Merge pull request #1130 from aw1621107/allow-brew-llvm-for-openmp

Prefer brewed Clang over gcc-6 for needs :openmp

Library/Homebrew/compilers.rb

@@ -3,9 +3,10 @@ module CompilerConstants
   GNU_GCC_VERSIONS = %w[4.3 4.4 4.5 4.6 4.7 4.8 4.9 5 6 7].freeze
   GNU_GCC_REGEXP = /^gcc-(4\.[3-9]|[5-7])$/
   COMPILER_SYMBOL_MAP = {
-    "gcc-4.0"  => :gcc_4_0,
-    "gcc-4.2"  => :gcc,
-    "clang"    => :clang,
+    "gcc-4.0"    => :gcc_4_0,
+    "gcc-4.2"    => :gcc,
+    "clang"      => :clang,
+    "llvm_clang" => :llvm_clang,
   }.freeze
 
   COMPILERS = COMPILER_SYMBOL_MAP.values +
@@ -86,7 +87,7 @@ class CompilerSelector
   Compiler = Struct.new(:name, :version)
 
   COMPILER_PRIORITY = {
-    clang: [:clang, :gcc, :gnu, :gcc_4_0],
+    clang: [:clang, :gcc, :gnu, :gcc_4_0, :llvm_clang],
     gcc: [:gcc, :gnu, :clang, :gcc_4_0],
     gcc_4_0: [:gcc_4_0, :gcc, :gnu, :clang],
   }.freeze

Library/Homebrew/development_tools.rb

@@ -86,6 +86,13 @@ class DevelopmentTools
         end
     end
 
+    def llvm_clang_build_version
+      @llvm_clang_build_version ||= if Tab.for_name "llvm"
+        path = Formulary.factory("llvm").opt_prefix/"bin/clang"
+        `#{path} --version`[/clang version (\d\.\d\.\d)/, 1]
+      end
+    end
+
     def non_apple_gcc_version(cc)
       (@non_apple_gcc_version ||= {}).fetch(cc) do
         path = HOMEBREW_PREFIX.join("opt", "gcc", "bin", cc)

Library/Homebrew/shims/super/cc

@@ -58,6 +58,8 @@ class Cmd
     @tool ||= case @arg0
     when "ld" then "ld"
     when "cpp" then "cpp"
+    when /llvm_(clang(\+\+)?)/
+     "#{ENV["HOMEBREW_PREFIX"]}/opt/llvm/bin/#{$1}"
     when /\w\+\+(-\d(\.\d)?)?$/
       case ENV["HOMEBREW_CC"]
       when /clang/
@@ -154,7 +156,7 @@ class Cmd
       /^-O[0-9zs]?$/, "-fast", "-no-cpp-precomp",
       "-pedantic", "-pedantic-errors", "-Wno-long-double",
       "-Wno-unused-but-set-variable"
-    when "-fopenmp", "-lgomp", "-mno-fused-madd", "-fforce-addr", "-fno-defer-pop",
+    when "-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",
@@ -163,6 +165,8 @@ 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/shims/super/llvm_clang

+cc
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Library/Homebrew/shims/super/llvm_clang++

+cc
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