Experience has shown that dynamic engines with their own copy of
libcrypto is problematic, so we disable that possibility.
Reviewed-by: NMatt Caswell <matt@openssl.org>

Reviewed-by: NStephen Henson <steve@openssl.org>

This corrects a fault where the inner IF in this example was still
being acted upon:

  IF[0]
    ...whatever...
    IF[1]
      ...whatever more...
    ENDIF
  ENDIF

With this change, the inner IF is skipped over.
Reviewed-by: NMatt Caswell <matt@openssl.org>

The "extra checks" is a debugging tool to check the config resolving
mechanism.  It uses Perl's smart match, which is experimental and
therefore always causes Perl to give out a warning, and it causes
older Perl versions to fail entirely.

So, it gets commented away, but stays otherwise in place, as it may be
useful again.
Reviewed-by: NMatt Caswell <matt@openssl.org>

If we find an IF within a clause that's skipped over, set it to be
skipped as well.
Reviewed-by: NMatt Caswell <matt@openssl.org>

All OpenSSL code has now been transferred to use the new threading API,
so the old one is no longer used and can be removed. We provide some compat
macros for removed functions which are all no-ops.

There is now no longer a need to set locking callbacks!!
Reviewed-by: NRichard Levitte <levitte@openssl.org>

Reviewed-by: NMatt Caswell <matt@openssl.org>

Reviewed-by: NAndy Polyakov <appro@openssl.org>

According to manuals found here: https://gcc.gnu.org/onlinedocs/, GNU
C version 3 and on support the dependency generation options.  We
therefore need to check the gcc version to see if we're going to use
it or makedepend for dependency generation.
Reviewed-by: NAndy Polyakov <appro@openssl.org>

If no makedepend program or equaly capable compiler is present,
'makedepend' gets disabled automatically.
Reviewed-by: NRich Salz <rsalz@openssl.org>

Reviewed-by: NMatt Caswell <matt@openssl.org>

This reverts commit 242ffb05.
Reviewed-by: NMatt Caswell <matt@openssl.org>

Not all platforms support multiblock. Building without it fails prior to
this fix.

RT#4396
Reviewed-by: NRichard Levitte <levitte@openssl.org>

Should it be needed because the recipes within a RAW section might
clash with those generated by Configure, it's possible to tell it
not to generate them with the use of OVERRIDES, for example:

    SOURCE[libfoo]=foo.c bar.c

    OVERRIDES=bar.o
    BEGINRAW[Makefile(unix)]
    bar.o: bar.c
        $(CC) $(CFLAGS) -DSPECIAL -c -o $@ $<
    ENDRAW[Makefile(unix)]
Reviewed-by: NRich Salz <rsalz@openssl.org>

In some cases, one might want to generate some source files from
others, that's done as follows:

    GENERATE[foo.s]=asm/something.pl $(CFLAGS)
    GENERATE[bar.s]=asm/bar.S

The value of each GENERATE line is a command line or part of it.
Configure places no rules on the command line, except the the first
item muct be the generator file.  It is, however, entirely up to the
build file template to define exactly how those command lines should
be handled, how the output is captured and so on.
Reviewed-by: NRich Salz <rsalz@openssl.org>

Misc afalg build fixes as suggested by Richard Levitte for the latest
Configure changes.
Reviewed-by: NRichard Levitte <levitte@openssl.org>

1. Cleaned up eventfd handling
2. Reworked socket setup code to allow other algorithms to be added in
   future
3. Fixed compile errors for static build
4. Added error to error stack in all cases of ALG_PERR/ALG_ERR
5. Called afalg_aes_128_cbc() from bind() to avoid race conditions
6. Used MAX_INFLIGHT define in io_getevents system call
7. Coding style fixes
Reviewed-by: NRichard Levitte <levitte@openssl.org>
Reviewed-by: NMatt Caswell <matt@openssl.org>

Reviewed-by: NRichard Levitte <levitte@openssl.org>
Reviewed-by: NMatt Caswell <matt@openssl.org>

Reviewed-by: NRich Salz <rsalz@openssl.org>

Reviewed-by: NRich Salz <rsalz@openssl.org>
Reviewed-by: NEmilia Kasper <emilia@openssl.org>

MR: #2203

RC4 based ciphersuites in libssl have been disabled by default. They can
be added back by building OpenSSL with the "enable-weak-ssl-ciphers"
Configure option at compile time.
Reviewed-by: NRich Salz <rsalz@openssl.org>

The proper logic is that both zlib and zlib-dynamic are disabled by
default and that enabling zlib-dynamic would enable zlib.  Somewhere
along the way, the logic got changed, zlib-dynamic was enabled by
default and zlib didn't get automatically enabled.

