1 files changed, 27 insertions, 0 deletions
diff --git a/lib/rubygems/ext/cargo_builder/link_flag_converter.rb b/lib/rubygems/ext/cargo_builder/link_flag_converter.rb
new file mode 100644
index 0000000000..e4d196cb10
--- /dev/null
+++ b/lib/rubygems/ext/cargo_builder/link_flag_converter.rb
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+class Gem::Ext::CargoBuilder < Gem::Ext::Builder
+  # Converts Ruby link flags into something cargo understands
+  class LinkFlagConverter
+    FILTERED_PATTERNS = [
+      /compress-debug-sections/, # Not supported by all linkers, and not required for Rust
+    ].freeze
+
+    def self.convert(arg)
+      return [] if FILTERED_PATTERNS.any? {|p| p.match?(arg) }
+
+      case arg.chomp
+      when /^-L\s*(.+)$/
+        ["-L", "native=#{$1}"]
+      when /^--library=(\w+\S+)$/, /^-l\s*(\w+\S+)$/
+        ["-l", $1]
+      when /^-l\s*([^:\s])+/ # -lfoo, but not -l:libfoo.a
+        ["-l", $1]
+      when /^-F\s*(.*)$/
+        ["-l", "framework=#{$1}"]
+      else
+        ["-C", "link-args=#{arg}"]
+      end
+    end
+  end
+end