print version info

Author: NikolasK-source

CMakeLists.txt

@@ -4,7 +4,7 @@ cmake_minimum_required(VERSION 3.13.4 FATAL_ERROR)
 # ======================================================================================================================
 
 # project
-project(write_shm LANGUAGES CXX VERSION 0.0.1)
+project(write_shm LANGUAGES CXX VERSION 0.1.0)
 
 # settings
 set(Target "write_shm")    # Executable name (without file extension!)
@@ -55,6 +55,10 @@ set_target_properties(${Target} PROPERTIES
         CXX_EXTENSIONS ${COMPILER_EXTENSIONS}
     )
 
+# project version and name
+target_compile_definitions(${Target} PUBLIC "PROJECT_VERSION=\"${CMAKE_PROJECT_VERSION}\"")
+target_compile_definitions(${Target} PUBLIC "PROJECT_NAME=\"${CMAKE_PROJECT_NAME}\"")
+
 # options that are valid for gcc and clang
 function(commonopts)
     # more debugging information

src/SHM.hpp

@@ -8,7 +8,7 @@ class SHM {
     std::string name;
     int         fd   = -1;
     std::size_t size = 0;
-    void *      addr = nullptr;
+    void       *addr = nullptr;
 
 public:
     explicit SHM(std::string name);

src/main.cpp

@@ -24,6 +24,7 @@ int main(int argc, char **argv) {
                           "output everything that is written to the shared memory to stdout",
                           cxxopts::value<bool>()->default_value("false"));
     options.add_options()("h,help", "print usage");
+    options.add_options()("version", "print version information");
 
     // parse arguments
     cxxopts::ParseResult args;
@@ -68,6 +69,11 @@ int main(int argc, char **argv) {
         exit(EX_OK);
     }
 
+    // print version
+    if (args.count("version")) {
+        std::cout << PROJECT_NAME << ' ' << PROJECT_VERSION << std::endl;
+        exit(EX_OK);
+    }
 
     // open shm
     std::unique_ptr<SHM> shm;