Hi Graeme, I had another go on the Mac.
the use of the unit users is still an issue. it should be ok to simply ifndef darwin the lines in fpg_x11.pas Secondly, I did some more debugging regarding the X11 error. It depends on whether the window of the application is the actual toplevel X11 window or not. If there is a top level window, all is fine, if not I found that line 831 in file corelib/x11/fpg_netlayer_x11.pas causes the X11 error. The line with the offending procedure call is this: XGetWMProtocols(FDisplay, AWindow, @Protocols, @Count); Unfortunately, this does not tell me much, since my knwledge of X11 is very limited. maybe something more is needed to open a top level window, mac specific or not. This is the log from the corresponding gdb session: (gdb) c Continuing. Breakpoint 20, WINDOWADDPROTOCOL (this=0x520020, AWINDOW=6291457, APROTOCOL=0) at corelib/x11/fpg_netlayer_x11.pas:831 831 XGetWMProtocols(FDisplay, AWindow, @Protocols, @Count); 4: COUNT = 0 3: PROTOCOLS = 0x0 2: AWINDOW = 6291457 1: this->FDISPLAY = 0x803a00 (gdb) backtrace #0 WINDOWADDPROTOCOL (this=0x520020, AWINDOW=6291457, APROTOCOL=0) at corelib/x11/fpg_netlayer_x11.pas:831 #1 0x00051fea in WINDOWSETSUPPORTPING (this=0x520020, AWINDOW=6291457) at corelib/x11/fpg_netlayer_x11.pas:602 #2 0x0004dc92 in DOALLOCATEWINDOWHANDLE (this=0x1c0d1e0, APARENT=0x0) at corelib/x11/fpg_x11.pas:1424 #3 0x00045350 in ALLOCATEWINDOWHANDLE (this=0x1c0d1e0) at corelib/fpg_base.pas:1021 #4 0x00054546 in HANDLESHOW (this=0x1c0d1e0) at corelib/fpg_widget.pas:707 #5 0x00057df4 in HANDLESHOW (this=0x1c0d1e0) at gui/fpg_form.pas:347 #6 0x00057acf in SHOW (this=0x1c0d1e0) at gui/fpg_form.pas:288 #7 0x000111d0 in MAINPROC () at colorlistboxtest.lpr:19 #8 0x00011210 in PASCALMAIN () at colorlistboxtest.lpr:27 #9 0x00020e95 in SYSTEM_FPC_SYSTEMMAIN$LONGINT$PPCHAR$PPCHAR () #10 0x00011159 in _start () #11 0x00011088 in start () (gdb) step X Error of failed request: BadAtom (invalid Atom parameter) Major opcode of failed request: 18 (X_ChangeProperty) Atom id in failed request: 0x0 Serial number of failed request: 103 Current serial number in output stream: 104 _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
