djgpp: Inherit config from BASE_unix

Build failed on djgpp due to missing config vars 'AR' and 'ARFLAGS'.
Additionally, '-lz' was not added to 'lflags' when zlib support was
enabled.

djgpp: Inherit config from BASE_unix

Build failed on djgpp due to missing config vars 'AR' and 'ARFLAGS'.
Additionally, '-lz' was not added to 'lflags' when zlib support was
enabled. Inheriting configuration variables from BASE_unix solves both
these issues.

CLA: trivial

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19274)

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Configure: final cleanup of asm related things

Remove the *_asm templates in Configurations/00-base-templates.conf,
all attempts to inherit them, and the asm() perl function.

[e

Configure: final cleanup of asm related things

Remove the *_asm templates in Configurations/00-base-templates.conf,
all attempts to inherit them, and the asm() perl function.

[extended tests]

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9166)

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Configure: add mechanism to specify asm target architecture

As preparation for moving asm file specs to build.info files, we must
make sure there is still some base information to help s

Configure: add mechanism to specify asm target architecture

As preparation for moving asm file specs to build.info files, we must
make sure there is still some base information to help select the
correct files.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9166)

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Make "make variables" config attributes for overridable flags

With the support of "make variables" comes the possibility for the
user to override them. However, we need to make a differ

Make "make variables" config attributes for overridable flags

With the support of "make variables" comes the possibility for the
user to override them. However, we need to make a difference between
defaults that we use (and that should be overridable by the user) and
flags that are crucial for building OpenSSL (should not be
overridable).

Typically, overridable flags are those setting optimization levels,
warnings levels, that kind of thing, while non-overridable flags are,
for example, macros that indicate aspects of how the config target
should be treated, such as L_ENDIAN and B_ENDIAN.

We do that differentiation by allowing upper case attributes in the
config targets, named exactly like the "make variables" we support,
and reserving the lower case attributes for non-overridable project
flags.

Reviewed-by: Andy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/5534)

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Separate general linking flags from extra libraries

So far, we've placed all extra library related flags together, ending
up in the make variable EX_LIBS. This turns out to be problemat

Separate general linking flags from extra libraries

So far, we've placed all extra library related flags together, ending
up in the make variable EX_LIBS. This turns out to be problematic, as
for example, some compilers don't quite agree with something like
this:

cc -o foo foo.o -L/whatever -lsomething

They prefer this:

cc -L/whatever -o foo foo.o -lsomething

IBM's compiler on OS/390 is such a compiler that we know of, and we
have previously handled that as a previous case.

The answer here is to make a more general solution, where linking
options are divided in two parts, where one ends up in LDFLAGS and
the other in EX_LIBS (they corresponds to what is called LDFLAGS and
LDLIBS in the GNU world)

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/5033)

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Configure: Add read_eval_file, a general purpose perl file reader/evaluator

It will return the last expression from the input file.

We also use this in read_config, which slightly c

Configure: Add read_eval_file, a general purpose perl file reader/evaluator

It will return the last expression from the input file.

We also use this in read_config, which slightly changes what's
expected of Configurations/*.conf. They do not have to assign
%targets specifically. On the other hand, the table of configs MUST
be the last expression in each of those files.

Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4840)

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Move the DJGPP target to its own config.

DJGPP is a 3rd party configuration, we rely entirely on the OpenSSL to
help us fine tune and test. Therefore, it's moved to its own config.

Move the DJGPP target to its own config.

DJGPP is a 3rd party configuration, we rely entirely on the OpenSSL to
help us fine tune and test. Therefore, it's moved to its own config.

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

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