1 files changed, 124 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/compilers/open-watcom/v2.nix b/nixpkgs/pkgs/development/compilers/open-watcom/v2.nix
new file mode 100644
index 000000000000..6cb5c6dcc105
--- /dev/null
+++ b/nixpkgs/pkgs/development/compilers/open-watcom/v2.nix
@@ -0,0 +1,124 @@
+{ stdenv
+, lib
+, fetchFromGitHub
+, unstableGitUpdater
+
+# Docs cause an immense increase in build time, up to 2 additional hours
+, withDocs ? false
+, dosbox
+, ghostscript
+, withGUI ? false
+}:
+
+stdenv.mkDerivation rec {
+  pname = "open-watcom-v2";
+  version = "unstable-2021-12-10";
+  name = "${pname}-unwrapped-${version}";
+
+  src = fetchFromGitHub {
+    owner = "open-watcom";
+    repo = "open-watcom-v2";
+    rev = "ca685c1b780149f7210426f0bb78dd7b67b19e6d";
+    sha256 = "1nmmj94z5hips2426rcdqdcsm8015jjj51rm9fnx81qagdj52j5d";
+  };
+
+  postPatch = ''
+    patchShebangs *.sh
+
+    for dateSource in cmnvars.sh bld/wipfc/configure; do
+      substituteInPlace $dateSource \
+        --replace '`date ' '`date -ud "@$SOURCE_DATE_EPOCH" '
+    done
+
+    substituteInPlace bld/watcom/h/banner.h \
+      --replace '__DATE__' "\"$(date -ud "@$SOURCE_DATE_EPOCH" +'%b %d %Y')\"" \
+      --replace '__TIME__' "\"$(date -ud "@$SOURCE_DATE_EPOCH" +'%T')\""
+
+    substituteInPlace build/makeinit \
+      --replace '%__CYEAR__' '%OWCYEAR'
+  '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
+    substituteInPlace build/mif/local.mif \
+      --replace '-static' ""
+  '';
+
+  nativeBuildInputs = [ ]
+    ++ lib.optional (withDocs || withGUI) dosbox
+    ++ lib.optional withDocs ghostscript;
+
+  configurePhase = ''
+    runHook preConfigure
+
+    export OWROOT=$(realpath $PWD)
+    export OWTOOLS=${if stdenv.cc.isClang then "CLANG" else "GCC"}
+    export OWDOCBUILD=${if withDocs then "1" else "0"}
+    export OWGHOSTSCRIPTPATH=${lib.optionalString withDocs "${ghostscript}/bin"}
+    export OWGUINOBUILD=${if withGUI then "0" else "1"}
+    export OWNOBUILD=
+    export OWDISTRBUILD=0
+    export OWDOSBOX=${lib.optionalString (withDocs || withGUI) "${dosbox}/bin/dosbox"}
+    export OWVERBOSE=0
+    export OWRELROOT=$out
+
+    source cmnvars.sh
+
+    runHook postConfigure
+  '';
+
+  buildPhase = ''
+    runHook preBuild
+
+    ./build.sh build
+
+    runHook postBuild
+  '';
+
+  installPhase = ''
+    runHook preInstall
+
+    ./build.sh cprel
+
+    runHook postInstall
+  '';
+
+  # Stripping breaks many tools
+  dontStrip = true;
+
+  passthru.updateScript = unstableGitUpdater {
+    url = "https://github.com/open-watcom/open-watcom-v2.git";
+  };
+
+  meta = with lib; {
+    description = "The v2 fork of the Open Watcom suite of compilers and tools";
+    longDescription = ''
+      A fork of Open Watcom: A C/C++/Fortran compiler and assembler suite
+      targeting a multitude of architectures (x86, IA-32, Alpha AXP, MIPS,
+      PowerPC) and operating systems (DOS, OS/2, Windows, Linux).
+
+      Main differences from Open Watcom 1.9:
+
+      - New two-phase build system - Open Watcom can be built by the host's
+        native C/C++ compiler or by itself
+      - Code generator properly initializes pointers by DLL symbol addresses
+      - DOS tools now support long file names (LFN) if appropriate LFN driver
+        is loaded by DOS
+      - Open Watcom is ported to 64-bit hosts (Win64, Linux x64)
+      - Librarian supports x64 CPU object modules and libraries
+      - RDOS 32-bit C run-time compact memory model libraries are fixed
+      - Resource compiler and Resource editors support Win64 executables
+      - Open Watcom text editor is now self-contained, it can be used as
+        standalone tool without any requirements for any additional files or
+        configuration
+      - Broken C++ compiler pre-compiled header template support is fixed
+      - Many C++ compiler crashes are fixed
+      - Debugger has no length limit for any used environment variable
+    '' + lib.optionalString (!withDocs) ''
+
+      The documentation has been excluded from this build for build time reasons. It can be found here:
+      https://github.com/open-watcom/open-watcom-v2/wiki/Open-Watcom-Documentation
+    '';
+    homepage = "https://open-watcom.github.io";
+    license = licenses.watcom;
+    platforms = [ "x86_64-linux" "i686-linux" "x86_64-darwin" "x86_64-windows" "i686-windows" ];
+    maintainers = with maintainers; [ OPNA2608 ];
+  };
+}