The initial version has two independent libraries.

Bye/Bye.cpp

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+//
+// Created by shah on 13/03/16.
+//
+
+#include "Bye.h"
+
+std::string Bye::bye() {
+    return "bye";
+}
+
+void Bye::Saybye() {
+    std::cout<<bye()<<std::endl;
+}

Bye/Bye.h

@@ -0,0 +1,19 @@
+//
+// Created by shah on 13/03/16.
+//
+
+#ifndef SALUTATION_BYE_H
+#define SALUTATION_BYE_H
+
+
+#include <string>
+#include <iostream>
+
+class Bye {
+public:
+    std::string bye();
+    void Saybye();
+};
+
+
+#endif //SALUTATION_BYE_H

CMakeLists.txt

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+CMAKE_MINIMUM_REQUIRED(VERSION 2.8.8)
+##A template for a package containing multiple projects, in this case: Hello and Bye.
+PROJECT(Words)
+set(PROJECT_VERSION_MAJOR 1)
+set(PROJECT_VERSION_MINOR 1)
+############################################################
+## Versioning/installation information
+set(PROJECT_VERSION         "${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}")
+set(PROJECT_DIRNAME         "${PROJECT_NAME}-${PROJECT_VERSION}")
+
+set(PROJECT_DIRNAME_lib     "lib/${PROJECT_DIRNAME}")
+set(PROJECT_DIRNAME_include "include/${PROJECT_DIRNAME}")
+
+############################################################
+
+add_library(Hello   SHARED  Hello/Hello.cpp )
+add_library(Bye     STATIC  Bye/Bye.cpp )
+
+##List of libraries in the project
+set(PROJECT_LIBRARIES
+        Hello
+        Bye)
+
+##Installation target for Headers for the libraries.
+install(
+        FILES
+        Hello/Hello.h
+        DESTINATION
+        ${PROJECT_DIRNAME_include}/Hello
+)
+install(
+        FILES
+        Bye/Bye.h
+        DESTINATION
+        ${PROJECT_DIRNAME_include}/Bye
+)
+##Installation target for the Libraries exported from this package.
+install(
+        TARGETS
+        Bye
+        Hello
+        DESTINATION
+        ${PROJECT_DIRNAME_lib}
+        EXPORT
+        ${PROJECT_NAME}Exports
+)
+
+install(
+        EXPORT
+        ${PROJECT_NAME}Exports
+        DESTINATION
+        ${PROJECT_DIRNAME_lib}
+)
+
+############################################################
+##Config file configurations. PROJECT_DIRNAME_include will be made relocatable.
+
+include(CMakePackageConfigHelpers)
+configure_package_config_file(
+        "${CMAKE_CURRENT_SOURCE_DIR}/cmake/${PROJECT_NAME}Config.cmake.in"
+        "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
+        INSTALL_DESTINATION
+        ${PROJECT_DIRNAME_lib}
+        PATH_VARS
+        PROJECT_DIRNAME_include
+)
+
+write_basic_package_version_file(
+        "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake"
+        VERSION ${PROJECT_VERSION}
+        COMPATIBILITY AnyNewerVersion
+)
+
+############################################################
+##Installation target for the COnfig files configured in the previous step.
+
+install(
+        FILES
+        ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake
+        ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake
+        DESTINATION
+        ${PROJECT_DIRNAME_lib}
+)
+############################################################

Hello/Hello.cpp

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+//
+// Created by shah on 13/03/16.
+//
+
+#include "Hello.h"
+
+std::string Hello::hello() {
+    return "Hi";
+}
+
+void Hello::Sayhello() {
+    std::cout<<hello()<<std::endl;
+}

Hello/Hello.h

@@ -0,0 +1,21 @@
+//
+// Created by shah on 13/03/16.
+//
+
+#ifndef SALUTATION_HELLO_H
+#define SALUTATION_HELLO_H
+
+
+#include <string>
+#include <iostream>
+
+class Hello {
+    public:
+    std::string hello();
+    void Sayhello();
+};
+
+
+
+
+#endif //SALUTATION_HELLO_H

cmake/WordsConfig.cmake.in

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+@PACKAGE_INIT@
+
+#Looks up the info about the exported targets in this package
+IF(NOT TARGET @PROJECT_NAME@)
+INCLUDE(${CMAKE_CURRENT_LIST_DIR}/@PROJECT_NAME@Exports.cmake)
+ENDIF()
+
+############################################################
+
+##The public variables to be used by the client project:
+#PROJECT_NAME_INCLUDE_DIRS is all the include paths
+#PROJECT_NAME_LIBRARIES is the name of all the libraries
+##ie the client package can use proj1_INCLUDE_DIRS and proj1_LIBRARIES
+
+
+## PROJECT_LIBRARIES is filled-in during the package build
+SET(@PROJECT_NAME@_LIBRARIES @PROJECT_LIBRARIES@)
+
+## PACKAGE_PROJECT_DIRNAME_include is filled-in during the package build
+FOREACH(lib ${@PROJECT_NAME@_LIBRARIES})
+list(APPEND INCLUDE_DIRS @PACKAGE_PROJECT_DIRNAME_include@/${lib})
+ENDFOREACH(lib)
+
+#set_and_check() Makes sure that the created Config file does not contain
+#wrong references. Then we add it to the public PROJECT_NAME_INCLUDE_DIRS
+foreach (INCLUDE_DIR ${INCLUDE_DIRS})
+set_and_check(@PROJECT_NAME@_INCLUDE_DIR ${INCLUDE_DIR})
+list(APPEND @PROJECT_NAME@_INCLUDE_DIRS ${@PROJECT_NAME@_INCLUDE_DIR})
+endforeach ()