From b70d3e3f73b5b1c040d19eac3265073c4eae1664 Mon Sep 17 00:00:00 2001
From: William Allen <william.j.allen24@gmail.com>
Date: Sun, 7 May 2023 17:22:04 -0400
Subject: [PATCH 1/3] Link Boost statically

---
 Dockerfile                    |  1 -
 compare_hashes/CMakeLists.txt | 35 +++++++++++++++++++++++++++++++++++
 install_lichen.sh             |  5 +++--
 3 files changed, 38 insertions(+), 3 deletions(-)
 create mode 100644 compare_hashes/CMakeLists.txt

diff --git a/Dockerfile b/Dockerfile
index 9d3797a..ec4de49 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,6 @@ ARG DEBIAN_FRONTEND=noninteractive
 # C++ and Python
 RUN apt-get update \
     && apt-get install -y \
-       libboost-all-dev \
        python3.8 \
        python3-pip \
        clang-6.0 \
diff --git a/compare_hashes/CMakeLists.txt b/compare_hashes/CMakeLists.txt
new file mode 100644
index 0000000..04946d4
--- /dev/null
+++ b/compare_hashes/CMakeLists.txt
@@ -0,0 +1,35 @@
+cmake_minimum_required(VERSION 3.16)
+project(Lichen)
+set(CMAKE_CXX_STANDARD 14)
+
+set(Boost_USE_STATIC_LIBS ON)
+find_package(Boost REQUIRED COMPONENTS
+    system
+    filesystem
+)
+
+add_executable(Lichen
+    compare_hashes.cpp
+    submission.cpp
+)
+
+target_link_libraries(Lichen
+    Boost::system
+    Boost::filesystem
+)
+
+target_compile_options(Lichen PRIVATE
+    -Wall
+    -Wextra
+    -Werror
+    -g
+    -O3
+    -funroll-loops
+)
+target_link_options(Lichen PRIVATE
+    -flto
+)
+
+include_directories(/usr/local/submitty/Lichen/vendor)
+
+set_target_properties(Lichen PROPERTIES OUTPUT_NAME compare_hashes.out)
\ No newline at end of file
diff --git a/install_lichen.sh b/install_lichen.sh
index 801eade..4848d3c 100755
--- a/install_lichen.sh
+++ b/install_lichen.sh
@@ -54,8 +54,9 @@ fi
 ####################################################################################################
 # compile & install the hash comparison tool
 
-pushd "${lichen_repository_dir}" > /dev/null
-clang++ -I "${lichen_vendor_dir}" -lboost_system -lboost_filesystem -Wall -Wextra -Werror -g -Ofast -flto -funroll-loops -std=c++11 compare_hashes/compare_hashes.cpp compare_hashes/submission.cpp -o "${lichen_installation_dir}/compare_hashes/compare_hashes.out"
+pushd "${lichen_installation_dir}/compare_hashes" > /dev/null
+cmake "$lichen_repository_dir/compare_hashes"
+cmake --build .
 if [ "$?" -ne 0 ]; then
     echo -e "ERROR: FAILED TO BUILD HASH COMPARISON TOOL\n"
     exit 1

From 446bf4d1cdbef2c0028e82b711967ac36d842161 Mon Sep 17 00:00:00 2001
From: Chris Reed <55092742+cjreed121@users.noreply.github.com>
Date: Sun, 7 May 2023 18:48:38 -0400
Subject: [PATCH 2/3] Add static linking

---
 compare_hashes/CMakeLists.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/compare_hashes/CMakeLists.txt b/compare_hashes/CMakeLists.txt
index 04946d4..db27845 100644
--- a/compare_hashes/CMakeLists.txt
+++ b/compare_hashes/CMakeLists.txt
@@ -8,6 +8,8 @@ find_package(Boost REQUIRED COMPONENTS
     filesystem
 )
 
+link_libraries("-static")
+
 add_executable(Lichen
     compare_hashes.cpp
     submission.cpp
@@ -32,4 +34,4 @@ target_link_options(Lichen PRIVATE
 
 include_directories(/usr/local/submitty/Lichen/vendor)
 
-set_target_properties(Lichen PROPERTIES OUTPUT_NAME compare_hashes.out)
\ No newline at end of file
+set_target_properties(Lichen PROPERTIES OUTPUT_NAME compare_hashes.out)

From 75b75a04a86a7bb6aec98cb5bf622e02a1d28dc5 Mon Sep 17 00:00:00 2001
From: William Allen <william.j.allen24@gmail.com>
Date: Sun, 29 Mar 2026 20:51:36 -0400
Subject: [PATCH 3/3] Parallelize Lichen build

---
 install_lichen.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/install_lichen.sh b/install_lichen.sh
index 754feab..8532ec0 100755
--- a/install_lichen.sh
+++ b/install_lichen.sh
@@ -56,7 +56,7 @@ fi
 
 pushd "${lichen_installation_dir}/compare_hashes" > /dev/null
 cmake "$lichen_repository_dir/compare_hashes"
-cmake --build .
+cmake --build . --parallel "$(nproc)"
 if [ "$?" -ne 0 ]; then
     echo -e "ERROR: FAILED TO BUILD HASH COMPARISON TOOL\n"
     exit 1