Cross Win32->x86_64-linux works but Win64->x86_64-linux  don't
lazarus / 1-Linux

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marius.maximus · 2014-08-28 20:49

I use fpcup to build Lazarus+FPC for windows32 and for windows 64 bit

I have identical x86_64-linux binutils and indentical libs (from
debian Jessie 64 bit)

My fpcup settings settings.ini
Quote[windows32]
fpcdir=d:\developmentX32\fpc
fpcurl=http://svn.freepascal.org/svn/fpc/trunk
lazdir=d:\developmentX32\lazarus
lazurl=http://svn.freepascal.org/svn/lazarus/trunk/
primary-config-path=d:\developmentX32\configlazarus
binutilsdir=d:\developmentX32\fpcbootstrap
fpcbootstrapdir=d:\developmentX32\fpcbootstrap
noconfirm=true
keeplocalchanges=true
only=FPC,lazarus,lazbuild

[windows32_linux_x86_64]
fpcopt="-g -gl -O1"
lazopt="-g -gl -O1" 
fpcdir=d:\developmentX32\fpc
fpcurl=http://svn.freepascal.org/svn/fpc/trunk
binutilsdir=d:\developmentX32\fpcbootstrap
fpcbootstrapdir=d:\developmentX32\fpcbootstrap
cputarget=x86_64
ostarget=linux
verbose=1
only=FPCCleanOnly,FPCBuildOnly


[windows64]
fpcdir=d:\developmentX64\fpc
fpcurl=http://svn.freepascal.org/svn/fpc/trunk
lazdir=d:\developmentX64\lazarus
lazurl=http://svn.freepascal.org/svn/lazarus/trunk/
primary-config-path=d:\developmentX64\configlazarus
binutilsdir=d:\developmentX64\fpcbootstrap
fpcbootstrapdir=d:\developmentX64\fpcbootstrap
noconfirm=true
keeplocalchanges=true
only=FPC,lazarus,lazbuild

[windows64_linux_x86_64]
fpcopt="-g -gl -O1"
lazopt="-g -gl -O1" 
fpcdir=d:\developmentX64\fpc
fpcurl=http://svn.freepascal.org/svn/fpc/trunk
binutilsdir=d:\developmentX64\fpcbootstrap
fpcbootstrapdir=d:\developmentX64\fpcbootstrap
cputarget=x86_64
ostarget=linux
verbose=1
only=FPCCleanOnly,FPCBuildOnly
I created new application and compile it on win32 and win64 cross to
linux_x86_64

In both lazarus version cross compilation works OK  to linux_x86_64 .


But only from 32bits (win32) lazarus application works OK,

When I try run application created from (win64) lazarus
I see on linux console:

Quotex@debian:~$ ./project2
[FORMS.PP] ExceptionOccurred
  Sender=EInvalidOp
  Exception=Invalid floating point operation
  Stack trace:
  $00000000005A1EF1 line 1043 of gtk2/gtk2widgetset.inc
  $00000000004550F4 line 444 of include/application.inc
  $000000000041E1A1 line 17 of project2.lpr
TApplication.HandleException Invalid floating point operation
  Stack trace:
  $00000000005A1EF1 line 1043 of gtk2/gtk2widgetset.inc
  $00000000004550F4 line 444 of include/application.inc
  $000000000041E1A1 line 17 of project2.lpr
Exception at 00000000005A1EF1: EInvalidOp:
Invalid floating point operation.
  
ldd return identical result for both files
readelf return identical result for both files
size is identical

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marius.maximus · 2014-08-29 22:24

In my opinion
32bit Lazarus and 64bit Lazarus should generate identical application
But 64bit  is different  

I found solution:

Add
 SetExceptionMask(GetExceptionMask+ [exInvalidOp]);
Before
Application.Initialize;   


Without this "fix" I have exception in function
Code: [Select]procedure TGtk2WidgetSet.AppInit(var ScreenInfo:
TScreenInfo);
begin
  InitKeyboardTables;
  { Compute pixels per inch variable }
  ScreenInfo.PixelsPerInchX :=
    RoundToInt(gdk_screen_width / (GetScreenWidthMM / 25.4));
  ScreenInfo.PixelsPerInchY :=
    RoundToInt(gdk_screen_height / (GetScreenHeightMM / 25.4));
  ScreenInfo.ColorDepth := gdk_visual_get_system^.depth;

  {$if defined(cpui386) or defined(cpux86_64)}
  // needed otherwise some gtk theme engines crash with division by
zero
  {$IFNDEF DisableGtkDivZeroFix}
    {$IFDEF windows}
      Set8087CW($133F);
    {$ELSE}
      SetExceptionMask(GetExceptionMask + [exZeroDivide,exInvalidOp]);
    {$ENDIF}
  {$ENDIF}
  {$ifend}
end;     
in line start with "ScreenInfo.PixelsPerInchX := ...."

In my opinion it is BUG , this is correct version

Code: [Select]procedure TGtk2WidgetSet.AppInit(var ScreenInfo:
TScreenInfo);
begin
  {$if defined(cpui386) or defined(cpux86_64)}
  // needed otherwise some gtk theme engines crash with division by
zero
  {$IFNDEF DisableGtkDivZeroFix}
    {$IFDEF windows}
      Set8087CW($133F);
    {$ELSE}
      SetExceptionMask(GetExceptionMask + [exZeroDivide,exInvalidOp]);
    {$ENDIF}
  {$ENDIF}
  {$ifend}

  InitKeyboardTables;
  { Compute pixels per inch variable }
  ScreenInfo.PixelsPerInchX :=
    RoundToInt(gdk_screen_width / (GetScreenWidthMM / 25.4));
  ScreenInfo.PixelsPerInchY :=
    RoundToInt(gdk_screen_height / (GetScreenHeightMM / 25.4));
  ScreenInfo.ColorDepth := gdk_visual_get_system^.depth;

end;     
I submit small BUG 
http://mantis.freepascal.org/view.php?id=26649