In constructions such as 'for x in $(MAKEVAR); do ...', there's the
possibility that $(MAKEVAR) is en empty value.  Some shells don't like
that, so introduce a dummy value that gets discarded:

    for x in dummy $(MAKEVAR); do
        if [ "$$x" = "dummy" ]; then continue; fi

Closes RT#4459
Reviewed-by: NRich Salz <rsalz@openssl.org>

This gives us better control of what files are produced.
Reviewed-by: NAndy Polyakov <appro@openssl.org>

Closes RT#4447
Reviewed-by: NViktor Dukhovni <viktor@openssl.org>

One of the 'generate' targets depended on $(SRCDIR)/apps/progs.h,
which depended on...  nothing.  This meant it never got regenerated
once it existed, regardless of need.  Of course, we could have it
depend on all the files checked to generate it, but they also depend
on progs.h, so we'd end up getting cricular dependencies, which makes
make unhappy.

Furthermore, and this applies for the other generated files, having
them as targets means that they may be regenerated on the fly in some
cases, and since they get written to the source tree, this isn't such
a good idea if that tree is read-only (which is a possible situation
in an out-of-tree build).

So, we move all the actions to the 'generate' targets themselves, thus
making sure they get regenerated in a controlled manner and regardless
of dependencies.
Reviewed-by: NViktor Dukhovni <viktor@openssl.org>

This reverts commit 04e2a527.
Reviewed-by: NRich Salz <rsalz@openssl.org>

Some implementations of sed require a newline before an ending '}'.
The easier method is to replace that sed command with the
corresponding perl command.

Closes RT#4448
Reviewed-by: NRich Salz <rsalz@openssl.org>

Depending on what has been built so far, all .d files may not be
present and 'find' will exit with non-zero exit code.  This isn't a
bother for us but may break make, so clear the exit code with an added
'exit 0'.

Closes RT#4444
Reviewed-by: NRich Salz <rsalz@openssl.org>

Some of the files in $(DEPS) might not exist.  We don't need to know.
Reviewed-by: NRich Salz <rsalz@openssl.org>

generatesrc() did already receive dependency information, but never
used it, and never really needed to...  until now.
Reviewed-by: NRich Salz <rsalz@openssl.org>

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

Instead of relying on the '-nt' test operator, which doesn't exist
everywhere, use find's '-newer' to find out if any of the known .d
files is newer than Makefile.

Closes RT#4444
Reviewed-by: NAndy Polyakov <appro@openssl.org>

In most builds, we can assume that engines live in the build tree
subdirectory "engines".  This was hard coded into the tests that use
the engine ossltest.

However, that hard coding is tedious, it would need to be done in
every test recipe, and it's an incorrect assumption in some cases.

This change has us play it safe and let the build files tell the
testing framework where the engines are.
Reviewed-by: NViktor Dukhovni <viktor@openssl.org>

There was one spot that had hard-coded 'perl'
Reviewed-by: NRich Salz <rsalz@openssl.org>

Normally we always refer to source files relative to $SRCDIR in Makefiles.
However the reference to unix-Makefile.tmpl was using a fully expanded
absolute path. This can cause problems for Mingw.
Reviewed-by: NTim Hudson <tjh@openssl.org>
Reviewed-by: NRichard Levitte <levitte@openssl.org>

Make doesn't always treat multiline quoted strings as nicely as one
would wish.
Reviewed-by: NAndy Polyakov <appro@openssl.org>

In unix-Makefile.tmpl, this construction has been used a few times

	if ! something; then ...

It seems, though, that some shells do not understand !, so these need
to be changed.
Reviewed-by: NRich Salz <rsalz@openssl.org>

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

When passing down values to Makefile.shared, do so with single quotes
as much as possible to avoid having the shell create a mess of quotes.
Reviewed-by: NRich Salz <rsalz@openssl.org>

The variable SHARED_CFLAGS and SHARD_LDFLAGS were used in the Unix
template because they normally contain options used when building
"shared".  The Windows template, on the other hand, uses LIB_CFLAGS,
to express the intended use of those flags rather than their content.
The Windows template still used SHARED_LDFLAGS, which seems
inconsistent.

To harmonize the two, any SHARED_CFLAGS gets renamed to LIB_CFLAGS and
SHARED_LDFLAGS to LIB_LDFLAGS.  That makes the intent consistent along
with BIN_{C,LD}FLAGS and DSO_{C,LD}FLAGS.

