Add optional path specification to libssh.h, and instruction to use brew (for Mac)

[guoquan]

Hence Mac is supported

[ericcurtin]

Apple silicon support next? Hopefully it will just build :smile:

[studgeek]

It looks like this was approved, but not merged?

[ericcurtin]

I actually just got a M1 Mac Mini for some aarch64 work I'm doing, might give this branch a whirl to see if it's still working today.

[wongjustin99]

Location is slightly different for me on an M1 using the same brew package.

LIBSSH_INCLUDE2 = /opt/homebrew/Cellar/libssh/0.9.6/include/libssh/libssh.h

Still working through it though, the includes in src/sshping.cos are not picking up the updated header path it seems.

[wongjustin99]

Using https://github.com/spook/sshping/pull/27, I was able to get running as well.

[code-ape]

Just tried this after merge and still having issues. I'm on an M1 MacBook Pro running the following, any suggestions?

brew install libssh
make -e LIBSSH_INCLUDE=/opt/homebrew/Cellar/libssh/0.10.4/include/libssh/libssh.h

Output is:

g++ -Wall -I ext/ -o bin/sshping src/sshping.cxx -lssh
src/sshping.cxx:38:10: fatal error: 'libssh/libssh.h' file not found
#include <libssh/libssh.h>
         ^~~~~~~~~~~~~~~~~
1 error generated.
make: *** [bin/sshping] Error 1