Lab 2 Part 2

JessicaLiu/Lab2/Lab2Part2/default.nix

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+{ stdenv, cmake, helloworld_lib }:
+
+stdenv.mkDerivation rec {
+  pname = "hello_world";
+  version = "0.1.0";
+  src = ./helloapp;
+  nativeBuildInputs = [ cmake ];
+  buildInputs = [ helloworld_lib ];
+}

JessicaLiu/Lab2/Lab2Part2/flake.nix

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+{
+    description = "Lab 02 Part 2 Flake";
+
+    inputs = {
+        nixpkgs.url = "github:NixOS/nixpkgs";
+        utils.url = "github:numtide/flake-utils";
+    };
+
+    outputs = { self, nixpkgs, utils }:
+        let
+            helloworld_overlay = final: prev: rec {
+                helloworld_lib = final.callPackage ./hellolib.nix { };
+                helloworld = final.callPackage ./default.nix {
+                    inherit helloworld_lib;
+                };
+            };
+
+            my_overlays = [ helloworld_overlay ];
+
+            pkgs = import nixpkgs {
+                system = "x86_64-linux";
+                overlays = [ self.overlays.default ];
+            };
+
+            in {
+                packages.x86_64-linux.default = pkgs.helloworld;
+                overlays.default = nixpkgs.lib.composeManyExtensions my_overlays;
+            };
+}

JessicaLiu/Lab2/Lab2Part2/helloapp/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.15...3.30)
+
+project(helloapp VERSION 1.0
+                          DESCRIPTION "HyTech Software Training Lab 2 Part 2"
+                          LANGUAGES CXX)
+
+find_package(helloworld_lib REQUIRED)
+
+# creates a target executable file
+# helloworld is the name of the executable file that will be generated
+# main.cpp is the relative path to a source file
+add_executable(helloworld main.cpp)
+target_link_libraries(helloworld PUBLIC helloworld_lib::helloworld_lib)
+
+install(TARGETS helloworld RUNTIME DESTINATION bin)

JessicaLiu/Lab2/Lab2Part2/helloapp/main.cpp

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+#include "hello.h"
+
+int main() {
+    Hello h;
+    h.hello_world();
+    return 0;
+}

JessicaLiu/Lab2/Lab2Part2/helloapp/result

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+/nix/store/pkcy89nw9nk895xv2rn2n3ynb724jg2p-hello_world-0.1.0

JessicaLiu/Lab2/Lab2Part2/hellolib.nix

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+{ stdenv, cmake }:
+
+stdenv.mkDerivation rec {
+  pname = "hello_world";
+  version = "0.1.0";
+  src = ./hellolib;
+  nativeBuildInputs = [ cmake ];
+}

JessicaLiu/Lab2/Lab2Part2/hellolib/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.15...3.30)
+
+project(Lab2 VERSION 1.0
+                          DESCRIPTION "HyTech Software Training Lab 2"
+                          LANGUAGES CXX)
+
+add_library(helloworld_lib SHARED src/hello.cpp)
+
+target_include_directories(helloworld_lib PUBLIC 
+  $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  $<INSTALL_INTERFACE:include>
+)
+
+include(GNUInstallDirs)
+
+install(TARGETS helloworld_lib
+  EXPORT helloworld_libTargets
+  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+  PUBLIC_HEADER DESTINATION include
+)
+
+# NAMESPACE sets the namespace that your target will live within.
+# you can have multiple targets under the same namespace
+install(EXPORT helloworld_libTargets
+  FILE helloworld_libTargets.cmake
+  NAMESPACE helloworld_lib::  
+  DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/helloworld_lib
+)
+
+# this looks for your .cmake.in file that you created in step 1.
+# if you set the directory differently you may need to handle this differently
+include(CMakePackageConfigHelpers)
+configure_package_config_file(${CMAKE_CURRENT_LIST_DIR}/cmake/helloworld_libConfig.cmake.in
+  "${CMAKE_CURRENT_BINARY_DIR}/helloworld_libConfig.cmake"
+  INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/helloworld_lib
+)
+
+install(FILES
+  "${CMAKE_CURRENT_BINARY_DIR}/helloworld_libConfig.cmake"
+  DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/helloworld_lib
+)
+
+# actually install your header files
+install(
+    DIRECTORY include/
+    DESTINATION ${CMAKE_INSTALL_PREFIX}/include
+    FILES_MATCHING PATTERN "*.h*"
+    )

JessicaLiu/Lab2/Lab2Part2/hellolib/cmake/helloworld_libConfig.cmake.in

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+@PACKAGE_INIT@
+
+# if you have find_package calls, use find_dependency() here with the package
+# that you need to find_package() for. this handles transitive dep finding so
+# your downstream cmake doesnt have to `find_package()` it instead gets done
+# upon package configuration
+
+include("${CMAKE_CURRENT_LIST_DIR}/helloworld_libTargets.cmake")
+
+check_required_components(helloworld_lib)

JessicaLiu/Lab2/Lab2Part2/hellolib/include/hello.h

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+#ifndef _HELLO_H_
+#define _HELLO_H_
+
+class Hello {
+    public:
+        void hello_world();
+};
+
+#endif

JessicaLiu/Lab2/Lab2Part2/hellolib/result

@@ -0,0 +1 @@
+/nix/store/pkcy89nw9nk895xv2rn2n3ynb724jg2p-hello_world-0.1.0

JessicaLiu/Lab2/Lab2Part2/hellolib/src/hello.cpp

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+#include<iostream>
+#include "hello.h"
+
+void Hello::hello_world() {
+    std::cout << "Hello, World!" << std::endl;
+}