Re: libxkbcommon version-script detection

Test works ok when using clang18 from ports

> On 10 Jan 2025, at 11:19, Dimitry Andric <dim@FreeBSD.org> wrote:
> 
> On 10 Jan 2025, at 10:22, Peter Blok <pblok@bsd4all.org> wrote:
>> 
>> I have recompiled x11/libxkbcommon and it fails to detect if the compiler/linker supports versioned symbols. As a result other code expecting the versioned symbol to exist, fail to link.
>> 
>> C compiler for the host machine: cc (clang 19.1.5 "FreeBSD clang version 19.1.5 (https://github.com/llvm/llvm-project.git llvmorg-19.1.5-0-gab4b5a2db582)")
>> C linker for the host machine: cc ld.lld 19.1.5
>> 
>> Below the meson.build check. If I force have_version_script to true, the versioned symbols are created and other code links fine.
>> 
>> # Supports -Wl,--version-script?
>> have_version_script = cc.links(
>>   'int main(){}',
>>   args: '-Wl,--undefined-version,--version-script=' + meson.current_source_dir()/'xkbcommon.map',
>>   name: '-Wl,--version-script',
>> )
>> 
>> Below the output for the test.
>> 
>> Checking if "-Wl,--version-script" : links: NO
>> 
>> If I create test.c with content "int main(){}” and compile it manually with the same flags AFAIK, it compiles ok. No errors.
>> 
>> However when I capture "make configure" with ktrace, it fails with the error below.
>> 
>> ld: error: non-exported symbol 'environ' in '/usr/lib/crt1.o' is referenced by DSO '/lib/libc.so.7'
>>       ld: error: non-exported symbol '__progname' in '/usr/lib/crt1.o' is referenced by DSO '/lib/libc.so.7'
>>       cc: error: linker command failed with exit code 1 (use -v to see invocation)
>> 
>> What flags need to be added in meson.build to allow it to work?
>> 
>> BTW This is on recent stable, but I suspect it fails the same way on current which I do not run at the moment.
> 
> It works just fine on -CURRENT:
> 
> ...
> Checking if "-Wl,--version-script" : links: YES
> 
> Not sure what is going wrong in your environment. Is this stable/14?
> 
> -Dimitry
>