Ancient gcc says
src/or/connection.c:1843: warning: passing argument 1 of 'TO_OR_CONN' discards qualifiers from pointer target type src/or/connection.c:1843: warning: passing argument 1 of 'TO_OR_CONN' discards qualifiers from pointer target type src/test/test_dir.c:3700: warning: assuming signed overflow does not occur when assuming that (X - c) >= X is always true src/test/test_dir.c:3828: warning: assuming signed overflow does not occur when assuming that (X - c) >= X is always true src/test/vote_descriptors.inc:93: warning: string length '4135' is greater than the length '4095' ISO C99 compilers are required to support src/test/test_microdesc.c:654: warning: string length '5844' is greater than the length '4095' ISO C99 compilers are required to support src/test/test_descriptors.inc:305: warning: string length '10571' is greater than the length '4095' ISO C99 compilers are required to support