3.8.2 build failure on old Mac

[robmaz]

3.8.2 fails to build with default config on a MacPro (Early 2009) with MacOS 10.11.6 and compiler version

$ as --version
Apple LLVM version 8.0.0 (clang-800.0.42.1)
Target: x86_64-apple-darwin15.6.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin

$ ./configure && make
...
Making all in crypto
echo "generating crypto_portable.sym ..."
generating crypto_portable.sym ...
cp ../crypto/crypto.sym crypto_portable.sym
chmod u+w crypto_portable.sym
/Library/Developer/CommandLineTools/usr/bin/make all-am
CPPAS aes/libcrypto_la-aes-macosx-x86_64.lo
CPPAS aes/libcrypto_la-bsaes-macosx-x86_64.lo
CPPAS aes/libcrypto_la-vpaes-macosx-x86_64.lo
CPPAS aes/libcrypto_la-aesni-macosx-x86_64.lo
aes/aesni-macosx-x86_64.S:890:2: error: invalid instruction mnemonic 'endbr64'
endbr64
^~~~~~~
make[2]: *** [aes/libcrypto_la-aesni-macosx-x86_64.lo] Error 1
make[1]: *** [all] Error 2
make: *** [all-recursive] Error 1

Looks like it is trying to compile an assembler file it shouldn't for this system?

Libressl versions up to 3.7.3 build fine, so this is a regression.

[busterb]

Hi, this was reported in some other tickets as well; we'll have it addressed in the next release.

[busterb]

Duplicate of #933