Add superenv for Linux

Library/Homebrew/build.rb

@@ -68,6 +68,7 @@ class Build
   def install
     formula_deps = deps.map(&:to_formula)
     keg_only_deps = formula_deps.select(&:keg_only?)
+    run_time_deps = deps.reject(&:build?).map(&:to_formula)
 
     formula_deps.each do |dep|
       fixopt(dep) unless dep.opt_prefix.directory?
@@ -78,6 +79,7 @@ class Build
     if superenv?
       ENV.keg_only_deps = keg_only_deps
       ENV.deps = formula_deps
+      ENV.run_time_deps = run_time_deps
       ENV.x11 = reqs.any? { |rq| rq.is_a?(X11Requirement) }
       ENV.setup_build_environment(formula)
       post_superenv_hacks

Library/Homebrew/extend/ENV/super.rb

@@ -15,12 +15,13 @@ module Superenv
   include SharedEnvExtension
 
   # @private
-  attr_accessor :keg_only_deps, :deps
+  attr_accessor :keg_only_deps, :deps, :run_time_deps
   attr_accessor :x11
 
   def self.extended(base)
     base.keg_only_deps = []
     base.deps = []
+    base.run_time_deps = []
   end
 
   # @private
@@ -61,6 +62,8 @@ module Superenv
     self["HOMEBREW_ISYSTEM_PATHS"] = determine_isystem_paths
     self["HOMEBREW_INCLUDE_PATHS"] = determine_include_paths
     self["HOMEBREW_LIBRARY_PATHS"] = determine_library_paths
+    self["HOMEBREW_RPATH_PATHS"] = determine_rpath_paths(formula)
+    self["HOMEBREW_DYNAMIC_LINKER"] = determine_dynamic_linker_path
     self["HOMEBREW_DEPENDENCIES"] = determine_dependencies
     self["HOMEBREW_FORMULA_PREFIX"] = formula.prefix unless formula.nil?
 
@@ -178,20 +181,22 @@ module Superenv
       keg_only_deps.map(&:opt_lib),
       HOMEBREW_PREFIX/"lib",
     ]
-
-    if compiler == :llvm_clang
-      if MacOS::CLT.installed?
-        paths << "/usr/lib"
-      else
-        paths << "#{MacOS.sdk_path}/usr/lib"
-      end
-      paths << Formula["llvm"].opt_lib.to_s
-    end
-
     paths += homebrew_extra_library_paths
     PATH.new(paths).existing
   end
 
+  def determine_extra_rpath_paths(_formula)
+    []
+  end
+
+  def determine_rpath_paths(formula)
+    PATH.new(determine_extra_rpath_paths(formula))
+  end
+
+  def determine_dynamic_linker_path
+    nil
+  end
+
   def determine_dependencies
     deps.map(&:name).join(",")
   end

Library/Homebrew/extend/os/extend/ENV/super.rb

@@ -1 +1,5 @@
-require "extend/os/mac/extend/ENV/super" if OS.mac?
+if OS.mac?
+  require "extend/os/mac/extend/ENV/super"
+elsif OS.linux?
+  require "extend/os/linux/extend/ENV/super"
+end

Library/Homebrew/extend/os/linux/extend/ENV/super.rb

@@ -0,0 +1,33 @@
+module Superenv
+  # @private
+  def self.bin
+    (HOMEBREW_SHIMS_PATH/"linux/super").realpath
+  end
+
+  def homebrew_extra_paths
+    paths = []
+    paths += %w[binutils make].map do |f|
+      begin
+        bin = Formula[f].opt_bin
+        bin if bin.directory?
+      rescue FormulaUnavailableError
+        nil
+      end
+    end.compact
+    paths
+  end
+
+  def determine_extra_rpath_paths(formula)
+    PATH.new(
+      formula&.lib,
+      "#{HOMEBREW_PREFIX}/lib",
+      PATH.new(run_time_deps.map { |dep| dep.opt_lib.to_s }).existing,
+    )
+  end
+
+  def determine_dynamic_linker_path
+    path = "#{HOMEBREW_PREFIX}/lib/ld.so"
+    return unless File.readable? path
+    path
+  end
+end

Library/Homebrew/extend/os/mac/extend/ENV/super.rb

@@ -58,6 +58,14 @@ module Superenv
 
   def homebrew_extra_library_paths
     paths = []
+    if compiler == :llvm_clang
+      if MacOS::CLT.installed?
+        paths << "/usr/lib"
+      else
+        paths << "#{MacOS.sdk_path}/usr/lib"
+      end
+      paths << Formula["llvm"].opt_lib.to_s
+    end
     paths << MacOS::X11.lib.to_s if x11?
     paths << "#{effective_sysroot}/System/Library/Frameworks/OpenGL.framework/Versions/Current/Libraries"
     paths