This change restores the original logic.
Reviewed-by: NRich Salz <rsalz@openssl.org>

We copied $target{cflags}, $target{defines} and a few more to %config,
just to add to the entries.  Avoid doing so, and let the build templates
deal with combining the two.

There are a few cases where we still fiddle with %target, but that's
acceptable.
Reviewed-by: NAndy Polyakov <appro@openssl.org>

The thread_cflag setting filled a double role, as kinda sorta an
indicator of thread scheme, and as cflags.  Some configs also added
lflags and ex_libs for multithreading regardless of if threading would
be enabled or not.

Instead of this, add threading cflags among in the cflag setting,
threading lflags in the lflag setting and so on if and only if threads
are enabled (which they are by default).

Also, for configs where there are no special cflags for threading (the
VMS configs are of that kind), this makes it possible to still clearly
mention what thread scheme is used.

The exact value of thread scheme is currently ignored except when it's
"(unknown)", and thereby only serves as a flag to tell if we know how
to build for multi-threading in a particular config.  Yet, the
currently used values are "(unknown)", "pthreads", "uithreads" (a.k.a
solaris threads) and "winthreads".
Reviewed-by: NAndy Polyakov <appro@openssl.org>

Instead, make the build type ("debug" or "release") available through
$config{build_type} and let the configs themselves figure out what the
usual settings (such as "cflags", "lflags" and so on) should be
accordingly.

The benefit with this is that we can now have debug and release
variants of any setting, not just those Configure supports, and may
also involve other factors (the MSVC flags /MD[d] and /MT[d] involve
both build type and whether threading is enabled or not)
Reviewed-by: NAndy Polyakov <appro@openssl.org>

$target{lflags} and $target{plib_flag} were copied to %config for no
good reason.
Reviewed-by: NAndy Polyakov <appro@openssl.org>

Configure had the Unix centric addition of -lz when linking with zlib
is enabled, which doesn't work on other platforms.  Therefore, we move
it to the BASE_unix config template and add corresponding ones in the
other BASE_* config templates.  The Windows one is probably incomplete,
but that doesn't matter for the moment, as mk1mf does it's own thing
anyway.

This required making the %withargs table global, so perl snippets in
the configs can use it.
Reviewed-by: NAndy Polyakov <appro@openssl.org>

These BASE templates are intended to hold values that are common for
all configuration variants for whole families of configurations.

So far, three "families" are identified: Unix, Windows and VMS, mostly
characterised by the build system they currently use.
Reviewed-by: NAndy Polyakov <appro@openssl.org>

This provides for more powerful lazy evaluation and buildup of the
setting contents.  For example, something like this becomes possible:

    defines => [ sub { $config{thisorthat} ? "FOO" : () } ]

Any undefined result of such functions (such as 'undef' or the empty
list) will be ignored.
Reviewed-by: NAndy Polyakov <appro@openssl.org>

We allow some commands to be overriden, but didn't handle that in a
consistent manner.
Reviewed-by: NAndy Polyakov <appro@openssl.org>

There are cases, for example when configuring no-asm, that the added
uplink source files got in the way of the cpuid ones.  The best way to
solve this is to separate the two.
Reviewed-by: NAndy Polyakov <appro@openssl.org>

Reviewed-by: NAndy Polyakov <appro@openssl.org>

Reviewed-by: NAndy Polyakov <appro@openssl.org>

Reviewed-by: NRich Salz <rsalz@openssl.org>

Reviewed-by: NRich Salz <rsalz@openssl.org>

Reviewed-by: NMatt Caswell <matt@openssl.org>

They now default to " " as separator, but that can be overridden by
having a hash with parameters as last argument.  The only currently
recognised parameter is `separator'.

The special separator `undef' will force the result to become a list
rather than a concatenated string.
Reviewed-by: NAndy Polyakov <appro@openssl.org>

In the earlier change, where static libraries get built with position
independent code, OPENSSL_PIC was removed by mistake.  This adds it
back.
Reviewed-by: NTim Hudson <tjh@openssl.org>

Reviewed-by: NRichard Levitte <levitte@openssl.org>

Reviewed-by: NRich Salz <rsalz@openssl.org>