[openssl-dev] [openssl.org #1979] Add uClibc support

[Short, Todd via RT]

OpenSSL is generally able to compile with the musl C library (same idea as uClibc):

OpenSSL 1.0.2f:
./config
make depend
CC=/usr/local/bin/musl-gcc ./config
make

./config is run twice, because "make depend" fails since domd can’t find the makedepend command after CC is set to musl-gcc. However, after running ./config a second time (to update the CC), the make succeeds. openssl loads and run. If musl is configured with --disable-shared, then it does not require any dynamic executables.

master:
CC=/usr/local/bin/musl-gcc ./config
make depend
make
"make depend" succeeds in master, even after CC is set to musl-gcc. But linking fails due to setcontext, getcontext and makecontext being undefined. They appear to be used by the async code; there doesn’t seem to be a way to turn off async (or force NULL async). I looked in the musl library, and there are declarations of these functions()s, but no definitions.

A maintainer of the musl library has indicated that these are deprecated Posix APIs. Might there be a way to disable the use of these APIs, and permit only async_none so that these other libraries (uClibc and musl) could be used instead?

--
-Todd Short
// tshort at akamai.com<mailto:tshort at akamai.com>
// "One if by land, two if by sea, three if by the Internet."

On Feb 3, 2016, at 9:00 PM, Salz, Rich via RT <rt at openssl.org<mailto:rt at openssl.org>> wrote:

This might be interesting to support, but unfortunately nobody looked at the
bug in years and the build process has changed a great deal. If you could
re-integrate this against what's in master, we'd look at it. If that's too much
work, I understand. We don't have/use this particular run-time environment.
--
Rich Salz, OpenSSL dev team; rsalz at openssl.org<mailto:rsalz at openssl.org>

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