Hi,

I have rather large program that fails to link - "Undefined symbol: .Lj3016"

The only difference with previous cases when link was successful is that I added "indylaz" package - not sure if there is a connection...

What can I do or try to diagnose/resolve this issue?

(9022) Compiling resource lib\x86_64-win64\configserver.obj

(9015) Linking .\configserver.exe

Error: Undefined symbol: .Lj3016

Fatal: (10026) There were 1 errors compiling module, stopping

Fatal: (1018) Compilation aborted

Error: c:\lazarus\fpc\3.2.0\bin\x86_64-win64\ppcx64.exe returned an error exitcode

Thanks,

Gennady

On Sat, Sep 4, 2021 at 3:26 AM Gennady Agranov via fpc-devel wrote:

IIRC then there were som bugs regarding optimization in win64. You can try to compile with optimizations disabled: -O- (or use the Lazarus dialog to do so).

Thanks!

It did not help - both 3.0.2 and 3.2.2 when compile my code fail at the link phase

Target platform is Win64

Error: Undefined symbol: .Lj<4 digit number>

As I understand .Lj<4 digit number> is a label - not some external identifier

I guess I probably have too much code to link?

Are there some linker arguments I can add that would help?

Is it possible to specify some other linker?

Thanks,
Gennady

Hi,

linker complains about undefined symbol  .Lj3016

I checked *.s files and found that one file has no label .Lj3016 but has following line:

    leaq       .Lj3016(%rip),%rdx

Am I correct that that this *.s file should also have a label?

Thanks,
Gena

Yes. Can you show more of what the surrounding code is doing (you should compile with -al so that the code lines are contained there as well if you haven't done so already) and what optimization options are you using for compilation?

Regards,
Sven

I believe it's the same issue I have in https://gitlab.com/freepascal.org/fpc/source/-/issues/39140

Compiler builds release binaries fine.

-- Regards,
Denis Golovan

denisgolovan wrote

>> Compiler builds release binaries fine.

What do you mean - it should work on "trunk"?

it is probably "generics" related, and i tried both official releases - 3.2.0 and 3.2.2 - the same sad result

I suspect inlining did it as my code does not raise exception - but obviously i can be mistaken

.Lj3219:
    leaq RESSTR_$GENERICS.STRINGS_$$_SDICTIONARYKEYDOESNOTEXIST+8(%rip),%r8     movq    $1,%rdx
    leaq    VMT_$CLASSES_$$_ELISTERROR(%rip),%rcx *   call SYSUTILS$_$EXCEPTION_$__$$_CREATERES$PANSISTRING$$EXCEPTION*     movq    %rax,%rcx
    leaq    .Lj3222(%rip),%rdx

How can one tell compiler to allow "inline" modifier, but ignore it?

Thanks,
Gena

No. I mean it should work when -g and stuff like that is _omitted_. Thus compiler does not produce debug info.

it is probably "generics" related, and i tried both official releases - 3.2.0 and 3.2.2 - the same sad result

Yeap. My issue is about generics AFAIR.

I suspect inlining did it as my code does not raise exception - but obviously i can be mistaken

No idea really.

-- Regards,
Denis Golovan

Hi,

Sorry for delay - my first email was rejected because i have attached "undefined_symbol.s" uncompressed

I am attaching zip archive with 2 files

undefined_symbol.pas
undefined_symbol.s

*(fpc -Mdelphi -al -Cn undefined_symbol.pas)*

There is line

    leaq    .Lj3222(%rip),%rdx

but I do not see  the label definition :(

Thanks,
Gena