libeigen3-dev missing in the install dependency list

[VRichardJP]

While preparing a custom dockerfile for GLIM I have observed libeigen3-dev is missing from the installation dependencies described at https://koide3.github.io/glim/installation.html. Based on the HTML documentation I wrote the following dockerfile:

FROM nvidia/cuda:12.8.0-devel-ubuntu22.04

ENV DEBIAN_FRONTEND=noninteractive

# ...

# Install dependencies
RUN apt-get update && apt install -y \
  libomp-dev libboost-all-dev libmetis-dev libfmt-dev \
  libspdlog-dev libglm-dev libglfw3-dev libpng-dev libjpeg-dev \
  && rm -rf /var/lib/apt/lists/*

# Install GTSAM
RUN cd / && git clone https://github.com/borglab/gtsam \
  && cd gtsam && git checkout 4.2a9 \
  && mkdir build && cd build \
  && cmake .. -DGTSAM_BUILD_EXAMPLES_ALWAYS=OFF \
           -DGTSAM_BUILD_TESTS=OFF \
           -DGTSAM_WITH_TBB=OFF \
           -DGTSAM_USE_SYSTEM_EIGEN=ON \
           -DGTSAM_BUILD_WITH_MARCH_NATIVE=OFF \
  && make -j8 \
  && make install

# ...

This dockerfile fails to build because eigen3 is not found during GTSAM cmake configuration:

[...]
#11 15.56 -- GTSAM_POSE3_EXPMAP=ON, enabling GTSAM_ROT3_EXPMAP as well
#11 16.10 -- Found Boost: /usr/lib/x86_64-linux-gnu/cmake/Boost-1.71.0/BoostConfig.cmake (found suitable version "1.71.0", minimum required is "1.65") found components: serialization system filesystem thread program_options date_time timer chrono regex 
#11 16.10 CMake Error at cmake/HandleEigen.cmake:14 (find_package):
#11 16.10   Could not find a package configuration file provided by "Eigen3" with any
#11 16.10   of the following names:
#11 16.10 
#11 16.10     Eigen3Config.cmake
#11 16.10     eigen3-config.cmake
#11 16.10 
#11 16.10   Add the installation prefix of "Eigen3" to CMAKE_PREFIX_PATH or set
#11 16.10   "Eigen3_DIR" to a directory containing one of the above files.  If "Eigen3"
#11 16.10   provides a separate development package or SDK, be sure it has been
#11 16.10   installed.
#11 16.10 Call Stack (most recent call first):
#11 16.10   CMakeLists.txt:57 (include)
#11 16.10 
#11 16.10 
#11 16.10 -- Configuring incomplete, errors occurred!
#11 16.10 See also "/gtsam/build/CMakeFiles/CMakeOutput.log".
#11 16.10 See also "/gtsam/build/CMakeFiles/CMakeError.log".

Adding libeigen3-dev solves the issue.