Use spdlog_extract_version() at standalone example

To use find_package(spdlog ${spdlog_VERSION} REQUIRED)

cmake/utils.cmake

@@ -1,6 +1,11 @@
 # Get spdlog version from include/spdlog/version.h and put it in SPDLOG_VERSION
 function(spdlog_extract_version)
-    file(READ "${CMAKE_CURRENT_LIST_DIR}/include/spdlog/version.h" file_contents)
+    if(CMAKE_PROJECT_NAME STREQUAL "spdlog_examples")
+        message(STATUS "project(spdlog_examples) ...")
+        file(READ "${CMAKE_SOURCE_DIR}/../include/spdlog/version.h" file_contents)
+    else()
+        file(READ "${CMAKE_CURRENT_LIST_DIR}/include/spdlog/version.h" file_contents)
+    endif()
     string(REGEX MATCH "SPDLOG_VER_MAJOR ([0-9]+)" _  "${file_contents}")
     if(NOT CMAKE_MATCH_COUNT EQUAL 1)
         message(FATAL_ERROR "Could not extract major version number from spdlog/version.h")
@@ -20,7 +25,7 @@ function(spdlog_extract_version)
     set(ver_patch ${CMAKE_MATCH_1})
 
     set(SPDLOG_VERSION_MAJOR ${ver_major} PARENT_SCOPE)
-    set (SPDLOG_VERSION "${ver_major}.${ver_minor}.${ver_patch}" PARENT_SCOPE)
+    set(SPDLOG_VERSION "${ver_major}.${ver_minor}.${ver_patch}" PARENT_SCOPE)
 endfunction()
 
 
@@ -28,7 +33,7 @@ endfunction()
 function(spdlog_enable_warnings target_name)
     target_compile_options(${target_name} PRIVATE
         $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>,$<CXX_COMPILER_ID:GNU>>:
-            -Wall -Wextra -Wconversion -pedantic -Wfatal-errors>
+            -Wall -Wextra -Wconversion -Wpedantic -Wfatal-errors>
         $<$<CXX_COMPILER_ID:MSVC>:/W4>)
         if(MSVC_VERSION GREATER  1900)  #Allow non fatal security wanrnings for msvc 2015
             target_compile_options(${target_name} PRIVATE /WX)
@@ -38,7 +43,7 @@ endfunction()
 
 # Enable address sanitizer (gcc/clang only)
 function(spdlog_enable_sanitizer target_name)
-    if (NOT CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
+    if(NOT CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
         message(FATAL_ERROR "Sanitizer supported only for gcc/clang")
     endif()
     message(STATUS "Address sanitizer enabled")

example/CMakeLists.txt

@@ -7,12 +7,16 @@ project(spdlog_examples CXX)
 
 if(NOT TARGET spdlog)
     # Stand-alone build
-    set(CMAKE_CXX_STANDARD 11)
-    set(CMAKE_CXX_STANDARD_REQUIRED ON)
+    if(NOT DEFINED CMAKE_CXX_STANDARD)
+        set(CMAKE_CXX_STANDARD 11)
+        set(CMAKE_CXX_STANDARD_REQUIRED ON)
+    endif()
     include(../cmake/utils.cmake)
-    #TODO spdlog_extract_version()
+    spdlog_extract_version()
 
+    message(STATUS "find_package(spdlog ${SPDLOG_VERSION} REQUIRED) ...")
     find_package(spdlog ${SPDLOG_VERSION} REQUIRED)
+    message(STATUS "... sdplog ${spdlog_CONSIDERED_VERSIONS} found at ${spdlog_DIR}")
 endif()
 
 #---------------------------------------------------------------------------------------