push sheeet

pkgs/development/libraries/isl/0.20.0.nix

@@ -0,0 +1,11 @@
+import ./generic.nix rec {
+  version = "0.20";
+  urls = [
+    "mirror://sourceforge/libisl/isl-${version}.tar.xz"
+    "https://libisl.sourceforge.io/isl-${version}.tar.xz"
+  ];
+  sha256 = "1akpgq0rbqbah5517blg2zlnfvjxfcl9cjrfc75nbcx5p2gnlnd5";
+  configureFlags = [
+    "--with-gcc-arch=generic" # don't guess -march=/mtune=
+  ];
+}

pkgs/development/libraries/isl/0.23.0.nix

@@ -0,0 +1,11 @@
+import ./generic.nix rec {
+  version = "0.23";
+  urls = [
+    "mirror://sourceforge/libisl/isl-${version}.tar.xz"
+    "https://libisl.sourceforge.io/isl-${version}.tar.xz"
+  ];
+  sha256 = "sha256-XvxT767xUTAfTn3eOFa2aBLYFT3t4k+rF2c/gByGmPI=";
+  configureFlags = [
+    "--with-gcc-arch=generic" # don't guess -march=/mtune=
+  ];
+}

pkgs/development/libraries/isl/0.24.0.nix

@@ -0,0 +1,11 @@
+import ./generic.nix rec {
+  version = "0.24";
+  urls = [
+    "mirror://sourceforge/libisl/isl-${version}.tar.xz"
+    "https://libisl.sourceforge.io/isl-${version}.tar.xz"
+  ];
+  sha256 = "1bgbk6n93qqn7w8v21kxf4x6dc3z0ypqrzvgfd46nhagak60ac84";
+  configureFlags = [
+    "--with-gcc-arch=generic" # don't guess -march=/mtune=
+  ];
+}

pkgs/development/libraries/isl/0.27.0.nix

@@ -0,0 +1,11 @@
+import ./generic.nix rec {
+  version = "0.27";
+  urls = [
+    "mirror://sourceforge/libisl/isl-${version}.tar.xz"
+    "https://libisl.sourceforge.io/isl-${version}.tar.xz"
+  ];
+  sha256 = "sha256-bYurtZ57Zy6Mt4cOh08/e4E7bgDmrz+LBPdXmWVkPVw=";
+  configureFlags = [
+    "--with-gcc-arch=generic" # don't guess -march=/mtune=
+  ];
+}

pkgs/development/libraries/isl/generic.nix

@@ -0,0 +1,51 @@
+{
+  version,
+  urls,
+  sha256,
+  configureFlags ? [ ],
+  patches ? [ ],
+}:
+
+{
+  lib,
+  stdenv,
+  fetchurl,
+  gmp,
+  autoreconfHook,
+  buildPackages,
+  updateAutotoolsGnuConfigScriptsHook,
+}:
+
+stdenv.mkDerivation {
+  pname = "isl";
+  inherit version;
+
+  src = fetchurl {
+    inherit urls sha256;
+  };
+
+  inherit patches;
+
+  strictDeps = true;
+  depsBuildBuild = lib.optionals (lib.versionAtLeast version "0.23") [ buildPackages.stdenv.cc ];
+  nativeBuildInputs =
+    lib.optionals (stdenv.hostPlatform.isRiscV && lib.versionOlder version "0.23") [
+      autoreconfHook
+    ]
+    ++ [
+      # needed until config scripts are updated to not use /usr/bin/uname on FreeBSD native
+      updateAutotoolsGnuConfigScriptsHook
+    ];
+  buildInputs = [ gmp ];
+
+  inherit configureFlags;
+
+  enableParallelBuilding = true;
+
+  meta = {
+    homepage = "https://libisl.sourceforge.io/";
+    license = lib.licenses.lgpl21;
+    description = "Library for manipulating sets and relations of integer points bounded by linear constraints";
+    platforms = lib.platforms.all;
+  };
+}