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Installation in Ubuntu

sudo apt install libgflags-dev

Usage in CMake

# gflags
find_package(GFlags REQUIRED) # gflags-config.cmake available
include_directories(${GFLAGS_INCLUDE_DIR}) # not DIRS
add_executable (main src/main.cpp)
target_link_libraries (main ${GFLAGS_LIBRARIES})


  • All DEFINE macros take the same three arguments: the name of the flag, its default value, and a 'help' string that describes its use. The 'help' string is displayed when the user runs the application with the --help flag.
#include <gflags/gflags.h>
DEFINE_string(config, "./config/default.yaml", "config file path");
int main(int argc, char **argv) {
google::ParseCommandLineFlags(&argc, &argv, true);
myslam::VisualOdometry::Ptr vo(new myslam::VisualOdometry(FLAGS_config));
// in visual_odometry.h
VisualOdometry(std::string &config_path);
Last modified 2yr ago