From 92658df3794c52f27f3a6f680b9692a86bd41cf8 Mon Sep 17 00:00:00 2001
From: Serge Lamikhov-Center <to_serge@hotmail.com>
Date: Sat, 9 Jul 2022 16:25:29 +0300
Subject: [PATCH] In case of the top project, build examples and tests by
 default

---
 CMakeLists.txt | 64 +++++++++++++++++++++++++++-----------------------
 1 file changed, 35 insertions(+), 29 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4660420..0aa0d83 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,22 +3,26 @@ cmake_minimum_required(VERSION 3.10)
 # Detect if we are the top level CMakeLists.txt or are we included in some
 # other project
 if(NOT DEFINED PROJECT_NAME)
-  set(IS_TOP_PROJECT TRUE)
+    set(IS_TOP_PROJECT TRUE)
 endif()
 
-# Turn this on in order to build elfio examples
-option(ELFIO_BUILD_EXAMPLES "Build ELFIO examples" OFF)
+if(IS_TOP_PROJECT)
+    # Turn this on in order to build elfio examples
+    option(ELFIO_BUILD_EXAMPLES "Build ELFIO examples" ON)
 
-# Turns this on in order to build tests
-option(ELFIO_BUILD_TESTS    "Build ELFIO tests" OFF)
+    # Turns this on in order to build tests
+    option(ELFIO_BUILD_TESTS "Build ELFIO tests" ON)
+endif()
 
 # Read version from header file
 set(version_header "elfio/elfio_version.hpp")
 file(READ ${version_header} ver)
 string(REGEX MATCH "#define ELFIO_VERSION \"([0-9\.]+)\"" _ ${ver})
-if (NOT CMAKE_MATCH_1)
+
+if(NOT CMAKE_MATCH_1)
     message(FATAL_ERROR "Unable to parse version from ${version_header}")
 endif()
+
 set(version ${CMAKE_MATCH_1})
 
 # Use configure_file to make configure step depend on elfio_version.hpp
@@ -35,22 +39,22 @@ add_library(elfio::elfio ALIAS elfio)
 target_include_directories(
     elfio
     INTERFACE
-        $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
-        $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
+    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
 
 # If this is the top level project, add in logic to install elfio
-if (IS_TOP_PROJECT)
+if(IS_TOP_PROJECT)
     # Enable C++11 for examples and tests
-    if (ELFIO_BUILD_EXAMPLES OR ELFIO_BUILD_TESTS)
+    if(ELFIO_BUILD_EXAMPLES OR ELFIO_BUILD_TESTS)
         set(CMAKE_CXX_STANDARD 11)
     endif()
 
-    if (ELFIO_BUILD_EXAMPLES)
+    if(ELFIO_BUILD_EXAMPLES)
         # set (CMAKE_CXX_FLAGS "-Wall")
         add_subdirectory(examples)
     endif()
 
-    if (ELFIO_BUILD_TESTS AND IS_TOP_PROJECT)
+    if(ELFIO_BUILD_TESTS AND IS_TOP_PROJECT)
         # set (CMAKE_CXX_FLAGS "-Wall")
         enable_testing()
         add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND} USES_TERMINAL)
@@ -64,32 +68,32 @@ if (IS_TOP_PROJECT)
     write_basic_package_version_file(
         "${PROJECT_NAME}ConfigVersion.cmake"
         VERSION
-            ${PROJECT_VERSION}
+        ${PROJECT_VERSION}
         COMPATIBILITY
-            SameMajorVersion)
-    
+        SameMajorVersion)
+
     # Create the default ${PROJECT_NAME}Config.cmake file which will be
     # installed and found by calls to `find_package(elfio)`.
     configure_package_config_file(
         "${PROJECT_SOURCE_DIR}/cmake/${PROJECT_NAME}Config.cmake.in"
         "${PROJECT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
         INSTALL_DESTINATION
-            ${CMAKE_INSTALL_DATAROOTDIR}/${PROJECT_NAME}/cmake)
+        ${CMAKE_INSTALL_DATAROOTDIR}/${PROJECT_NAME}/cmake)
 
     # Install the previously generated "config" and "version" files
     install(
         FILES
-            "${PROJECT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
-            "${PROJECT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake"
+        "${PROJECT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
+        "${PROJECT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake"
         DESTINATION
-            ${CMAKE_INSTALL_DATAROOTDIR}/${PROJECT_NAME}/cmake)
+        ${CMAKE_INSTALL_DATAROOTDIR}/${PROJECT_NAME}/cmake)
 
     # Install the entire local `elfio` directory to the include directory
     install(
         DIRECTORY
-            elfio
+        elfio
         DESTINATION
-            ${CMAKE_INSTALL_INCLUDEDIR})
+        ${CMAKE_INSTALL_INCLUDEDIR})
 
     # Create a ${PROJECT_NAME}Targets.cmake file that is referenced by the
     # ${PROJECT_NAME}Config.cmake file and includes the target information
@@ -97,27 +101,29 @@ if (IS_TOP_PROJECT)
     # ${PROJECT_NAME}_Targets export
     install(
         EXPORT
-            ${PROJECT_NAME}_Targets
+        ${PROJECT_NAME}_Targets
         FILE
-            ${PROJECT_NAME}Targets.cmake
+        ${PROJECT_NAME}Targets.cmake
         NAMESPACE
-            ${PROJECT_NAME}::
+        ${PROJECT_NAME}::
         DESTINATION
-            ${CMAKE_INSTALL_DATAROOTDIR}/${PROJECT_NAME}/cmake)
+        ${CMAKE_INSTALL_DATAROOTDIR}/${PROJECT_NAME}/cmake)
 
     # Add the elfio target to the ${PROJECT_NAME}_Targets export
     install(
         TARGETS
-            elfio
+        elfio
         EXPORT
-            ${PROJECT_NAME}_Targets)
+        ${PROJECT_NAME}_Targets)
 
     # cmake -B build; cmake --build build; cpack --config build/CPackSourceConfig.cmake
     # cmake -B build -D ELFIO_BUILD_EXAMPLES=ON -DELFIO_BUILD_TESTS=ON -G Ninja; cmake --build build; cpack --config build/CPackSourceConfig.cmake
     set(_fmt TGZ)
+
     if(WIN32)
-    set(_fmt ZIP)
+        set(_fmt ZIP)
     endif()
+
     set(CPACK_GENERATOR ${_fmt})
     set(CPACK_SOURCE_GENERATOR ${_fmt})
     set(CPACK_PACKAGE_VENDOR "ELFIO")
@@ -134,7 +140,7 @@ if (IS_TOP_PROJECT)
     set(CPACK_SOURCE_IGNORE_FILES "/.git/;/.github/;/.vscode/;/build;/.clang-format;/.gitignore;/.travis.yml;/doc/images/;/doc/site;/doc/elfio.docx;/examples/sudo_gdb.sh;/tests")
 
     install(FILES ${CPACK_RESOURCE_FILE_README} ${CPACK_RESOURCE_FILE_LICENSE}
-            DESTINATION share/docs/${PROJECT_NAME})
+        DESTINATION share/docs/${PROJECT_NAME})
 
     include(CPack)
 endif()