diff options
| -rw-r--r-- | pod/perlhacktips.pod | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/pod/perlhacktips.pod b/pod/perlhacktips.pod index e3ef6f9bbe..2f19c04b83 100644 --- a/pod/perlhacktips.pod +++ b/pod/perlhacktips.pod @@ -1391,7 +1391,8 @@ L<perlclib>. Under ithreads the optree is read only. If you want to enforce this, to check for write accesses from buggy code, compile with -C<-DPERL_DEBUG_READONLY_OPS> to enable code that allocates op memory +C<-Accflags=-DPERL_DEBUG_READONLY_OPS> +to enable code that allocates op memory via C<mmap>, and sets it read-only when it is attached to a subroutine. Any write access to an op results in a C<SIGBUS> and abort. |