Linker error with LLVM 15.0

[ChrisR]

All Lazarus MacOS projects (even new ones created with RC1) do not compile with MacOS Sonoma RC with the linker error:

-macosx_version_min has been renamed to -macos_version_min

Using `ld -v` reports the linker is part of LLVM 15.0.

[zeljko]

How then lazarus is built on your machine ?

[Jonas Maebe]

That's a pain. In clang they "fixed" this by changing the passed option name based on the name of the linker binary: https://reviews.llvm.org/D92037

Code: [Select]

      // FIXME: Remove lld.darwinnew here once it's the only MachO lld.
      if (LinkerIsLLD)
        *LinkerIsLLD = UseLinker == "lld" || UseLinker == "lld.darwinnew";
      if (LinkerIsLLDDarwinNew)
        *LinkerIsLLDDarwinNew = UseLinker == "lld.darwinnew";
 And the FIXME suggests even that ugly hack won't keep working indefinitely.

[ChrisR]

Just to clarify, I downloaded the Lazarus 3.0 RC 1 files, including the fpc sources. Lazarus is provided as a binary - I am unable to compile Lazarus as the linker gives an error.

Indeed, even the most basic fpc program (removing Lazarus from the equation) fails to compile. Consider:

program Hello;
begin
  writeln ('Hello, world.');
end.

This generates the following error:

% fpc hello.pas
Free Pascal Compiler version 3.2.2 [2021/05/16] for aarch64
Copyright (c) 1993-2021 by Florian Klaempfl and others
Target OS: Darwin for AArch64
Compiling hello.pas
Assembling hello
Linking hello
ld: warning: -multiply_defined is obsolete
-macosx_version_min has been renamed to -macos_version_min
ld: library 'c' not found
An error occurred while linking
hello.pas(3,27) Error: Error while linking
hello.pas(3,27) Fatal: There were 1 errors compiling module, stopping
Fatal: Compilation aborted

Further system details are

% clang -v
Apple clang version 15.0.0 (clang-1500.0.40.1)
Target: arm64-apple-darwin23.0.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin
% uname -a
Darwin chriss-Virtual-Machine.local 23.0.0 Darwin Kernel Version 23.0.0: Fri Sep 15 14:40:03 PDT 2023; root:xnu-10002.1.13~1/RELEASE_ARM64_VMAPPLE arm64
% xcode-select -v
xcode-select version 2399.


It is worth noting that I can compile large C programs fine - for example if you download my dcm2niix tool from Github you can simply run 'make' from the 'console' folder to compile and link from source.

[geraldholdsworth]

I've got something similar. My install has suddenly started reporting, on every build:

Code: [Select]

Compile Project, Mode: Default, Target: lib/Debug/x86_64-darwin/Logger: Success, Errors: 4
Error: ld: warning: -multiply_defined is obsolete
Error: -macosx_version_min has been renamed to -macos_version_min
Error: ld: warning: ignoring duplicate libraries: '-lc'
Error: ld: warning: no platform load command found in '/Users/geraldholdsworth/Library/Mobile Documents/com~apple~CloudDocs/Programming/Lazarus/Logger/lib/Debug/x86_64-darwin/Logger.or', assuming: macOSBut it still builds/compiles and links. I'm on Ventura (although it's wanting to upgrade to Sonoma) with the x86_64 version of Lazarus 2.2.6. Not sure why these errors started appearing, or how to stop them.

[ChrisR]

So I did find a solution. I created a fpc configuration file:
 nano ~/.fpc.cfg
and added the line:
 
-Fu/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX..platform/Developer/SDKs/MacOSX.sdk/usr/lib/

This allows the linker to find the file `libc.tbd` I determined this by running fpc in verbose mode on a machine that did compile my code successfully:
 fpc hello.pas -k-t

Note that with this change, I do get warnings, but my code compiles correctly:

% fpc hello.pas
ld: warning: -multiply_defined is obsolete
-macosx_version_min has been renamed to -macos_version_min
% ./hello
Hello, world.

As an aside, things worked fine on a machine I upgraded to LLVM15 that had previous installs of FPC/Lazarus: the issue I had was with a clean install of the new OS on a virtual machine.

