liblinear: init at 2.20 (#44178)

Since building liblinear is very similar to libsvm, this expression
is largely based on libsvm.

pkgs/development/libraries/liblinear/default.nix

@@ -0,0 +1,39 @@
+{stdenv, fetchurl}:
+
+stdenv.mkDerivation rec {
+  name = "liblinear-${version}";
+  version = "2.20";
+
+  src = fetchurl {
+    url = "https://www.csie.ntu.edu.tw/~cjlin/liblinear/liblinear-${version}.tar.gz";
+    sha256 = "13q48azqy9pd8jyhk0c2hzj5xav1snbdrj8pp38vwrv2wwhfz7rz";
+  };
+
+  buildPhase = ''
+    make
+    make lib
+  '';
+
+  installPhase = let
+    libSuff = stdenv.hostPlatform.extensions.sharedLibrary;
+  in ''
+    mkdir -p $out/lib $out/bin $out/include
+    cp liblinear.so.3 $out/lib/liblinear.3${libSuff}
+    ln -s $out/lib/liblinear.3${libSuff} $out/lib/liblinear${libSuff}
+    cp train $out/bin/liblinear-train
+    cp predict $out/bin/liblinear-predict
+    cp linear.h $out/include
+  '';
+
+  postFixup = stdenv.lib.optionalString stdenv.isDarwin ''
+    install_name_tool -id liblinear.3.dylib $out/lib/liblinear.3.dylib
+  '';
+
+  meta = with stdenv.lib; {
+    description = "A library for large linear classification";
+    homepage = https://www.csie.ntu.edu.tw/~cjlin/liblinear/;
+    license = licenses.bsd3;
+    maintainers = [ maintainers.danieldk ];
+    platforms = platforms.unix;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -10499,6 +10499,8 @@ with pkgs;
 
   libksi = callPackage ../development/libraries/libksi { };
 
+  liblinear = callPackage ../development/libraries/liblinear { };
+
   libmad = callPackage ../development/libraries/libmad { };
 
   libmatchbox = callPackage ../development/libraries/libmatchbox { };