Hi,
On 2024-12-02 17:11:30 -0500, Tom Lane wrote:
> I'm inclined to propose adding something like
> 
> CPPFLAGS="$CPPFLAGS -D_POSIX_C_SOURCE=200112L"
> 
> to src/template/solaris.  Not sure if we have a corresponding
> mechanism for meson, though.
elif host_system == 'sunos'
  portname = 'solaris'
  export_fmt = '-Wl,-M@0@'
  cppflags += '-D_POSIX_PTHREAD_SEMANTICS'
Should be trivial to add there.
Greetings,
Andres Freund