[Bug sanitizer/80953] Support libsanitizer on Solaris

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80953

--- Comment #30 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Is already included in sol2.h (ASAN_CC1_SPEC).

OK.  Then unwind info is needed in the epilogue?