Fix installing Ruby with LibreSSL and MacPorts (Issue #4208) (#4209)

CHANGELOG.md

@@ -24,6 +24,7 @@
 * Require make for JRuby 9 [\#4058](https://github.com/rvm/rvm/issues/4058)
 * Fix support for zsh 5.4.1 [bash_zsh_support \#6](https://github.com/mpapis/bash_zsh_support/pull/6)
 * Installing rbx-3.70 fails on PCLinuxOS 64-bit [\#3895](https://github.com/rvm/rvm/issues/3895)  
+* Can't install Ruby with MacPorts and LibreSSL [\#4208](https://github.com/rvm/rvm/issues/4208)
 
 #### Upgraded Ruby interpreters:
 * Add support for Ruby 2.2.8, 2.3.5 and 2.4.2 [\#4159](https://github.com/rvm/rvm/pull/4159)

scripts/functions/requirements/osx_port

@@ -58,12 +58,14 @@ requirements_osx_port_before()
 requirements_osx_port_libs_default()
 {
   port_libs=(
-    autoconf automake libtool pkgconfig
+    autoconf automake gdbm libffi libiconv libksba libtool libyaml pkgconfig readline sqlite3 zlib
   )
+
   case "$1" in
     (*-head) __rvm_which git >/dev/null || port_libs+=( git )
       ;;
   esac
+
   __rvm_selected_compiler >/dev/null ||
   case "$1" in
     (ruby-1*|ree*)
@@ -77,9 +79,15 @@ requirements_osx_port_libs_default()
       fi
       ;;
   esac
-  port_libs+=(
-    libiconv libyaml libffi readline libksba openssl sqlite3 zlib gdbm
-  )
+
+  # LibreSSL is a fork of OpenSSL and is interchangable
+  # If it is installed, then don't worry about OpenSSL
+  if
+    ! requirements_osx_port_lib_installed libressl
+  then
+    port_libs+=( openssl )
+  fi
+
   if
     requirements_osx_port_lib_installed ncursesw
   then
@@ -90,6 +98,7 @@ Error! ncursesw was replaced by ncurses a long time ago, please uninstall 'ncurs
   else
     port_libs+=( ncurses  )
   fi
+
   requirements_check_fallback curl-ca-bundle certsync || return $?
   requirements_check "${port_libs[@]}" || return $?
 }