https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95129
Bug ID: 95129
Summary: aarch64: make outline-atomics work on non-gnu targets
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: nsz at gcc dot gnu.org
Target Milestone: ---
the initializer in libgcc uses __getauxval which is not
available on non-gnu targets so outlining atomics is
ineffective.
change the runtime lse check in libgcc such that non-glibc
targets can implement it too (e.g. calling __getauxval via
a weak reference and no #ifdef __gnu_linux__ check allows
a libc to implement it later, unfortunately a non-linux os
may not have the same hwcap mechanism so a more generic
libc<->libgcc abi would be better).
