update more examples to use shorthand syntax (#223)

* update more examples to use shorthand syntax

* revert google-benchmark as tests require googletest to be installed

* update comments

* always quote single-arguments

* undo accidental deletion

Author: TheLartians

README.md

@@ -266,43 +266,25 @@ See the [wiki](https://github.com/cpm-cmake/CPM.cmake/wiki/More-Snippets) for mo
 ### [Catch2](https://github.com/catchorg/Catch2)
 
 ```cmake
-CPMAddPackage(gh:catchorg/[email protected])
+CPMAddPackage("gh:catchorg/[email protected]")
 ```
 
 ### [Boost (via boost-cmake)](https://github.com/Orphis/boost-cmake)
 
 ```CMake
-CPMAddPackage(gh:Orphis/[email protected])
+CPMAddPackage("gh:Orphis/[email protected]")
 ```
 
 ### [cxxopts](https://github.com/jarro2783/cxxopts)
 
 ```cmake
-CPMAddPackage(
-  NAME cxxopts
-  GITHUB_REPOSITORY jarro2783/cxxopts
-  VERSION 2.2.0
-  OPTIONS
-    "CXXOPTS_BUILD_EXAMPLES Off"
-    "CXXOPTS_BUILD_TESTS Off"
-)
+CPMAddPackage("gh:jarro2783/[email protected]")
 ```
 
 ### [Yaml-cpp](https://github.com/jbeder/yaml-cpp)
 
 ```CMake
-CPMAddPackage(
-  NAME yaml-cpp
-  GITHUB_REPOSITORY jbeder/yaml-cpp
-  # 0.6.2 uses deprecated CMake syntax
-  VERSION 0.6.3
-  # 0.6.3 is not released yet, so use a recent commit
-  GIT_TAG 012269756149ae99745b6dafefd415843d7420bb
-  OPTIONS
-    "YAML_CPP_BUILD_TESTS Off"
-    "YAML_CPP_BUILD_CONTRIB Off"
-    "YAML_CPP_BUILD_TOOLS Off"
-)
+CPMAddPackage("gh:jbeder/yaml-cpp#[email protected]")
 ```
 
 ### [google/benchmark](https://github.com/google/benchmark)
@@ -311,14 +293,13 @@ CPMAddPackage(
 CPMAddPackage(
   NAME benchmark
   GITHUB_REPOSITORY google/benchmark
-  VERSION 1.4.1
-  OPTIONS
-    "BENCHMARK_ENABLE_TESTING Off"
+  VERSION 1.5.2
+  OPTIONS "BENCHMARK_ENABLE_TESTING Off"
 )
 
-if (benchmark_ADDED)
-  # compile with C++17
-  set_target_properties(benchmark PROPERTIES CXX_STANDARD 17)
+if(benchmark_ADDED)
+  # enable c++11 to avoid compilation errors
+  set_target_properties(benchmark PROPERTIES CXX_STANDARD 11)
 endif()
 ```
 

examples/asio-standalone/CMakeLists.txt

@@ -8,12 +8,7 @@ include(../../cmake/CPM.cmake)
 
 find_package(Threads REQUIRED)
 
-CPMAddPackage(
-  NAME asio
-  VERSION 1.18.1
-  GITHUB_REPOSITORY chriskohlhoff/asio
-  GIT_TAG asio-1-18-1 # asio uses non-standard version tag, we must specify GIT_TAG
-)
+CPMAddPackage("gh:chriskohlhoff/asio#[email protected]")
 
 # ASIO doesn't use CMake, we have to configure it manually. Extra notes for using on Windows:
 #

examples/benchmark/CMakeLists.txt

@@ -16,7 +16,7 @@ CPMAddPackage(
 )
 
 if(benchmark_ADDED)
-  # Don't use C++14 because it doesn't work in some configurations.
+  # enable c++11 to avoid compilation errors
   set_target_properties(benchmark PROPERTIES CXX_STANDARD 11)
 endif()
 

examples/boost/CMakeLists.txt

@@ -15,6 +15,7 @@ CPMFindPackage(
   NAME Boost
   GITHUB_REPOSITORY Orphis/boost-cmake
   VERSION 1.67.0
+  # setting FIND_PACKAGE_ARGUMENTS allow usage with `CPM_USE_LOCAL_PACKAGES`
   FIND_PACKAGE_ARGUMENTS "COMPONENTS system"
 )
 

examples/cxxopts/CMakeLists.txt

@@ -6,12 +6,7 @@ project(CPMExampleCXXOpts)
 
 include(../../cmake/CPM.cmake)
 
-CPMAddPackage(
-  NAME cxxopts
-  GITHUB_REPOSITORY jarro2783/cxxopts
-  VERSION 2.2.0
-  OPTIONS "CXXOPTS_BUILD_EXAMPLES Off" "CXXOPTS_BUILD_TESTS Off"
-)
+CPMAddPackage("gh:jarro2783/[email protected]")
 
 # ---- Create binary ----
 

examples/yaml/CMakeLists.txt

@@ -6,13 +6,7 @@ project(CPMYamlExample)
 
 include(../../cmake/CPM.cmake)
 
-CPMAddPackage(
-  NAME yaml-cpp
-  GIT_REPOSITORY https://github.com/jbeder/yaml-cpp.git
-  VERSION 0.6.3
-  GIT_TAG yaml-cpp-0.6.3
-  OPTIONS "YAML_CPP_BUILD_TESTS Off" "YAML_CPP_BUILD_CONTRIB Off" "YAML_CPP_BUILD_TOOLS Off"
-)
+CPMAddPackage("gh:jbeder/yaml-cpp#[email protected]")
 
 # ---- Executable ----