Merge pull request #6208 from lembacon/xcode-11.0

xcode: add initial support for Xcode 11.0

Library/Homebrew/os/mac.rb

@@ -37,7 +37,7 @@ module OS
 
     def latest_sdk_version
       # TODO: bump version when new Xcode macOS SDK is released
-      Version.new "10.14"
+      Version.new "10.15"
     end
 
     def latest_stable_version
@@ -208,6 +208,7 @@ module OS
       "10.1"   => { clang: "10.0", clang_build: 1000 },
       "10.2"   => { clang: "10.0", clang_build: 1001 },
       "10.2.1" => { clang: "10.0", clang_build: 1001 },
+      "11.0"   => { clang: "11.0", clang_build: 1100 },
     }.freeze
 
     def compilers_standard?

Library/Homebrew/os/mac/xcode.rb

@@ -17,16 +17,18 @@ module OS
         when "10.12" then "9.2"
         when "10.13" then "10.1"
         when "10.14" then "10.2.1"
+        when "10.15" then "11.0"
         else
           raise "macOS '#{MacOS.version}' is invalid" unless OS::Mac.prerelease?
 
           # Default to newest known version of Xcode for unreleased macOS versions.
-          "10.2.1"
+          "11.0"
         end
       end
 
       def minimum_version
         case MacOS.version
+        when "10.15" then "11.0"
         when "10.14" then "10.2"
         when "10.13" then "9.0"
         when "10.12" then "8.0"
@@ -174,7 +176,8 @@ module OS
         when 90      then "9.2"
         when 91      then "9.4"
         when 100     then "10.2.1"
-        else              "10.2.1"
+        when 110     then "11.0"
+        else              "11.0"
         end
       end
 
@@ -242,6 +245,7 @@ module OS
         # on the older supported platform for that Xcode release, i.e there's no
         # CLT package for 10.11 that contains the Clang version from Xcode 8.
         case MacOS.version
+        when "10.15" then "1100.0.20.17"
         when "10.14" then "1001.0.46.4"
         when "10.13" then "1000.10.44.2"
         when "10.12" then "900.0.39.2"
@@ -253,6 +257,7 @@ module OS
 
       def minimum_version
         case MacOS.version
+        when "10.15" then "11.0.0"
         when "10.14" then "10.0.0"
         when "10.13" then "9.0.0"
         when "10.12" then "8.0.0"