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)
Because there are already attributes with the dso_ prefix that are
used instead of the corresponding lib_ attributes rather than in
addition to them, it gets confusing to have similar or exactly the
same attributes working with different semantics on Unix.
So we rename those by changing the prefix dso_ to module_, and having
those work just like the shared_ attributes, but for DSOs.
Reviewed-by: Andy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/5534)
Support the following "make variables":
AR (GNU compatible)
ARFLAGS (GNU Compatible)
AS (GNU Compatible)
ASFLAGS (GNU Compatible)
CC (GNU Compatible)
CFLAGS (GNU Compatible)
CXX (GNU Compatible)
CXXFLAGS (GNU Compatible)
CPP (GNU Compatible)
CPPFLAGS (GNU Compatible)
CPPDEFINES List of CPP macro definitions. Alternative for -D
CPPINCLUDES List of CPP inclusion directories. Alternative for -I
HASHBANGPERL Perl invocation to be inserted after '#!' in public
perl scripts.
LDFLAGS (GNU Compatible)
LDLIBS (GNU Compatible)
RANLIB Program to generate library archive index
RC Program to manipulate Windows resources
RCFLAGS Flags for $(RC)
RM (GNU Compatible)
Setting one of these overrides the corresponding data from our config
targets. However, flags given directly on the configuration command
line are additional, and are therefore added to the flags coming from
one of the variables above or the config target.
Fixes#2420
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/5177)
This will replace the use of Makefile.shared
This also means a small adjustment on how the attributes dso_cflags,
dso_cxxflags and dso_lflags are treated. They were previously treated
as an extension to shared_cflag, shared_cxxflag and shared_ldflag, but
they should really be regarded as alternatives instead, for example
for darwin, where -dynamiclib is used for shared libraries and -bundle
for DSOs.
We take the opportunity to clean out things that are redundant or
otherwise superfluous (for example the check of GNU ld on platforms
where it never existed).
Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4840)