Finally, make sure to pass down $(LIB_CFLAGS) or $(DSO_CFLAGS) along
with $(CFLAGS) when using Makefile.shared.
Reviewed-by: NRich Salz <rsalz@openssl.org>

It turns out that different sed implementations treat -i differently
to cause issues.  make it simpler by avoiding it entirely and give
perl the trust to be consistent enough.
Reviewed-by: NRich Salz <rsalz@openssl.org>

The issue is demonstrated as follows:

  On Linux:

    $ echo ': foo.h /usr/include/stddef.h bar.h' | sed -e 's/ \/\(\\.\|[^ ]\)*//g'
    : foo.h bar.h

  On MacOS X:

    $ echo ': foo.h /usr/include/stddef.h bar.h' | sed -e 's/ \/\(\\.\|[^ ]\)*//g'
    : foo.husr/include/stddef.h bar.h

Perl is more consistent:

  On Linux:

    $ echo ': foo.h /usr/include/stddef.h bar.h' | perl -pe 's/ \/(\\.|[^ ])*//g;'
    : foo.h bar.h

  On MacOS X:

    $ echo ': foo.h /usr/include/stddef.h bar.h' | perl -pe 's/ \/(\\.|[^ ])*//g;'
    : foo.h bar.h
Reviewed-by: NAndy Polyakov <appro@openssl.org>

If pre-processor failed, an empty .s file could be left behind,
which could get successfully compiled if one simply re-ran make
and cause linking failures. Not anymore. Remove even intermediate .S
in case of pre-processor failure.
Reviewed-by: NRichard Levitte <levitte@openssl.org>

One of them didn't clean away .d.tmp files properly.
The other would overwrite the .d files unconditionally, thereby
causing a possibly unnecessary dependency rebuild, which touches the
date of Makefile, which causes a possibly unnecessary rebuild of
buildinf.h and everything that depends on that.
Reviewed-by: NAndy Polyakov <appro@openssl.org>

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

The source file generators sometimes use $(CC) to post-process
generated source, and getting the inclusion directories may be
necessary at times, so we pass them down.

RT#4406
Reviewed-by: NRich Salz <rsalz@openssl.org>

This change is a bit more complex, as it involves several recipe
variants.

Also, remove the $(CROSS_COMPILE) prefix for the makedepend program.
When we use the program "makedepend", this doesn't serve anything,
and when we use the compiler, this value isn't even used.
Reviewed-by: NRich Salz <rsalz@openssl.org>

For assembler, we want the final target to be foo.s (lowercase s).
However, the build.info may have lines like this (note upper case S):

    GENERATE[foo.S]=foo.pl

This indicates that foo.s (lowercase s) is still to be produced, but
that producing it will take an extra step via $(CC) -E.  Therefore,
the following variants (simplified for display) can be generated:

    GENERATE[foo.S]=foo.pl  =>  foo.s: foo.pl
                                	$(PERL) $foo.pl $@.S; \
                                	$(CC) $(CFLAGS) -E -P $@.S > $@ && \
                                	rm -f $@.S

    GENERATE[foo.s]=foo.pl  =>  foo.s: foo.pl
                                	$(PERL) $foo.pl $@

    GENERATE[foo.S]=foo.m4  =>  foo.s: foo.m4
                                	m4 -B 8192 $foo.m4 > $@.S; \
                                	$(CC) $(CFLAGS) -E -P $@.S > $@ && \
                                	rm -f $@.S

    GENERATE[foo.s]=foo.m4  =>  foo.s: foo.m4
                                	m4 -B 8192 $foo.m4 > $@
Reviewed-by: NAndy Polyakov <appro@openssl.org>

For config targets such as 'dist', which doesn't have a BASE template,
we still need to have a default build scheme.

Additionally, the unified Makefile template's target 'tar' wasn't
quite as flexible as the unixmake one.

Finally, .travis-create-release.sh can be somewhat simplified now that
it builds with the unified build scheme.
Reviewed-by: NMatt Caswell <matt@openssl.org>

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

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

This construct in a Makefile is a bit overzealous:

	@echo FOO
	@FOO

Cleaned up.
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>

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

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

When building with GNU C, clang or VMS C, it's more efficient to
generate dependency file and object file in one call rather than two.
Have the dependency output in a temporary file and compare it with the
previous one if available to see if replacement is waranted, thereby
avoiding unnecessary reconstruction of Makefile / descrip.mms.

Github issue #750
Reviewed-by: NRich Salz <rsalz@openssl.org>

I read the PROBLEMS, and they're outdated; nothing I'd put in the
online FAQ, for example.  Test-builds work without using these files.
Had to remove the rehash.time stuff from Makefile.in
Reviewed-by: NRichard Levitte <levitte@openssl.org>

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

If the local system doesn't have GNU C or clang, and not even
makedepend, the build will stop because the call of 'makedepend'
fails.  This changes so the build won't stop because of such failure.
The result will be empty .d files, and that's ok.
Reviewed-by: NRich Salz <rsalz@openssl.org>

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

On slower file systems, this makes a huge difference
Reviewed-by: NRich Salz <rsalz@openssl.org>