exprtk: init at unstable-2021-12-31

pkgs/development/libraries/exprtk/default.nix

@@ -0,0 +1,28 @@
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation {
+  pname = "exprtk";
+  version = "unstable-2021-12-31";
+
+  src = fetchFromGitHub {
+    owner = "ArashPartow";
+    repo = "exprtk";
+    rev = "806c519c91fd08ba4fa19380dbf3f6e42de9e2d1";
+    hash = "sha256-5/k+y3gNJeggfwXmtAVqmaiV+BXX+WKtWwZWcQSrQDM=";
+  };
+
+  dontBuild = true;
+
+  installPhase = ''
+    runHook preInstall
+    install -Dm644 exprtk.hpp "$out/include/exprtk.hpp"
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    description = "The C++ Mathematical Expression Toolkit Library";
+    homepage = "https://www.partow.net/programming/exprtk/index.html";
+    license = licenses.mit;
+    maintainers = with maintainers; [ anselmschueler ];
+  };
+}

pkgs/top-level/all-packages.nix

@@ -19363,6 +19363,8 @@ with pkgs;
 
   expat = callPackage ../development/libraries/expat { };
 
+  exprtk = callPackage ../development/libraries/exprtk { };
+
   eventlog = callPackage ../development/libraries/eventlog { };
 
   faac = callPackage ../development/libraries/faac { };