Merge pull request #1546 from MikeMcQuaid/llvm-clang-fixes

LLVM Clang fixes

Library/Homebrew/development_tools.rb

@@ -42,7 +42,7 @@ class DevelopmentTools
     end
 
     def gcc_40_build_version
-      @gcc_40_build_version ||=
+      @gcc_40_build_version ||= begin
         if (path = locate("gcc-4.0")) &&
            build_version = `#{path} --version 2>/dev/null`[/build (\d{4,})/, 1]
           Version.new build_version
@@ -50,11 +50,11 @@ class DevelopmentTools
           Version::NULL
         end
       end
+    end
     alias gcc_4_0_build_version gcc_40_build_version
 
     def gcc_42_build_version
-      @gcc_42_build_version ||=
+      @gcc_42_build_version ||= begin
-        begin
         gcc = locate("gcc-4.2") || HOMEBREW_PREFIX.join("opt/apple-gcc42/bin/gcc-4.2")
         if gcc.exist? && !gcc.realpath.basename.to_s.start_with?("llvm")&&
            build_version = `#{gcc} --version 2>/dev/null`[/build (\d{4,})/, 1]
@@ -67,7 +67,7 @@ class DevelopmentTools
     alias gcc_build_version gcc_42_build_version
 
     def clang_version
-      @clang_version ||=
+      @clang_version ||= begin
         if (path = locate("clang")) &&
            build_version = `#{path} --version`[/(?:clang|LLVM) version (\d\.\d)/, 1]
           Version.new build_version
@@ -75,9 +75,10 @@ class DevelopmentTools
           Version::NULL
         end
       end
+    end
 
     def clang_build_version
-      @clang_build_version ||=
+      @clang_build_version ||= begin
         if (path = locate("clang")) &&
            build_version = `#{path} --version`[/clang-(\d{2,})/, 1]
           Version.new build_version
@@ -85,11 +86,17 @@ class DevelopmentTools
           Version::NULL
         end
       end
+    end
 
     def llvm_clang_build_version
-      @llvm_clang_build_version ||= if Tab.for_name "llvm"
+      @llvm_clang_build_version ||= begin
         path = Formulary.factory("llvm").opt_prefix/"bin/clang"
-        `#{path} --version`[/clang version (\d\.\d\.\d)/, 1]
+        if path.executable? &&
+           build_version = `#{path} --version`[/clang version (\d\.\d\.\d)/, 1]
+          Version.new build_version
+        else
+          Version::NULL
+        end
       end
     end
 

Library/Homebrew/shims/super/cc

@@ -156,7 +156,7 @@ class Cmd
       /^-O[0-9zs]?$/, "-fast", "-no-cpp-precomp",
       "-pedantic", "-pedantic-errors", "-Wno-long-double",
       "-Wno-unused-but-set-variable"
-    when "-mno-fused-madd", "-fforce-addr", "-fno-defer-pop",
+    when "-fopenmp", "-lgomp", "-mno-fused-madd", "-fforce-addr", "-fno-defer-pop",
       "-mno-dynamic-no-pic", "-fearly-inlining", /^-f(?:no-)?inline-functions-called-once/,
       /^-finline-limit/, /^-f(?:no-)?check-new/, "-fno-delete-null-pointer-checks",
       "-fcaller-saves", "-fthread-jumps", "-fno-reorder-blocks", "-fcse-skip-blocks",
@@ -165,8 +165,6 @@ class Cmd
       "-fuse-linker-plugin", "-frounding-math"
       # clang doesn't support these flags
       args << arg unless tool =~ /^clang/
-    when "-fopenmp", "-lgomp"
-      args << arg if tool =~ /^llvm_clang/
     when "--fast-math"
       arg = "-ffast-math" if tool =~ /^clang/
       args << arg

Library/Homebrew/version/null.rb

@@ -34,5 +34,9 @@ class Version
       ""
     end
     alias_method :to_str, :to_s
+
+    def inspect
+      "#<Version::NULL>".freeze
+    end
   end.new
 end