tinyfugue: fix build with gcc15; migrate to pcre2 (#513009)

pkgs/by-name/ti/tinyfugue/package.nix

@@ -2,7 +2,9 @@
   lib,
   stdenv,
   fetchurl,
+  fetchpatch,
   ncurses,
+  pcre2,
   zlib,
   openssl,
   sslSupport ? true,
@@ -31,12 +33,30 @@ stdenv.mkDerivation rec {
 
   patches = [
     ./fix-build.patch
+    (fetchpatch {
+      url = "https://src.fedoraproject.org/rpms/tinyfugue/raw/ce016e8fb60a51de7c9d0c45dad109b3809de048/f/tinyfigue-configure-c99.patch";
+      hash = "sha256-Ge6545PCgcvnSgtDChqUQgf6b3BMjNveBAxQ8fAy8f4=";
+    })
+    (fetchpatch {
+      url = "https://src.fedoraproject.org/rpms/tinyfugue/raw/ce016e8fb60a51de7c9d0c45dad109b3809de048/f/tf-50b8.pcre.patch";
+      hash = "sha256-T0XiadrviyuvtZZKYG/kXHQSC7RZkLKQGHOMrnfyLVg=";
+    })
+    (fetchpatch {
+      url = "https://src.fedoraproject.org/rpms/tinyfugue/raw/ce016e8fb60a51de7c9d0c45dad109b3809de048/f/tf-50b8-pcre2.patch";
+      hash = "sha256-pTtCUwMBk+t4lK0Z1fKPKaQemdpEdVPe2NScpD8QBS8=";
+    })
   ];
 
+  postPatch = ''
+    # remove bundled old PCRE
+    rm -rv src/pcre-2.08
+  '';
+
   configureFlags = optional (!sslSupport) "--disable-ssl";
 
   buildInputs = [
     ncurses
+    pcre2
     zlib
   ]
   ++ optional sslSupport openssl;
@@ -45,7 +65,7 @@ stdenv.mkDerivation rec {
   # gcc-10. Otherwise build fails as:
   #   ld: world.o:/build/tf-50b8/src/socket.h:24: multiple definition of
   #     `world_decl'; command.o:/build/tf-50b8/src/socket.h:24: first defined here
-  env.NIX_CFLAGS_COMPILE = "-fcommon";
+  env.NIX_CFLAGS_COMPILE = "-fcommon -Wno-incompatible-pointer-types -Wno-return-mismatch";
 
   meta = {
     homepage = "https://tinyfugue.sourceforge.net/";