enhancement: no need to build abseil-cpp anymore

CMakeLists.txt

@@ -64,7 +64,7 @@ include_directories(
 enable_testing()
 add_subdirectory(thirdparty/googletest)
 add_subdirectory(thirdparty/gflags)
-add_subdirectory(thirdparty/abseil-cpp)
+# add_subdirectory(thirdparty/abseil-cpp)
 if (BUILD_G2O)
   link_directories(${PROJECT_SOURCE_DIR}/thirdparty/g2o/release/lib)
   include_directories(${PROJECT_SOURCE_DIR}/thirdparty/g2o/release/include)

README.md

@@ -54,14 +54,14 @@ This software is built and tested on Ubuntu 16.04 and 18.04 with compiler g++ 7.
 - [OpenCV][opencv]: Feature detection and tracking.
 - [Eigen][eigen]: Linear algebra.
 - [Pangolin][pangolin]: Lightweight visualization.
-- [abseil-cpp][absl]: General utilities.
 - [glog][glog]: Logging.
 - [gflags][gflags]: Command-line options.
 - [jsoncpp][jsoncpp]: Configuration.
-- [pybind11][pybind11]: Python binding.
 - (optional) [googletest][gtest]: Unit tests.
 - (optional) [g2o][g2o]: To use pose graph optimization.
 - (optional) [ROS][ros]: To use in live mode with ROS.
+- (optional) [pybind11][pybind11]: Python binding.
+<!-- - [abseil-cpp][absl]: General utilities. -->
 
 Dependencies are included in the `thirdparty` directory.
 

common/CMakeLists.txt

@@ -6,7 +6,7 @@ project(common)
 # set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${PROJECT_SOURCE_DIR}/lib)
 
 add_library(common STATIC utils.cpp)
-target_link_libraries(common absl::str_format pthread)
+target_link_libraries(common pthread)
 
 # option(BUILD_COMMON_TESTS True)
 # if (${BUILD_COMMON_TESTS})