julia: test arm64 linux

Author: cho-m

Formula/j/julia.rb

@@ -111,7 +111,7 @@ def install
                         haswell,-rdrnd,base(1)
                         x86-64-v4,-rdrnd,base(1)]
     end
-    args << "JULIA_CPU_TARGET=#{cpu_targets.join(";")}"
+    args << "JULIA_CPU_TARGET=#{cpu_targets.join(";")}" if !OS.linux? || !Hardware::CPU.arm?
     user = begin
       tap.user
     rescue
@@ -152,6 +152,31 @@ def install
 
     system "make", *args, "install"
 
+    # FIXME: TESTING
+    if OS.linux? && Hardware::CPU.arm?
+      ohai "Getting elf files"
+      # test detect_cxx_stdlibs
+      hardlinks = Set.new
+      elf_files = []
+      prefix.find do |pn|
+        next if pn.symlink? || pn.directory?
+
+        ohai "Checking #{pn} dylib?"
+        dylib = pn.dylib?
+        ohai "Checking #{pn} binary_executable?"
+        binary_executable = pn.binary_executable?
+        next if !dylib && !binary_executable
+
+        # If we've already processed a file, ignore its hardlinks (which have the
+        # same dev ID and inode). This prevents relocations from being performed
+        # on a binary more than once.
+        next unless hardlinks.add? [pn.stat.dev, pn.stat.ino]
+
+        elf_files << pn
+      end
+      return
+    end
+
     if OS.linux?
       # Replace symlinks referencing Cellar paths with ones using opt paths
       deps.reject(&:build?).map(&:to_formula).map(&:opt_lib).each do |libdir|