remove submodules (replaced with FetchContent)

Author: NikolasK-source

.gitmodules

@@ -1,12 +1,3 @@
-[submodule "libs/cxxopts"]
-	path = libs/cxxopts
-	url = https://github.com/NikolasK-source/cxxopts.git
 [submodule "libs/libmodbus"]
 	path = libs/libmodbus
 	url = https://github.com/stephane/libmodbus
-[submodule "libs/cxxshm"]
-	path = libs/cxxshm
-	url = https://github.com/NikolasK-source/cxxshm.git
-[submodule "libs/cxxsemaphore"]
-	path = libs/cxxsemaphore
-	url = https://github.com/NikolasK-source/cxxsemaphore.git

libs/CMakeLists.txt

@@ -2,17 +2,47 @@
 # ---------------------------------------- subdirectories --------------------------------------------------------------
 # ======================================================================================================================
 include(../modbus.cmake)
-target_link_libraries(${Target} PRIVATE modbus)
+
+
+# ---------------------------------------- fetch content ---------------------------------------------------------------
+# ======================================================================================================================
+include(FetchContent)
+
+# cxxopts (jarro2783)
+FetchContent_Declare(
+        cxxopts
+        GIT_REPOSITORY https://github.com/jarro2783/cxxopts.git
+        GIT_TAG v3.2.0
+        EXCLUDE_FROM_ALL
+)
+
+set(CXXOPTS_STANDALONE_PROJECT ON CACHE BOOL "" FORCE)
+FetchContent_MakeAvailable(cxxopts)
+
+# cxxshm
+FetchContent_Declare(
+        cxxshm
+        GIT_REPOSITORY https://github.com/NikolasK-source/cxxshm.git
+        GIT_TAG v1.1.0
+        EXCLUDE_FROM_ALL
+)
+
+FetchContent_MakeAvailable(cxxshm)
+
+# cxxsemaphore
+FetchContent_Declare(
+        cxxsemaphore
+        GIT_REPOSITORY https://github.com/NikolasK-source/cxxsemaphore.git
+        GIT_TAG v1.0.1
+        EXCLUDE_FROM_ALL
+)
+
+FetchContent_MakeAvailable(cxxsemaphore)
 
 # ---------------------------------------- link libraries --------------------------------------------------------------
 # ======================================================================================================================
+target_link_libraries(${Target} PRIVATE modbus)
 target_link_libraries(${Target} PRIVATE rt)
-
-add_subdirectory(cxxopts EXCLUDE_FROM_ALL)
 target_link_libraries(${Target} PRIVATE cxxopts)
-
-add_subdirectory(cxxshm EXCLUDE_FROM_ALL)
 target_link_libraries(${Target} PRIVATE cxxshm)
-
-add_subdirectory(cxxsemaphore EXCLUDE_FROM_ALL)
 target_link_libraries(${Target} PRIVATE cxxsemaphore)

libs/cxxopts

@@ -183,7 +183,7 @@ int main(int argc, char **argv) {
     cxxopts::ParseResult args;
     try {
         args = options.parse(argc, argv);
-    } catch (cxxopts::OptionParseException &e) {
+    } catch (cxxopts::exceptions::exception &e) {
         std::cerr << Print_Time::iso << " ERROR: Failed to parse arguments: " << e.what() << '.' << std::endl;
         return exit_usage();
     }