more patches

common/optional/x86-64-v3/patches/afdko/check-overlap-font-content.patch

@@ -0,0 +1,19 @@
+Subject: [PATCH] Compare font content in the overlap-removal regression
+
+PFA_SKIP ends with a separator, producing an empty prefix that matches every
+line. Remove the empty prefix for this test so glyph differences are checked,
+and assert that tx exits successfully before inspecting the output.
+
+--- a/tests/tx_test.py
++++ b/tests/tx_test.py
+@@ -1064,6 +1064,8 @@
+     output_path = get_temp_file_path()
+     args = [TOOL, '-t1', '+V', '-o', output_path, input_path]
+-    subprocess.call(args)
+-    assert differ([expected_path, output_path, '-s', PFA_SKIP[0]])
++    subprocess.check_call(args)
++    # An empty skip prefix matches every line and hides font differences.
++    skip_headers = SPLIT_MARKER.join(filter(None, PFA_SKIP[0].split(SPLIT_MARKER)))
++    assert differ([expected_path, output_path, '-s', skip_headers])
+ 
+ 

common/optional/x86-64-v3/patches/afdko/default.nix

@@ -0,0 +1,10 @@
+{ afdko }:
+afdko.overridePythonAttrs (old: {
+  # FMA changes overlap-removal coordinates by 0.01 units on x86-64-v3.
+  # Separate multiply/add rounding reproduces the reference Type 1 font exactly.
+  env = (old.env or { }) // {
+    NIX_CFLAGS_COMPILE = (old.env.NIX_CFLAGS_COMPILE or "") + " -ffp-contract=off";
+  };
+
+  patches = (old.patches or [ ]) ++ [ ./check-overlap-font-content.patch ];
+})