[Bug target/91135] [9/10 Regression] __linux__ not defined with -mcall-aixdesc on 9.x and ppc64

[gcc at octaforge dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91135

--- Comment #7 from Daniel Kolesa <gcc at octaforge dot org> ---
The actual reason why the linkage fails without the flag, for anyone interested
https://bugzilla.kernel.org/show_bug.cgi?id=204125#c6