Re: [PATCH] meson.build: Add --enable-use-pdb option

> On 30. Mar 2026, at 18:33, Paolo Bonzini <[email protected]> wrote:
> 
> On 3/18/26 20:18, Steve Aarnio wrote:
>> This option will (attempt to) modify the QEMU compile and link flags to
>> emit PDB symbol files rather than the standard (DWARF?) symbol output
>> from gcc/clang.
>> This enables using native Windows debug tools (Windbg/Visual Studio) for
>> debugging QEMU.
>> Signed-off-by: Steve Aarnio <[email protected]>
> 
> I would prefer to have support for this in Meson itself, but anyway, I have some questions below
> 
>> +if get_option('debug') and get_option('use_pdb')
>> +  qemu_common_flags += cc.get_supported_arguments('-g','-gcodeview','- gcolumn-info','-fno-omit-frame-pointer')
> 
> GCC documentation says -gcolumn-info enabled by default, also who is enabling -fomit-frame-pointer so that you have to drop it?

Hello,

https://clang.llvm.org/docs/ClangCommandLineReference.html#cmdoption-clang-fomit-frame-pointer

Clang documentation says:
On many targets, -O1 and higher omit the frame pointer by default

> 
>> +  qemu_ldflags += cc.get_supported_link_arguments('-g','-Wl,--pdb=')
> 
> What linkers support --pdb=, and what goes after the equal sign?

lld, and pdb= is enough to have an autogenerated path (output[.pdb]).

gcc and GNU ld don't support this.

> 
> Also, the update to scripts/meson-buildoptions.sh is missing, just running "make" will regenerate it.
> 
> Paolo
> 
>