, x_); \ ^~~~~~~~~~~~~~~~~~ /var/src/roxen/81pike/src/interpret.h:279:7: note: in expansion of macro ‘pop_n_elems’ pop_n_elems (x2_ - 1); \ ^~~~~~~~~~~ /var/src/roxen/81pike/src/interpret.h:283:39: note: in expansion of macro ‘stack_unlink’ #define stack_pop_n_elems_keep_top(X) stack_unlink(X) ^~~~~~~~~~~~ /var/src/roxen/81pike/src/backend.cmod:947:1: note: in expansion of macro ‘stack_pop_n_elems_keep_top’ stack_pop_n_elems_keep_top(args); ^ ~~~~~~~~~~~~~~~~~~~~~~ -- Stephen.

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call_out vs Function.curry
by ceder (-) Per Cederqvist ＠ Pike (-) developers forum 01 Feb '18

01 Feb '18

I was made aware of a feature of call_out that I didn't know about: if the object that the callback function belongs to is destructed before the call_out is supposed to be executed, the call_out is silently ignored. But with Function.curry, this is not the case. Instead you get an error message. Here is a demo program: ---cut here--- #!/usr/bin/env pike class X { void work(int x) { werror("got work %d\n", x); } } int main(int argc, array(string) argv) { X x = X(); call_out(x->work, 1, 1); if (argc > 1) call_out(destruct, 2, x); call_out(x->work, 3, 3); call_out(Function.curry(x->work)(4), 4); call_out(exit, 5, 0); return -1; } ---cut here--- Run it with no arguments to see what happens when the object isn't destroyed: $ ./test.pike got work 1 got work 3 got work 4 Run it with any argument to trigger the destruction of x. Notise how you don't get any error for the 3-second callback, but the 4-second currified callback gives an error: $ ./test.pike 1 got work 1 Cannot call functions in destructed objects. Unknown program: destructed object->function(4) server/pike/8.0.469/lib/modules/Function.pmod:85: Function.__lambda_65958_5_line_85() -:1: Pike.Backend(0)->`()(3600.0) Would it make sense to have Function.curry also ignore calls to destructed objects? The change is trivial: > diff --git a/lib/modules/Function.pmod b/lib/modules/Function.pmod > index 8a5498c483..d0b4a65335 100644 > --- a/lib/modules/Function.pmod > +++ b/lib/modules/Function.pmod > @@ -83,7 +83,7 @@ function(mixed...:function(mixed...:mixed|void)) curry(function f) > { > return lambda(mixed ... args1) { > return lambda(mixed ... args2) { > - return f(@args1, @args2); > + return f && f(@args1, @args2); > }; > }; > } In either case, I think this ought to be documented here: http://pike.lysator.liu.se/generated/manual/modref/ex/predef_3A_3A/Pike/__B…

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MPI
by Martin Nilsson (Coppermist) ＠ Pike (-) developers forum 01 Feb '18

01 Feb '18

I keep getting this issue when rerunning configure. if test -f linker_options ; then touch linker_options ; else :; fi Updating modules/modlist.h cat: MPI/modlist_segment: No such file or directory Makefile:129: recipe for target 'modlist.h' failed make[4]: *** [modlist.h] Error 1 Makefile:1118: recipe for target 'static_module_objects' failed make[3]: *** [static_module_objects] Error 2 Makefile:1156: recipe for target 'module_objects' failed make[2]: *** [module_objects] Error 2 Makefile:149: recipe for target '_make_in_builddir' failed make[1]: *** [_make_in_builddir] Error 2 Makefile:66: recipe for target 'compile' failed make: *** [compile] Error 2

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Newlines in strings
by Stephen R. van den Berg 29 Jan '18

29 Jan '18

When writing some new SQL queries, I was wondering, would there be a downside to allowing direct newlines in strings? I.e. sample code: mixed r = db->big_typed_query(" SELECT invno FROM mutation mu WHERE mu.mutid = 12 "); would then just work. And if that is not desirable, any other suggestions which do not involve ugliness like: mixed r = db->big_typed_query("" "SELECT invno " " FROM mutation mu " " WHERE mu.mutid = 12 " ""); or mixed r = db->big_typed_query(" \ SELECT invno \ FROM mutation mu \ WHERE mu.mutid = 12 \ "); -- Stephen.

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GTK2 setting locale
by Arne Goedeke 29 Jan '18

29 Jan '18

The GTK2 module sets the locale of the process to "". This breaks on locales which e.g. use COMMA instead of PERIOD for floating point numbers. The symptom I have observed is that pike will run into a loop inside of the compiler when trying to parse a float and then eventually crash. I think the short-term fix should be to call gtk_disable_setlocale() inside of the GTK2 module to prevent GTK2 to change the locale. Maybe mid-term we can make pike not depend on the process locale? I suppose there might be other external modules which might mess with locale. Arne P.S. I won't be able to attend the pike meetup unfortunately...

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How to resize the button in this GUI to be smaller ?
by Hans Schueren 28 Jan '18

28 Jan '18

Hi again, i have a gui code here. The button is half size of the main window and to great. Any idea how to make it smaller ? _____________________________________________________ GTK2.Widget mainwindow,clickcnt,clicker; int clicks; void click() { clickcnt->set_text("Clicks: "+(++clicks)); } int main() { GTK2.setup_gtk(); mainwindow=GTK2.Window(GTK2.WindowToplevel); mainwindow->set_title("Click counter"); mainwindow->set_size_request(600, 500); mainwindow->set_position(GTK2.WIN_POS_CENTER); mainwindow->add(GTK2.Vbox(0,10) ->add(clickcnt=GTK2.Label("There have been no clicks yet")) ->add(clicker=GTK2.Button("Click me")) )->show_all(); mainwindow->signal_connect("delete_event",lambda() {exit(0);}); clicker->signal_connect("clicked",click); return -1; } -- Sent from: http://pike.1058338.n5.nabble.com/Pike-Dev-f4605220.html

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Set a gtk2 window to center in pike 7.8
by Hans Schueren 27 Jan '18

27 Jan '18

//How to set the positon of window1 to center ?// window1->set_position(GTK2_WINDOW(window), GTK2_WIN_POS_CENTER_ALWAYS); //window1 is a toplevelWindow// object window1 = GTK2.Window(GTK2.WINDOW_TOPLEVEL); Let us assume not to be programmer. Instead a metalworker. I only want to cut out a metal sheet as main in the right size and center position! The main frame of the project. -- Sent from: http://pike.1058338.n5.nabble.com/Pike-Dev-f4605220.html

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