Release 2.9.6.3

_posts/releases/2026-03-15-v2.9.6.3.md

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+---
+layout: post
+version: 2.9.6.3
+categories:
+- releases
+packages:
+  linux64: bnfc-2.9.6.3-linux-x86_64.binary
+  mac: bnfc-2.9.6.3-mac.pkg
+  source: BNFC-2.9.6.3.tar.gz
+  win: bnfc-2.9.6.3-win.exe
+---
+
+* C++: fixing a regression introduced in 2.9.6.2
+  - `std::to_string` is not compatible to `--ansi` standard
+    [[#534](https://github.com/BNFC/bnfc/issues/534)]
+* Pygments: fix escaping of non-alphanumeric characters in python regexes
+  [[#547](https://github.com/BNFC/bnfc/pull/547)]
+* Agda: the generated `Makefile` now accepts variable `AGDA_OPTS`
+  [[#544](https://github.com/BNFC/bnfc/pull/544)]
+
+Builds with GHC versions:
+* with `cabal`, GHC 8.0 - 9.12
+* with `stack`, GHC 8.4 - 9.12