kaldi: fix build (NixOS#412663)

Author: vcunat

pkgs/by-name/ka/kaldi/gcc14.patch

@@ -0,0 +1,24 @@
+From 580bd3f0fea7ddc913329537070ab08fd3bf6033 Mon Sep 17 00:00:00 2001
+From: matthiasdotsh <git@matthias.sh>
+Date: Mon, 26 May 2025 11:22:01 +0200
+Subject: [PATCH] Fix build for gcc >=14
+
+---
+ src/include/fst/fst.h | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/src/include/fst/fst.h b/src/include/fst/fst.h
+index 20e6bb3..2cb1364 100644
+--- a/src/include/fst/fst.h
++++ b/src/include/fst/fst.h
+@@ -652,8 +652,8 @@ class FstImpl {
+   FstImpl &operator=(const FstImpl<Arc> &impl) {
+     properties_ = impl.properties_;
+     type_ = impl.type_;
+-    isymbols_ = impl.isymbols_ ? impl.isymbols_->Copy() : nullptr;
+-    osymbols_ = impl.osymbols_ ? impl.osymbols_->Copy() : nullptr;
++    isymbols_ = impl.isymbols_ ? std::unique_ptr<fst::SymbolTable>(impl.isymbols_->Copy()) : nullptr;
++    osymbols_ = impl.osymbols_ ? std::unique_ptr<fst::SymbolTable>(impl.osymbols_->Copy()) : nullptr;
+     return *this;
+   }
+

pkgs/by-name/ka/kaldi/package.nix

@@ -62,14 +62,18 @@ stdenv.mkDerivation (finalAttrs: {
     cp -r ../egs $out/share/kaldi
   '';
 
+  dontCheckForBrokenSymlinks = true;  #TODO: investigate
+
   passthru = {
     sources = {
       # rev from https://github.com/kaldi-asr/kaldi/blob/master/cmake/third_party/openfst.cmake
       openfst = fetchFromGitHub {
         owner = "kkm000";
         repo = "openfst";
         rev = "338225416178ac36b8002d70387f5556e44c8d05";
-        hash = "sha256-MGEUuw7ex+WcujVdxpO2Bf5sB6Z0edcAeLGqW/Lo1Hs=";
+        hash = "sha256-y1E6bQgBfYt1Co02UutOyEM2FnETuUl144tHwypiX+M=";
+        # https://github.com/kkm000/openfst/issues/59
+        postFetch = ''(cd "$out"; patch -p1 < '${./gcc14.patch}')'';
       };
     };