have_ld_preload = ['linux', 'freebsd', 'darwin', 'dragonfly'].contains(host_machine.system()) (from cairo/meson.build) because surely glibc's ld.so checks which kernel it's running on, and only enables LD_PRELOAD if running on Linux, right?

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   Sergey Bugaev (bugaevc@floss.social)'s status on Friday, 14-Jul-2023 23:50:30 JST Sergey Bugaev

   #Meson needs to learn that Linux is not an operating system unto itself.

   No really, like 95% checks for host_machine.system() == 'linux' are wrong, unless you really care about *kernel* specifics like Linux kernel modules. Typically what you want to check is:
   - is my compiler GCC / Clang? (use the Meson compiler object for that!)
   - is my libc (a recent enough) glibc?
   - does this system use a "freedesktop" GUI stack?
   - etc etc