Cannot compile Lazarus. Linker fails.
lazarus / 1-Linux

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mm7 · 2025-04-07 12:49

I recompiled FPC with debug option OPT="-gl".
After that Lazarus stopped compile with error "checksum differ".
I need to rebuild Lazarus now.
I call
Code: Bash  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i cd
/usr/share/lazarus/3.8.0make OPT="-g -gl" 
But it fails on linking face with
Code: Text  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i make -C ide
lazbuilder LCL_PLATFORM=noguimake[1]: Entering directory
'/usr/share/lazarus/3.8.0/ide'make --assume-new=lazbuild.lpr lazbuild
OPT='-Fu../packager/units/x86_64-linux
-Fu../components/codetools/units/x86_64-linux
-Fu../components/debuggerintf/lib/x86_64-linux
-Fu../components/lazutils/lib/x86_64-linux
-Fu../components/freetype/lib/x86_64-linux
-Fu../lcl/units/x86_64-linux -Fu../lcl/units/x86_64-linux/nogui
-Fu../components/buildintf/units/x86_64-linux
-Fu../components/ideintf/units/x86_64-linux/nogui
-Fu../components/synedit/units/x86_64-linux/nogui
-Fu../components/lazcontrols/lib/x86_64-linux/nogui
-Fu../components/lazcontrols/design/lib/x86_64-linux/nogui
-Fu../components/lazdebuggers/lazdebuggerintf/lib/x86_64-linux -Fu../c
omponents/lazdebuggers/cmdlinedebuggerbase/lib/x86_64-linux/nogui
-Fu../components/lazdebuggergdbmi/units/x86_64-linux/nogui
-Fu../components/lclextensions/lib/x86_64-linux-nogui
-Fu../components/virtualtreeview/lib/x86_64-linux-nogui
-Fu../components/fpdebug/lib/x86_64-linux
-Fu../components/lazdebuggers/lazdebuggerfp/lib/x86_64-linux/nogui
-Fu../components/lazdebuggers/lazdebuggerlldb/lib/x86_64-linux/nogui
-Fu../components/lazdebuggers/lazdebuggerfplldb/lib/x86_64-linux/nogui
-Fupackages/ideconfig/lib/x86_64-linux/nogui
-Fupackages/idedebugger/lib/x86_64-linux/nogui  'make[2]: Entering
directory '/usr/share/lazarus/3.8.0/ide'/usr/lib/fpc/3.2.2/ppcx64 -gl
-vbqewnhi -Sci -dlclnogui -Fu../designer -Fu../debugger
-Fu../debugger/frames -Fu../converter -Fu../packager
-Fu../packager/frames -Fu../components/custom -Fuframes -Fu.
-Fu/usr/lib/fpc/3.2.2/units/x86_64-linux/rtl -Fiinclude
-Fiinclude/linux -Fi../images -FE.. -FU../units/x86_64-linux/nogui -Cg
-Fl/usr/lib/gcc/x86_64-linux-gnu/11 -Fu../packager/units/x86_64-linux
-Fu../components/codetools/units/x86_64-linux
-Fu../components/debuggerintf/lib/x86_64-linux
-Fu../components/lazutils/lib/x86_64-linux
-Fu../components/freetype/lib/x86_64-linux
-Fu../lcl/units/x86_64-linux -Fu../lcl/units/x86_64-linux/nogui
-Fu../components/buildintf/units/x86_64-linux
-Fu../components/ideintf/units/x86_64-linux/nogui
-Fu../components/synedit/units/x86_64-linux/nogui
-Fu../components/lazcontrols/lib/x86_64-linux/nogui
-Fu../components/lazcontrols/design/lib/x86_64-linux/nogui
-Fu../components/lazdebuggers/lazdebuggerintf/lib/x86_64-linux -Fu../c
omponents/lazdebuggers/cmdlinedebuggerbase/lib/x86_64-linux/nogui
-Fu../components/lazdebuggergdbmi/units/x86_64-linux/nogui
-Fu../components/lclextensions/lib/x86_64-linux-nogui
-Fu../components/virtualtreeview/lib/x86_64-linux-nogui
-Fu../components/fpdebug/lib/x86_64-linux
-Fu../components/lazdebuggers/lazdebuggerfp/lib/x86_64-linux/nogui
-Fu../components/lazdebuggers/lazdebuggerlldb/lib/x86_64-linux/nogui
-Fu../components/lazdebuggers/lazdebuggerfplldb/lib/x86_64-linux/nogui
-Fupackages/ideconfig/lib/x86_64-linux/nogui
-Fupackages/idedebugger/lib/x86_64-linux/nogui -dx86_64
lazbuild.lprHint: (11030) Start of reading config file
/etc/fpc.cfgHint: (11031) End of reading config file /etc/fpc.cfgFree
Pascal Compiler version 3.2.2 [2025/04/05] for x86_64Copyright (c)
1993-2021 by Florian Klaempfl and others(1002) Target OS: Linux for
x86-64(3104) Compiling
lazbuild.lpr/usr/share/lazarus/3.8.0/ide/lazbuild.lpr(35,25) Warning:
(5075) Unit "UITypes" is deprecated: "Use System.UITypes instead
(available since FPC
3.2.0)"/usr/share/lazarus/3.8.0/ide/lazbuild.lpr(89,48) Hint: (5024)
Parameter "Filename" not
