remove cxxshm submodule

Author: NikolasK-source

.gitmodules

@@ -4,9 +4,6 @@
 [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

@@ -1,4 +1,6 @@
 
+find_package(cxxshm)
+
 # ---------------------------------------- subdirectories --------------------------------------------------------------
 # ======================================================================================================================
 include(../modbus.cmake)
@@ -11,7 +13,6 @@ 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)