Thank you for the response. I looked in src/Gtk/Makefile and indeed the LDFLAGS did not specify -rdynamic. I just added it and that solved the issue.
-Russ On Fri, 26 Feb 2021 at 07:03, Dr. Jürgen Sauermann <mail@jürgen-sauermann.de> wrote: > Hi Russtopia, > > i have noticed in the past that -rdynamic is somewhat platform > specific - some understand it, some complain. > > Some background to GTK: > > GTK dynamically links event handlers like those declared in the files > produced by glade. That is in glade (or some other GUI definition file) > you specify the name of a handler as a text string and the binary program > (Gtk_server) that implements the GUI tries to find a (dynamically linked) > function with that name. > > This mechanism requires that the function name of the handler is being > exported. > > Exporting the function name is what -rdynamic does. According to > *man gcc*: > > * -rdynamic* > * Pass the flag -export-dynamic to the ELF linker, on targets > that* > * support it. This instructs the linker to add all symbols, not > only* > * used ones, to the dynamic symbol table. This option is needed > for* > * some uses of "dlopen" or to allow obtaining backtraces from > within* > * a program.* > > Normally ./configure does this automatically (and correctly) by some magic > that is beyond what the GNU APL ./configure script can control. > > If it doesn't (you can check that if you look at the gcc/ld commands when > GNU APL > is built) then you can explicitly add extra flags needed in the > compilation (of Gtk_server) > like this: > > *CXXFLAGS="your-compiler-flags..." ./configure** <your configure > options...>* > > or (for linker flags): > > *LDFLAGS="your-linker-flags..." ./configure <your configure options...>* > > One of these flags should hopefully do it if you provide the flag needed > by your platform. > > You should also check with *ldd Gtk_server* that it has found all the > libraries that it needs. > > Best Regards, > Jürgen > > > > On 2/25/21 10:05 PM, Russtopia wrote: > > I was trying out the GNU APL ⎕GTK Cookbook tutorial and ran into this, > which appears to cause the button's 'clicked' handler not to function > (hanging the UI and APL itself until I kill the Gtk_server and/or the APL > script from another shell). > > I looked through the configure script and see some platforms define > "export_dynamic_flag_spec=-rdynamic" but I'm not sure if or how to ensure > this is defined in my build. Am I doing something dumb? I'm reasonably sure > I have the button element named properly and defined the 'clicked' signal > in the Glade editor. > > Linux x86_64 > Devuan Linux (Debian 8.3.0-6) > gtk+3.0_3.24.5-1 > > --- > $ ./my-application.apl > Loading GUI: /home/russtopia/GNUAPL/workspaces/my-application.glade > Top-level widget: window1 > See class='GtkWindow' and id='window1' > See class='GtkGrid' and id='grid1' > See class='GtkLabel' and id='label1' > property name='lblEmployee > End of object class=GtkLabel id=label1 widget-name=lblEmployee > > See class='GtkLabel' and id='label2' > property name='lblPosition > End of object class=GtkLabel id=label2 widget-name=lblPosition > > See class='GtkEntry' and id='entry1' > property name='entryEmployee > End of object class=GtkEntry id=entry1 widget-name=entryEmployee > > See class='GtkEntry' and id='entry2' > property name='entryPosition > End of object class=GtkEntry id=entry2 widget-name=entryPosition > > See class='GtkButton' and id='btnOK' > property name='OK-button > End of object class=GtkButton id=btnOK widget-name=OK-button > > End of object class=GtkGrid id=grid1 widget-name= > > End of object class=GtkWindow id=window1 widget-name= > > map glade id= 'window1' to GObject 0x55da20cb82a0 > map glade id= 'grid1' to GObject 0x55da20d43140 > map glade id= 'btnOK' to GObject 0x55da20f29180 > map glade id= 'entry2' to GObject 0x55da20d948f0 > map glade id= 'entry1' to GObject 0x55da20d94640 > map glade id= 'label2' to GObject 0x55da20c48590 > map glade id= 'label1' to GObject 0x55da20c483f0 > > (Gtk_server:16920): Gtk-WARNING **: 12:22:32.829: Could not find signal > handler 'clicked'. Did you compile with -rdynamic? > GUI signals connected. > Loading CSS: /home/russtopia/GNUAPL/workspaces/my-application.css > 1 > [I hit CTRL-C twice here] > 0 > ATTENTION > ⎕GTK Blocking > ^ > [script is still hung until I kill it from another shell] > --- > > >
