George Kadianakis authored 6 years ago and teor committed 6 years ago

See https://trac.torproject.org/projects/tor/ticket/29528#comment:3
and https://bugs.llvm.org/show_bug.cgi?id=19535

Using an anonymous mmap() is a good way to get pages that we can set
kernel-level flags on, like minherit() or madvise() or mlock().
We're going to use that so that we can make uninheritable locked
pages to store PRNG data.

We now accumulate warning flags in a separate variable,
"TOR_WARNING_FLAGS", and write it to a "warning_flags" file.  Then
we test whether the compiler will accept "@warning_flags": if so, we
put "@warning_flags" in the CFLAGS; if not, we copy the contents of
"$TOR_WARNING_FLAGS" into the CFLAGS.

Closes ticket 28924.

This updateVersions.pl script was one of the only essential perl
scripts left in out maint system, and was the only one that used
autoconf to fill in the script.

This script adds a feature to define an APPROX_RELEASE_DATE macro
that is updated when the version changes.  We'll use this to
implement prop297, so that we have an accurate view of when a
release date happens.

Failing to do on clients was causing TLS 1.3 negotiation to fail.

Fixes bug 28245; bugfix on 0.2.9.15, when we added TLS 1.3 support.

This'll help retain test compatibility until 1.31.0 is released!