[mischi]

after updating the Xcode command line tools from 14 to 15, I get linker errors in addition to the warnings, which prevent building fpc with macports. I have tried various changes to build options or even patches to source files but without success. Passing -k-w to the linker suppresses the annoying warning and makes life a bit easier. As to expect, -k-w does not resolve the error ;-)

/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_fpc/fpc/work/ppcx64 -Ur -Xs -O2 -n -Fux86_64 -Fusystems -Fu/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_fpc/fpc/work/fpcbuild-3.2.2/fpcsrc/rtl/units/x86_64-darwin -Fix86_64 -FE. -FUx86_64/units/x86_64-darwin -dRELEASE -ap -v0 -XR/Library/Developer/CommandLineTools/SDKs/MacOSX13.sdk   -dx86_64 -dGDB -dBROWSERLOG -Fux86 pp.pas
ld: warning: -multiply_defined is obsolete
-macosx_version_min has been renamed to -macos_version_min
ld: warning: pointer not aligned at _RTTI_$SYSTEM_$$_openchararray+0x16 from /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_fpc/fpc/work/fpcbuild-3.2.2/fpcsrc/rtl/units/x86_64-darwin/system.o
.
... skipping many alike warnings
.
ld: warning: pointer not aligned at _THREADVARLIST_$FPWIDESTRING+0xC from /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_fpc/fpc/work/fpcbuild-3.2.2/fpcsrc/rtl/units/x86_64-darwin/fpwidestring.o
ld: pointer not 4-byte aligned at __DATA_CONST+0x9A6, fix alignment or disable chained fixups
An error occurred while linking
pp.pas(252,36) Error: Error while linking
pp.pas(252,36) Fatal: There were 1 errors compiling module, stopping
Fatal: Compilation aborted

This is building ppca64 on an M1 Macbook with macOS 13, Xcode command line tools 15 starting with ppcx64 as bootstrap compiler at the cycling stage.  Any help?

[geraldholdsworth]

Do you know that you can have SDKs from previous macOS versions and specifically point to them instead of using the default one?

[Jonas Maebe]

So I did find a solution. I created a fpc configuration file:
 nano ~/.fpc.cfg
and added the line:
 
-Fu/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX..platform/Developer/SDKs/MacOSX.sdk/usr/lib/

This generally means that the Xcode command line tools are not installed. Does sudo xcode-select --install not solve it as well?

[mischi]

after updating the Xcode command line tools from 14 to 15, I get linker errors in addition to the warnings, which prevent building fpc with macports. I have tried various changes to build options or even patches to source files but without success. Passing -k-w to the linker suppresses the annoying warning and makes life a bit easier. As to expect, -k-w does not resolve the error ;-)

/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_fpc/fpc/work/ppcx64 -Ur -Xs -O2 -n -Fux86_64 -Fusystems -Fu/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_fpc/fpc/work/fpcbuild-3.2.2/fpcsrc/rtl/units/x86_64-darwin -Fix86_64 -FE. -FUx86_64/units/x86_64-darwin -dRELEASE -ap -v0 -XR/Library/Developer/CommandLineTools/SDKs/MacOSX13.sdk   -dx86_64 -dGDB -dBROWSERLOG -Fux86 pp.pas
ld: warning: -multiply_defined is obsolete
-macosx_version_min has been renamed to -macos_version_min
ld: warning: pointer not aligned at _RTTI_$SYSTEM_$$_openchararray+0x16 from /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_fpc/fpc/work/fpcbuild-3.2.2/fpcsrc/rtl/units/x86_64-darwin/system.o
.
... skipping many alike warnings
.
ld: warning: pointer not aligned at _THREADVARLIST_$FPWIDESTRING+0xC from /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_fpc/fpc/work/fpcbuild-3.2.2/fpcsrc/rtl/units/x86_64-darwin/fpwidestring.o
ld: pointer not 4-byte aligned at __DATA_CONST+0x9A6, fix alignment or disable chained fixups
An error occurred while linking
pp.pas(252,36) Error: Error while linking
pp.pas(252,36) Fatal: There were 1 errors compiling module, stopping
Fatal: Compilation aborted

This is building ppca64 on an M1 Macbook with macOS 13, Xcode command line tools 15 starting with ppcx64 as bootstrap compiler at the cycling stage.  Any help?

I finally found out that the problem shows up with the option -WM13.0. Replacing it by -WM11.0 resolved it.