--enable-dtrace produces compiler warnings about const correctness, except on macOS. That's because Apple's dtrace produces function declarations in probes.h that take strings as const char * whereas AFAIK on all other operating systems they take char * (you can see that possibly recent difference in Apple's version of dt_header_decl() in dt_program.c). People have complained before[1].
Maybe we should do what the Perl people do[2] and post-process the generated header file to add const qualifiers? Please see attached.
I have just added --enable-dtrace to my build farm animal elver so these warnings should appear at the next build. I wonder if the owners of damselfly, castoroides, protosciurus (CCed) would consider adding it for them too so that we could get some coverage of this build option on Illumos and Solaris.
