Replaced spdlog submodule with CPM.

.gitmodules

@@ -34,9 +34,6 @@
 [submodule "ThirdParty/json-cmake"]
 	path = ThirdParty/json-cmake
 	url = https://github.com/ufz/json-cmake.git
-[submodule "ThirdParty/spdlog"]
-	path = ThirdParty/spdlog
-	url = https://github.com/gabime/spdlog.git
 [submodule "ThirdParty/xdmf"]
 	path = ThirdParty/xdmf
 	url = https://gitlab.opengeosys.org/ogs/xdmflib.git

CMakeLists.txt

@@ -225,7 +225,7 @@ include_directories(
     ${CMAKE_CURRENT_SOURCE_DIR}/ThirdParty
     ${CMAKE_CURRENT_SOURCE_DIR}/ThirdParty/tclap/include
     ${CMAKE_CURRENT_SOURCE_DIR}/ThirdParty/json/include
-    ${CMAKE_CURRENT_SOURCE_DIR}/ThirdParty/spdlog/include)
+)
 
 # vtkdiff
 if(BUILD_TESTING)

ThirdParty/CMakeLists.txt

-add_subdirectory(spdlog)
-set(DISABLE_WARNINGS_TARGETS spdlog)
-
 # This is a workaround for Travis builds.
 option(OGS_USE_OPTIONAL_SUBMODULES "Option for enabling optional submodules" OFF)
 

spdlog @ de0dbfa3

-Subproject commit de0dbfa3596a18cd70a4619b6a9766847a941276

scripts/cmake/Find.cmake

@@ -32,6 +32,13 @@ if(exprtk_ADDED)
     target_include_directories(exprtk INTERFACE ${exprtk_SOURCE_DIR})
 endif()
 
+CPMAddPackage(
+    NAME spdlog
+    GITHUB_REPOSITORY gabime/spdlog
+    VERSION 1.8.2
+    # DOWNLOAD_ONLY YES
+)
+
 ######################
 ### Find tools     ###
 ######################

scripts/cmake/SubmoduleSetup.cmake

@@ -12,7 +12,6 @@ set(REQUIRED_SUBMODULES
     ThirdParty/cmake-modules
     ThirdParty/iphreeqc/src
     ThirdParty/json-cmake
-    ThirdParty/spdlog
     ThirdParty/tclap
     ThirdParty/tetgen
     ${OGS_ADDITIONAL_SUBMODULES_TO_CHECKOUT}