used/usr/share/lazarus/3.8.0/ide/lazbuild.lpr(86,43) Hint: (5024)
Parameter "Code" not
used/usr/share/lazarus/3.8.0/ide/lazbuild.lpr(87,21) Hint: (5024)
Parameter "Filename" not
used/usr/share/lazarus/3.8.0/ide/lazbuild.lpr(106,31) Hint: (5024)
Parameter "DlgType" not
used/usr/share/lazarus/3.8.0/ide/lazbuild.lpr(106,58) Hint: (5024)
Parameter "Buttons" not
used/usr/share/lazarus/3.8.0/ide/lazbuild.lpr(107,37) Hint: (5024)
Parameter "HelpKeyword" not
used/usr/share/lazarus/3.8.0/ide/lazbuild.lpr(109,31) Hint: (5024)
Parameter "DlgType" not
used/usr/share/lazarus/3.8.0/ide/lazbuild.lpr(109,58) Hint: (5024)
Parameter "Buttons" not
used/usr/share/lazarus/3.8.0/ide/lazbuild.lpr(110,37) Hint: (5024)
Parameter "HelpKeyword" not
used/usr/share/lazarus/3.8.0/ide/lazbuild.lpr(631,97) Hint: (5091)
Local variable "InheritedOptionStrings" of a managed type does not
seem to be
initialized/usr/share/lazarus/3.8.0/ide/lazbuild.lpr(1828,5) Warning:
(5066) Symbol "GetCompiledTargetOS" is deprecated: "use
FPCAdds"/usr/share/lazarus/3.8.0/ide/lazbuild.lpr(1839,5) Warning:
(5066) Symbol "GetCompiledTargetCPU" is deprecated: "use
FPCAdds"(9022) Compiling resource
../units/x86_64-linux/nogui/lazbuild.or(9015) Linking
../lazbuild/usr/bin/ld:
/usr/share/lazarus/3.8.0/lcl/units/x86_64-linux/intfgraphics.o: in
function `.La16':intfgraphics.pas:(.debug_info+0x8961): undefined
reference to `DBG2_$SYSTEM_$$_IUNKNOWN'/usr/bin/ld:
/usr/share/lazarus/3.8.0/lcl/units/x86_64-linux/intfgraphics.o: in
function `.La18':intfgraphics.pas:(.debug_info+0x89f0): undefined
reference to `DBG2_$SYSTEM_$$_IUNKNOWN'/usr/bin/ld:
/usr/share/lazarus/3.8.0/lcl/units/x86_64-linux/graphics.o: in
function `.La151':graphics.pp:(.debug_info+0x1dc5a): undefined
reference to `DBG2_$SYSTEM_$$_IUNKNOWN'/usr/bin/ld:
/usr/share/lazarus/3.8.0/lcl/units/x86_64-linux/graphics.o: in
function `.La152':graphics.pp:(.debug_info+0x1dd1b): undefined
reference to `DBG2_$SYSTEM_$$_IUNKNOWN'/usr/bin/ld:
/usr/share/lazarus/3.8.0/lcl/units/x86_64-linux/imagelistcache.o: in
function `.La1':imagelistcache.pas:(.debug_info+0x170): undefined
reference to `DBG2_$SYSTEM_$$_IUNKNOWN'/usr/bin/ld: /usr/share/lazarus
/3.8.0/components/ideintf/units/x86_64-
linux/nogui/idehelpintf.o:idehelpintf.pas:(.debug_info+0xc48): more
undefined references to `DBG2_$SYSTEM_$$_IUNKNOWN'
follow/usr/share/lazarus/3.8.0/ide/lazbuild.lpr(1883,1) Error: (9013)
Error while linking/usr/share/lazarus/3.8.0/ide/lazbuild.lpr(1883,1)
Fatal: (10026) There were 1 errors compiling module, stoppingFatal:
(1018) Compilation aborted 
Why it generates DBG2_$SYSTEM_$$_IUNKNOWN symbol? And other DBG2?
When I compiled FPC with OPT="-gl" it did not generate any
DBG2_$SYSTEM_$$_IUNKNOWN.
Is it DWARF2 specified somewhere by default?
I checked /etc/fpc.cfg all debug options are commented there.

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marcov · 2025-04-07 13:58

FPC units may have been precompiled with some settings ?  The build in
the lazarus dir only builds lazarus.

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mm7 · 2025-04-07 16:01

FPC units have been built into new empty location with OPT="-gl".

> The build in the lazarus dir only builds lazarus.
I know, but it refers to some FPC units like System.
My understanding the linker expects the symbol
DBG2_$SYSTEM_$$_IUNKNOWN symbol should be defined in rtl/system.o

There is DBG_$SYSTEM_$$_IUNKNOWN
and couple of DBG2 symbols like DBG2_$SYSTEM_$$_TOBJECT

But there is no DBG2_$SYSTEM_$$_IUNKNOWN.
That is why ld is not happy.

Should I recompile FPC with some more debugging options?

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mm7 · 2025-04-07 23:04

I've cleaned up all compiled binaries (make clean; make distclean) for
Lazarus and rebuilt with( make bigide OPT="-gl -gw3 -O-" )
This helped.

Then removed ~/.lazarus/lib and recompiled from IDE  again with
options "-gl -gw3 -O-" and target ~/.lazarus/

Now I can build projects and debug deep into LCL and RTL.