Somewhere between release/5.0 and master there was a change that caused the System.Native static libraries (.a) for Linux/Mac to no longer make it into the runtime pack:
5.0:
$ ls -la 5.0.0-rc.2.20475.5/runtimes/linux-x64/native/libSystem*
-rwxr--r-- 1 alexander staff 3671090 Sep 25 21:07 5.0.0-rc.2.20475.5/runtimes/linux-x64/native/libSystem.IO.Compression.Native.a
-rwxr--r-- 1 alexander staff 907640 Sep 25 21:07 5.0.0-rc.2.20475.5/runtimes/linux-x64/native/libSystem.IO.Compression.Native.so
-rwxr--r-- 1 alexander staff 426726 Sep 25 21:07 5.0.0-rc.2.20475.5/runtimes/linux-x64/native/libSystem.Native.a
-rwxr--r-- 1 alexander staff 75960 Sep 25 21:07 5.0.0-rc.2.20475.5/runtimes/linux-x64/native/libSystem.Native.so
-rwxr--r-- 1 alexander staff 36752 Sep 25 21:07 5.0.0-rc.2.20475.5/runtimes/linux-x64/native/libSystem.Net.Security.Native.a
-rwxr--r-- 1 alexander staff 14536 Sep 25 21:07 5.0.0-rc.2.20475.5/runtimes/linux-x64/native/libSystem.Net.Security.Native.so
-rwxr--r-- 1 alexander staff 997210 Sep 25 21:07 5.0.0-rc.2.20475.5/runtimes/linux-x64/native/libSystem.Security.Cryptography.Native.OpenSsl.a
-rwxr--r-- 1 alexander staff 129224 Sep 25 21:07 5.0.0-rc.2.20475.5/runtimes/linux-x64/native/libSystem.Security.Cryptography.Native.OpenSsl.so
6.0:
$ ls -la 6.0.0-alpha.1.20527.8/runtimes/linux-x64/native/libSystem*
-rwxr--r-- 1 alexander staff 60712 Oct 28 00:05 6.0.0-alpha.1.20527.8/runtimes/linux-x64/native/libSystem.Globalization.Native.so
-rwxr--r-- 1 alexander staff 907640 Oct 28 00:05 6.0.0-alpha.1.20527.8/runtimes/linux-x64/native/libSystem.IO.Compression.Native.so
-rwxr--r-- 1 alexander staff 75960 Oct 28 00:05 6.0.0-alpha.1.20527.8/runtimes/linux-x64/native/libSystem.Native.so
-rwxr--r-- 1 alexander staff 14536 Oct 28 00:05 6.0.0-alpha.1.20527.8/runtimes/linux-x64/native/libSystem.Net.Security.Native.so
-rwxr--r-- 1 alexander staff 129224 Oct 28 00:05 6.0.0-alpha.1.20527.8/runtimes/linux-x64/native/libSystem.Security.Cryptography.Native.OpenSsl.so
Somewhere between release/5.0 and master there was a change that caused the System.Native static libraries (.a) for Linux/Mac to no longer make it into the runtime pack:
5.0:
$ ls -la 5.0.0-rc.2.20475.5/runtimes/linux-x64/native/libSystem* -rwxr--r-- 1 alexander staff 3671090 Sep 25 21:07 5.0.0-rc.2.20475.5/runtimes/linux-x64/native/libSystem.IO.Compression.Native.a -rwxr--r-- 1 alexander staff 907640 Sep 25 21:07 5.0.0-rc.2.20475.5/runtimes/linux-x64/native/libSystem.IO.Compression.Native.so -rwxr--r-- 1 alexander staff 426726 Sep 25 21:07 5.0.0-rc.2.20475.5/runtimes/linux-x64/native/libSystem.Native.a -rwxr--r-- 1 alexander staff 75960 Sep 25 21:07 5.0.0-rc.2.20475.5/runtimes/linux-x64/native/libSystem.Native.so -rwxr--r-- 1 alexander staff 36752 Sep 25 21:07 5.0.0-rc.2.20475.5/runtimes/linux-x64/native/libSystem.Net.Security.Native.a -rwxr--r-- 1 alexander staff 14536 Sep 25 21:07 5.0.0-rc.2.20475.5/runtimes/linux-x64/native/libSystem.Net.Security.Native.so -rwxr--r-- 1 alexander staff 997210 Sep 25 21:07 5.0.0-rc.2.20475.5/runtimes/linux-x64/native/libSystem.Security.Cryptography.Native.OpenSsl.a -rwxr--r-- 1 alexander staff 129224 Sep 25 21:07 5.0.0-rc.2.20475.5/runtimes/linux-x64/native/libSystem.Security.Cryptography.Native.OpenSsl.so6.0:
$ ls -la 6.0.0-alpha.1.20527.8/runtimes/linux-x64/native/libSystem* -rwxr--r-- 1 alexander staff 60712 Oct 28 00:05 6.0.0-alpha.1.20527.8/runtimes/linux-x64/native/libSystem.Globalization.Native.so -rwxr--r-- 1 alexander staff 907640 Oct 28 00:05 6.0.0-alpha.1.20527.8/runtimes/linux-x64/native/libSystem.IO.Compression.Native.so -rwxr--r-- 1 alexander staff 75960 Oct 28 00:05 6.0.0-alpha.1.20527.8/runtimes/linux-x64/native/libSystem.Native.so -rwxr--r-- 1 alexander staff 14536 Oct 28 00:05 6.0.0-alpha.1.20527.8/runtimes/linux-x64/native/libSystem.Net.Security.Native.so -rwxr--r-- 1 alexander staff 129224 Oct 28 00:05 6.0.0-alpha.1.20527.8/runtimes/linux-x64/native/libSystem.Security.Cryptography.Native.OpenSsl.so