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48107fc8
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2021-11-28T23:19:16
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build: Clarify link-time warnings
Mention the involved function instead of stating an implicit "this
function". Mention libbsd when proposing using an alternative libmd
to make the context clear.
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e7cf8c57
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2021-11-28T22:44:08
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Switch md5 compatibility logic back to direct linking
When using the recent dlsym() based wrapper, we are not requiring any
symbol from libmd, as we resolve those dynamically at run-time. We were
ending up linking against libmd because in another part of the code we
require (depending on the architecture) the SHA512 functions for the
getentropy() local implementation. But that function might be provided
by the system libc on some systems, which means we end up not linking
against libmd at all.
To solve this we go back to the previous simpler solution of linking
directly, which had the main drawback of then making programs fail to
link when not specifying -lmd (on platforms that need it). And then
switch the .so link point from a symlink to a linker script, so that we
can inject the -lmd library as-needed. This is similar to what glibc is
doing.
Fixes: commit 31f034e3862debda8615a449b1c11c4d6920dcc7
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e35d9141
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2021-02-11T04:41:46
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Add link-time warnings to MD5 wrapper functions
Let's get the word out that these functions are deprecated and should be
switched away from.
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31f034e3
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2021-02-09T05:57:37
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Switch libmd wrapper to use dlsym()
Switch from the previous versioned symbol implementation which required
users to also link against the message digest provider explicitly, or
they would fail to find the symbols, to an implementation that loads
the symbols from the linked library providing the functions using
dlsym(), thus preserving backwards compatibility.
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847e682f
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2021-02-07T00:09:30
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Use libmd hashing function implementations instead of embedding our own
This splits the implementation responsibilities, and reduces embedded
code copies, which was one of the driving points with this project to
start with, so it's nice to give a good example.
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