re2 as third party

Author: simonJJJ

.gitmodules

@@ -5,10 +5,9 @@
 	path = third_party/pybind11
 	url = https://github.com/pybind/pybind11.git
 	branch = stable
+[submodule "third_party/abseil-cpp"]
+	path = third_party/abseil-cpp
+	url = https://github.com/abseil/abseil-cpp.git
 [submodule "third_party/re2"]
 	path = third_party/re2
 	url = https://github.com/google/re2.git
-	branch = main
-[submodule "third_party/abseil"]
-	path = third_party/abseil
-	url = https://github.com/abseil/abseil-cpp.git

CMakeLists.txt

@@ -13,11 +13,10 @@ if (NOT CMAKE_BUILD_TYPE)
   set(CMAKE_BUILD_TYPE Release)
 endif ()
 
-#find_package(re2 REQUIRED)
-
 # third-party libraries
 set(ABSL_ENABLE_INSTALL ON)
-add_subdirectory(third_party/abseil)
+set(ABSL_PROPAGATE_CXX_STD ON)
+add_subdirectory(third_party/abseil-cpp)
 
 add_subdirectory(third_party/re2)