From b674acee6ef4e24dd14f7dc63b380b94c4ccd19d Mon Sep 17 00:00:00 2001
From: Lars Jellema <lars.jellema@gmail.com>
Date: Sun, 2 Jun 2019 23:40:01 +0200
Subject: ghdl: init at 0.37

---
 pkgs/development/compilers/ghdl/default.nix | 40 +++++++++++++++++++++++++++++
 pkgs/top-level/all-packages.nix             | 10 ++++++++
 2 files changed, 50 insertions(+)
 create mode 100644 pkgs/development/compilers/ghdl/default.nix

diff --git a/pkgs/development/compilers/ghdl/default.nix b/pkgs/development/compilers/ghdl/default.nix
new file mode 100644
index 00000000000..6d1fae33734
--- /dev/null
+++ b/pkgs/development/compilers/ghdl/default.nix
@@ -0,0 +1,40 @@
+{ stdenv, fetchFromGitHub, gnat, zlib, llvm, lib
+, backend ? "mcode" }:
+
+assert backend == "mcode" || backend == "llvm";
+
+stdenv.mkDerivation rec {
+  pname = "ghdl-${backend}";
+  version = "0.37";
+
+  src = fetchFromGitHub {
+    owner = "ghdl";
+    repo = "ghdl";
+    rev = "v${version}";
+    sha256 = "0b53yl4im33c1cd4mdyc4ks9cmrpixym17gzchfmplrl22w3l17y";
+  };
+
+  LIBRARY_PATH = "${stdenv.cc.libc}/lib";
+
+  buildInputs = [ gnat zlib ];
+
+  preConfigure = ''
+    # If llvm 7.0 works, 7.x releases should work too.
+    sed -i 's/check_version 7.0/check_version 7/g' configure
+  '';
+
+  configureFlags = lib.optional (backend == "llvm")
+    "--with-llvm-config=${llvm}/bin/llvm-config";
+
+  hardeningDisable = [ "format" ];
+
+  enableParallelBuilding = true;
+
+  meta = with lib; {
+    homepage = "https://github.com/ghdl/ghdl";
+    description = "VHDL 2008/93/87 simulator";
+    maintainers = with maintainers; [ lucus16 ];
+    platforms = platforms.linux;
+    license = licenses.gpl2;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index a869ce066bf..e2c0391d0a3 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -8429,6 +8429,16 @@ in
     profiledCompiler = false;
   });
 
+  ghdl = ghdl-mcode;
+
+  ghdl-mcode = callPackage ../development/compilers/ghdl {
+    backend = "mcode";
+  };
+
+  ghdl-llvm = callPackage ../development/compilers/ghdl {
+    backend = "llvm";
+  };
+
   gcl = callPackage ../development/compilers/gcl {
     gmp = gmp4;
   };
-- 
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